DESCRIPTION
FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10, Rule 13]
MOTOR;
MITSUBISHI ELECTRIC CORPORATION, A CORPORATION
ORGANISED AND EXISTING UNDER THE LAWS OF JAPAN, WHOSE
ADDRESS IS 7-3, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO
1008310, JAPAN
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE
INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

2
Description
Technical Field
[0001]
The present disclosure relates to a motor.
5 Background Art
[0002]
There is known a motor in which the length of a stator
in an axial direction is generally equal to the length of a
rotor main body in the axial direction. For example, see
10 Patent Literature 1.
Citation List
Patent Literature
[0003]
Patent Literature 1: Japanese Patent Application
15 Publication No. 2005-198440 (see, e.g., FIG. 1)
Summary of Invention
Technical Problem
[0004]
However, in the motor of Patent Literature 1, when the
20 length of the stator in the axial direction is made less
than the length of the rotor main body in the axial
direction in order to reduce the cost of the motor, the
amount of magnetic flux flowing from the rotor main body to
the stator is reduced. There is desired a technique for
25 reducing the reduction in the amount of magnetic flux
flowing from the rotor main body to the stator while saving
the cost of the motor.
[0005]
An object of the present disclosure is to reduce the
30 reduction in the amount of magnetic flux flowing from the
rotor main body to the stator while saving the cost.
Solution to Problem
[0006]

3
A motor according to an aspect of the present
disclosure includes: a rotor main body supported by a rotary
shaft; and a stator, wherein the stator includes: a stator
core having a first end surface that is one end surface in
5 an axial direction of the rotary shaft, and a second end
surface that is another end surface in the axial direction,
a length of the stator core in the axial direction being
less than a length of the rotor main body in the axial
direction; at least one flux capture member disposed on at
10 least one of the first end surface and the second end
surface and made of magnetic material, the at least one flux
capture member capturing a magnetic flux of the rotor main
body; and a molded resin portion covering the at least one
flux capture member and the stator core.
15 Advantageous Effects of Invention
[0007]
The present disclosure makes it possible to reduce the
reduction in the amount of magnetic flux flowing from the
rotor main body to the stator while saving the cost.
20 Brief Description of Drawings
[0008]
FIG. 1 is a sectional view illustrating a configuration
of a motor according to a first embodiment.
FIG. 2 is a plan view illustrating a configuration of a
25 stator core of a stator of the motor illustrated in FIG. 1.
FIG. 3 is an enlarged sectional view illustrating part
of the configuration of the motor illustrated in FIG. 1.
FIG. 4 is an enlarged plan view illustrating part of
the configuration of the stator of the motor according to
30 the first embodiment.
FIG. 5 is a sectional view illustrating a configuration
of a motor according to a second embodiment.
FIG. 6 is a sectional view illustrating a configuration
of a motor according to a first modification of the second

4
embodiment.
FIG. 7 is a sectional view illustrating a configuration
of a motor according to a second modification of the second
embodiment.
5 FIG. 8 is a sectional view illustrating a configuration
of a motor according to a third modification of the second
embodiment.
Description of Embodiments
[0009]
10 Motors according to embodiments of the present
disclosure will be described below with reference to the
drawings. The following embodiments are merely examples, and
can be modified in various ways within the scope of the
present disclosure.
15 [0010]
To facilitate understanding of relationships between
the drawings, each drawing shows an xyz orthogonal
coordinate system. The z axis is a coordinate axis parallel
to axes C of rotors of motors. The x axis is a coordinate
20 axis perpendicular to the z axis. The y axis is a coordinate
axis perpendicular to both the x and z axes.
[0011]
FIG. 1 is a sectional view illustrating a configuration
of a motor 100 according to a first embodiment. As
25 illustrated in FIG. 1, the motor 100 includes a rotor 1, a
bearing 2 as a first bearing, a bearing 3 as a second
bearing, a metal bracket 4 as a first bearing holder, and a
molded stator 5 as a stator.
[0012]
30 The rotor 1 includes a shaft 11 as a rotary shaft, and
a permanent magnet 12 as a rotor main body. The rotor 1 is
rotatable about an axis C of the shaft 11. The shaft 11
projects in the +z-axis direction from the molded stator 5.
In the following description, a direction along a

5
circumference of a circle centered on the axis C of the
shaft 11 is referred to as a “circumferential direction”
(e.g., circumferential direction R shown by an arrow in FIG.
2 to be described later). Also, the z-axis direction is
5 referred to as an “axial direction”, and directions
perpendicular to the axial direction are referred to as
“radial directions”. Also, a side (i.e., the +z-axis side)
on which the shaft 11 projects is referred to as a “load
side”, and a side (i.e., the -z-axis side) opposite the load
10 side of the shaft 11 is referred to as an “anti-load side”.
[0013]
The permanent magnet 12 is mounted to the shaft 11. In
the example illustrated in FIG. 1, the permanent magnet 12
is a cylindrical magnet elongated in the z-axis direction.
15 North poles and south poles are alternately formed in an
outer periphery of the permanent magnet 12. The rotor main
body of the rotor 1 may be constituted by a rotor core fixed
to the shaft 11 and the permanent magnet 12 mounted to the
rotor core.
20 [0014]
The bearing 2 is a bearing that supports the load side
of the shaft 11, and the bearing 3 is a bearing that
supports the anti-load side of the shaft 11. The bearing 2
is held by the metal bracket (also referred to below as the
25 “first metal bracket”) 4. The metal bracket 4 is formed from,
for example, a steel sheet. The bearing 3 is held by a
bearing holder (i.e., bearing holder 52 to be described
later) provided in the molded stator 5.
[0015]
30 The molded stator 5 includes a stator core 20, multiple
coils 30, flux capture members 41 and 42, and a molded resin
portion 50.
[0016]
FIG. 2 is a plan view illustrating part of the

6
configuration of the stator core 20 illustrated in FIG. 1.
As illustrated in FIG. 2, the stator core 20 has a first end
surface 22c that is an end surface on one side (i.e., the
+z-axis side) in the z-axis direction, and a second end
5 surface 22d that is an end surface on the other side (i.e.,
the -z-axis side) in the z-axis direction. Also, the stator
core 20 includes a yoke 21 extending in the circumferential
direction R, and multiple teeth 22. The multiple teeth 22
are arranged at predetermined intervals in the
10 circumferential direction R. A slot 23 is formed between
each two of the multiple teeth 22 adjacent to each other in
the circumferential direction R. The slots 23 are spaces in
which the coils 30 are accommodated. The multiple coils 30
illustrated in FIG. 1 are wound around the respective teeth
15 22.
[0017]
The multiple teeth 22 face the rotor 1 (see FIG. 1) in
radial directions. Each of the multiple teeth 22 includes a
tooth main body 22a and a tooth tip 22b. The tooth main body
20 22a extends inward in a radial direction from the yoke 21.
The tooth tip 22b is located inward from the tooth main body
22a in the radial direction, and is wider than the tooth
main body 22a in the circumferential direction R.
[0018]
25 FIG. 3 is an enlarged sectional view illustrating part
of the configuration of the motor 100 illustrated in FIG. 1.
As illustrated in FIG. 3, when a first length that is a
length of the stator core 20 in the z-axis direction is
denoted by L1, and a second length that is a length of the
30 permanent magnet 12 in the z-axis direction is denoted by L2,
the length L1 is less than the length L2. That is, the
lengths L1 and L2 satisfy the following formula (1):
L1 < L2. (1)

7
Here, the stator core 20 includes multiple
electromagnetic steel sheets (not illustrated) stacked in
the z-axis direction. By virtue of the lengths L1 and L2
5 satisfying formula (1), since the number of electromagnetic
steel sheets provided in the stator core 20 is reduced, the
cost of the stator core 20 can be reduced. Thus, the cost of
the motor 100 can be reduced. In the first embodiment, the
first end surface 22c and second end surface 22d of the
10 stator core 20 are located between an end surface 12a of the
permanent magnet 12 on the +z-axis side and an end surface
12b of the permanent magnet 12 on the -z-axis side. The
motor 100 can be implemented such that one of the first end
surface 22c and second end surface 22d is not located
15 between the end surface 12a of the permanent magnet 12 on
the +z-axis side and the end surface 12b of the permanent
magnet 12 on the -z-axis side. For example, the second end
surface 22d of the stator core 20 may be located outward
from the end surface 12b of the permanent magnet 12 on the -
20 z-axis side in the axial direction.
[0019]
In general, when the length of a stator core in the zaxis direction is less than the length of a rotor main body
(in the first embodiment, the permanent magnet 12) in the z25 axis direction, the magnetic flux generated from the portion
of the rotor main body that does not face the stator core in
radial directions is less likely to flow to the stator.
Specifically, since it is less likely to flow from end
portions of the rotor main body on both sides in the z-axis
30 direction to the stator core and coils, the amount of
magnetic flux flowing from the rotor main body to the stator
is reduced. In this case, the efficiency of the motor is
reduced.
[0020]

8
In the motor 100 according to the first embodiment, the
flux capture members 41 and 42 are respectively disposed on
first end surfaces 22c and second end surfaces 22d of the
teeth 22. The flux capture members 41 and 42 are made of
5 magnetic material, and capture the magnetic flux of the
permanent magnet 12. Thereby, the magnetic flux generated
from a portion (e.g., the first end surface 12a and second
end surface 12b of the permanent magnet 12) of the permanent
magnet 12 that does not face the stator core 20 in radial
10 directions easily flows to the stator core 20 and coils 30
through the flux capture members 41 and 42. This can prevent
reduction in the efficiency of the motor 100.
[0021]
Also, since the flux capture members 41 and 42 are
15 disposed on the teeth 22 of the stator core 20, the flux
capture members 41 and 42 are located close to the permanent
magnet 12, and thus the magnetic flux of the permanent
magnet 12 is easily captured by the flux capture members 41
and 42. Also, in the example illustrated in FIG. 3, the
20 whole of the surface of each of the flux capture members 41
and 42 facing inward in radial directions faces an inner
periphery of the permanent magnet 12 in radial directions.
It is possible that at least part of the surface facing
inward in radial directions faces the inner periphery of the
25 permanent magnet 12. Also, as illustrated in FIG. 5 to be
described later or the like, the molded stator 5 may be
implemented such that it does not include the flux capture
members 42 of the flux capture members 41 and 42.
[0022]
30 The flux capture members 41 and 42 are, for example,
metal pieces made of metal. Specifically, the flux capture
members 41 and 42 are iron pieces made of iron. The flux
capture members 41 and 42 and stator core 20 are covered by
the molded resin portion 50. Thereby, the flux capture

9
members 41 and 42 are fixed to the stator core 20. Since the
flux capture members 41 and 42 and stator core 20 are
covered by the molded resin portion 50, no fasteners (e.g.,
bolts) for fixing the flux capture members 41 and 42 to the
5 stator core 20 are required. This can reduce the number of
parts of the motor 100, and simplify the assembly process of
the motor 100.
[0023]
Of end surfaces of the flux capture members 41 and 42
10 in the z-axis direction, the end surfaces of the flux
capture members 41 and 42 on the stator core 20 side are in
contact with the first end surface 22c and second end
surface 22d, respectively. Also, the flux capture members 41
and 42 are elongated in the z-axis direction. Thereby, the
15 flux capture members 41 and 42 face end portions of the
permanent magnet 12 on both sides in the z-axis direction,
in radial directions. Thus, the magnetic flux of the
permanent magnet 12 easily flows to the flux capture members
41 and 42, and thus the magnetic flux easily flows to the
20 stator core 20 and coils 30 through the flux capture members
41 and 42.
[0024]
The molded resin portion 50 is made of, for example,
thermosetting resin. The molded resin portion 50 is molded
25 by, for example, injection molding. Also, the molded resin
portion 50 is integrated with the stator core 20, coils 30,
flux capture members 41 and 42, and a first insulator 60 and
a second insulator 70 to be described later, by integral
molding.
30 [0025]
The molded resin portion 50 includes an opening (also
referred to below as the “first opening”) 51, and the
bearing holder 52. The metal bracket 4 is fixed in the
opening 51. The metal bracket 4 is fixed in the opening 51

10
by, for example, press fitting.
[0026]
The bearing holder 52 is a recess in the molded resin
portion 50 in which the bearing 3 on the anti-load side is
5 held. A circuit board 8 is embedded in a portion of the
molded resin portion 50 on the -z-axis side of the bearing
holder 52. At least one power supply lead (not illustrated)
for supplying power to the coils 30 is connected to the
circuit board 8. The circuit board 8 is fixed to the second
10 insulator 70 through winding terminals 7 connected to the
coils 30.
[0027]
As illustrated in FIGs. 1 and 3, the molded stator 5
further includes the first insulator 60 and second insulator
15 70, which are disposed between the coils 30 and the stator
core 20. The first insulator 60 and second insulator 70 are
made of, for example, thermoplastic resin. The molded stator
5 may be implemented such that it does not include the first
insulator 60 and second insulator 70.
20 [0028]
The first insulator 60 includes a first wall portion 61
as a first insulating portion, a second wall portion 62 as a
second insulating portion, and a connecting portion 63. The
first wall portion 61 covers end surfaces of the tooth tips
25 22b (see FIG. 2) of the teeth 22 on the +z-axis side,
thereby insulating the teeth 22. The first wall portion 61
extends in the z-axis direction.
[0029]
The first wall portion 61 includes inner surfaces 61a
30 facing the permanent magnet 12, and engagement portions 61b
provided in the inner surfaces 61a. The engagement portions
61b engage with the flux capture members 41. This
facilitates positioning of the flux capture members 41 in
molding of the molded resin portion 50. In the first

11
embodiment, the engagement portions 61b are, for example,
grooves (also referred to as “recesses”) obtained by cutting
end portions of the inner surfaces 61a on the -z-axis side,
and the flux capture members 41 are fitted in the grooves.
5 The engagement portions 61b may be grooves obtained by
recessing central portions of the inner surfaces 61a in the
z-axis direction. Also, the engagement portions 61b are not
limited to grooves. For example, the engagement portions 61b
may be projections that engage with recesses provided in the
10 flux capture members 41.
[0030]
The second wall portion 62 is located outward from the
first wall portion 61 in radial directions. The second wall
portion 62 covers an end surface of the yoke 21 on the +z15 axis side, thereby insulating the yoke 21. The second wall
portion 62 extends in the z-axis direction. When a length of
the second wall portion 62 in the z-axis direction is
denoted by L3, and a length of the first wall portion 61 in
the z-axis direction is denoted by L4, the length L3 is less
20 than the length L4. That is, the lengths L3 and L4 satisfy
the following formula (2):
L3 < L4. (2)
25 This can reduce the amount of resin used in the first
insulator 60.
[0031]
The connecting portion 63 connects the first wall
portion 61 and the second wall portion 62. The connecting
30 portion 63 extends in radial directions. The connecting
portion 63 insulates end surfaces of the tooth main bodies
22a (see FIG. 2) of the teeth 22 on the +z-axis side.
[0032]
The second insulator 70 includes a third wall portion

12
71 as a first insulating portion, a fourth wall portion 72
as a second insulating portion, and a connecting portion 73.
The third wall portion 71 insulates end surfaces of the
tooth tips 22b (see FIG. 2) on the -z-axis side. The third
5 wall portion 71 extends in the z-axis direction.
[0033]
The third wall portion 71 includes inner surfaces 71a
facing the permanent magnet 12, and engagement portions 71b
provided in the inner surfaces 71a. The engagement portions
10 71b engage with the flux capture members 42. This
facilitates positioning of the flux capture members 42 in
molding of the molded resin portion 50. In the first
embodiment, the engagement portions 71b are, for example,
grooves obtained by cutting end portions of the inner
15 surfaces 71a on the -z-axis side, and the flux capture
members 42 are fitted in the grooves. The engagement
portions 71b may be grooves obtained by recessing central
portions of the inner surfaces 71a in the z-axis direction.
Also, the engagement portions 71b are not limited to grooves.
20 For example, the engagement portions 71b may be projections
that engage with recesses provided in the flux capture
members 42. Also, resin layers made of the thermosetting
resin that is the material of the molded resin portion 50
may be disposed between the flux capture members 41 and 42
25 and the teeth 22 in the z-axis direction. Thus, the first
insulating portion insulating the teeth 22 may be
constituted by the insulator and the resin layers.
[0034]
The fourth wall portion 72 is located outward from the
30 third wall portion 71 in radial directions. The fourth wall
portion 72 insulates an end surface of the yoke 21 (see FIG.
2) on the -z-axis side. The fourth wall portion 72 extends
in the z-axis direction. The connecting portion 73 connects
the third wall portion 71 and the fourth wall portion 72.

13
The connecting portion 73 extends in radial directions. The
connecting portion 73 insulates end surfaces of the tooth
main bodies 22a (see FIG. 2) on the -z-axis side.
[0035]
5 Each coil 30 has a coil end portion 30a projecting from
the tooth 22 outward in the z-axis direction. A height A of
the coil end portion 30a in the z-axis direction decreases
inward in a radial direction from a leading end of the coil
end portion 30a. In the first embodiment, the height A of
10 the coil end portion 30a decreases inward from an outer end
of the coil end portion 30a in the radial direction. The
height A is a height of coils stacked on an end surface of
the tooth 22 in the z-axis direction by the coil 30 being
wound around the tooth 22. As described above, the first
15 wall portion 61 and third wall portion 71 respectively
include the engagement portions 61b and 71b, which engage
with the flux capture members 41 and 42. Thus, the first
wall portion 61 is lower in strength than the second wall
portion 62, and the third wall portion 71 is lower in
20 strength than the fourth wall portion 72. The height A of
the coil end portion 30a may be greatest at a central
portion of the coil end portion 30a in the radial direction,
and decrease inward or outward from the central portion in
the radial direction.
25 [0036]
When an operation (also referred to below as a “winding
operation”) of winding windings around the teeth 22 with the
first insulator 60 and second insulator 70 therebetween is
performed, stresses (also referred to below as “winding
30 stresses”) occur in the first insulator 60 and second
insulator 70 due to tensions of the windings acting on the
first insulator 60 and second insulator 70. In the first
embodiment, since the heights A of the coil end portions 30a
decrease inward from the leading ends of the coil end

14
portions 30a in the radial directions, the winding stress
occurring in the first wall portion 61 is less than the
winding stress occurring in the second wall portion 62. Also,
the winding stress occurring in the third wall portion 71 is
5 less than the winding stress occurring in the fourth wall
portion 72. Thus, the first wall portion 61 and third wall
portion 71 can be prevented from being deformed by the
winding stresses. Specifically, the first wall portion 61
and third wall portion 71 can be prevented from being
10 inclined toward the permanent magnet 12 by the winding
stresses.
[0037]
FIG. 4 is a plan view illustrating part of the
configuration of the molded stator 5 illustrated in FIG. 1.
15 As illustrated in FIGs. 1 and 4, the motor 100 further
includes the winding terminals 7 connected to the coils 30.
The winding terminals 7 are inserted in terminal insertion
holes (not illustrated) provided in the circuit board 8 (see
FIG. 1).
20 [0038]
The winding terminals 7 are fixed to the fourth wall
portion 72. As described above, the third wall portion 71
having the engagement portions 71b is lower in strength than
the fourth wall portion 72. Thus, by virtue of the winding
25 terminals 7 being fixed to the fourth wall portion 72, the
winding terminals 7 can be fixed sufficiently firmly.
[0039]
As illustrated in FIG. 4, the molded stator 5 further
includes a crossover wire 31 connecting two coils 30
30 adjacent in the circumferential direction R. Specifically,
the molded stator 5 includes a crossover wire 31 connecting
coils 30 of the same phase (e.g., U phase) adjacent to each
other in the circumferential direction R. The crossover wire
31 is guided by the fourth wall portion 72, which is higher

15
in strength than the third wall portion 71. Specifically,
the crossover wire 31 extends along a surface of the fourth
wall portion 72 facing outward in radial directions. As
above, in the example illustrated in FIG. 4, since the
5 crossover wire 31 is not guided by the third wall portion 71,
the crossover wire 31 is not in contact with the third wall
portion 71. Thereby, the third wall portion 71 can be
prevented from being deformed by the crossover wire 31.
Specifically, the third wall portion 71 can be prevented
10 from being inclined toward the permanent magnet 12 by the
crossover wire 31.
[0040]

In the first embodiment described above, the motor 100
15 includes the permanent magnet 12 as a rotor main body having
the first end surface 12a that is one end surface in the zaxis direction and the second end surface 12b that is the
other end surface, and the molded stator 5. The molded
stator 5 includes the stator core 20, and the length L1 of
20 the stator core 20 in the z-axis direction is less than the
length L2 of the permanent magnet 12 in the z-axis direction.
Thereby, since the number of electromagnetic steel sheets
used in the stator core 20 is reduced, the cost of the
molded stator 5 can be reduced. Thus, the cost of the motor
25 100 can be reduced.
[0041]
Also, in the first embodiment, the motor 100 includes
the flux capture members 41 disposed on the first end
surface 22c of the stator core 20 and made of magnetic
30 material, the flux capture members 41 capturing the magnetic
flux of the permanent magnet 12. Thereby, the magnetic flux
generated from the end portion of the permanent magnet 12 on
the +z-axis side that does not face the stator core 20 in
radial directions flows to the stator core 20 and coils 30

16
through the flux capture members 41. Thus, the reduction in
the amount of magnetic flux flowing from the permanent
magnet 12 of the rotor 1 to the molded stator 5 can be
reduced. Thus, in the motor 100, it is possible to reduce
5 the reduction in the amount of magnetic flux flowing from
the permanent magnet 12 to the molded stator 5 while saving
the cost.
[0042]
Also, in the first embodiment, the motor 100 further
10 includes the flux capture members 42 disposed on the second
end surface 22d of the stator core 20 and made of magnetic
material that captures the magnetic flux of the permanent
magnet 12. Thereby, the magnetic flux generated from the end
portion of the permanent magnet 12 on the -z-axis side that
15 does not face the stator core 20 in radial directions flows
to the stator core 20 and coils 30 through the flux capture
members 41. Thus, it is possible to further reduce the
reduction in the amount of magnetic flux flowing from the
permanent magnet 12 to the molded stator 5.
20 [0043]
Also, in the first embodiment, the flux capture members
41 and 42 and stator core 20 are covered by the molded resin
portion 50. Thereby, no fasteners for mounting the flux
capture members 41 and 42 to the stator core 20 are required.
25 Thus, it is possible to reduce the number of parts of the
motor 100, and simplify the assembly process of the motor
100.
[0044]
Also, in the first embodiment, the flux capture members
30 41 and 42 are disposed on the teeth 22 of the stator core 20.
Thus, since the flux capture members 41 and 42 are located
close to the permanent magnet 12, the magnetic flux of the
permanent magnet 12 is easily captured by the flux capture
members 41 and 42.

17
[0045]
Also, in the first embodiment, the molded stator 5
includes the first wall portion 61 of the first insulator 60
that insulates the first end surfaces 22c of the teeth 22 on
5 the +z-axis side, and the first wall portion 61 includes the
engagement portions 61b that engage with the flux capture
members 41. This facilitates positioning of the flux capture
members 41 in molding of the molded resin portion 50.
[0046]
10 Also, in the first embodiment, the molded stator 5
includes the third wall portion 71 of the second insulator
70 that insulates the second end surfaces 22d of the teeth
22 on the -z-axis side, and the third wall portion 71
includes the engagement portions 71b that engage with the
15 flux capture members 42. This facilitates positioning of the
flux capture members 42 in molding of the molded resin
portion 50.
[0047]
Also, in the first embodiment, the length L3 of the
20 second wall portion 62, which insulates the yoke 21, of the
first insulator 60 in the z-axis direction is less than the
length L4 of the first wall portion 61, which supports the
flux capture members 41, in the z-axis direction. This can
reduce the amount of resin used in the first insulator 60.
25 [0048]
Also, in the first embodiment, the molded stator 5
includes the coils 30 wound around the teeth 22 with the
first insulator 60 and second insulator 70 therebetween, and
the height A of the coil end portion 30a of each coil 30
30 decreases inward in a radial direction from the leading end
of the coil end portion 30a. This reduces the winding
stresses acting on the first wall portion 61 and third wall
portion 71 during the winding operation, which can reduce
deformation of the first wall portion 61 and third wall

18
portion 71 due to the winding stresses.
[0049]
Also, in the first embodiment, the motor 100 includes
the winding terminals 7 connected to the coils 30, and the
5 winding terminals 7 is fixed to the fourth wall portion 72
having a strength higher than that of the third wall portion
71. Thereby, the winding terminals 7 can be fixed
sufficiently firmly.
[0050]
10 Also, in the first embodiment, the molded stator 5
further includes the crossover wire 31 connecting adjacent
two of the multiple coils 30, and the crossover wire 31 is
guided by the fourth wall portion 72. Thereby, since the
crossover wire 31 is not in contact with the third wall
15 portion 71, the third wall portion 71 can be prevented from
being deformed by the crossover wire 31.
[0051]
<>
FIG. 5 is a sectional view illustrating a configuration
20 of a motor 200 according to a second embodiment. In FIG. 5,
elements that are the same as or correspond to those
illustrated in FIG. 1 are given reference characters that
are the same as those shown in FIG. 1. A molded stator 205
of the motor 200 according to the second embodiment is
25 different from the motor 100 according to the first
embodiment in that it does not include the flux capture
members 42. Otherwise, the motor 200 according to the second
embodiment is the same as the motor 100 according to the
first embodiment. Thus, the following description refers to
30 FIG. 2.
[0052]
As illustrated in FIG. 5, the motor 200 includes a
rotor 1 and the molded stator 205. The molded stator 205
includes a stator core 20, multiple coils 30, flux capture

19
members 41, and a molded resin portion 250. In the second
embodiment, since the flux capture members provided in the
molded stator 205 are only the flux capture members 41, the
number of parts of the motor 200 is reduced, and the
5 assembly process of the motor 200 can be simplified.
[0053]
The molded stator 205 further includes a first
insulator 60 and a second insulator 270. The second
insulator 270 includes a third wall portion 271.
10 [0054]
The third wall portion 271 insulates end surfaces of
tooth tips 22b (see FIG. 2) on the -z-axis side. The third
wall portion 271 extends in the z-axis direction. When a
thickness of the third wall portion 271 in radial directions
15 is denoted by W1, and a thickness in radial directions of a
vertical portion 61c of a first wall portion 61 extending in
the z-axis direction is denoted by W2, the thickness W1 is
greater than the thickness W2. That is, the thicknesses W1
and W2 satisfy the following formula (3):
20
W1 > W2. (3)
This is because in the second embodiment, no engagement
portions (e.g., the engagement portions 71b illustrated in
25 FIG. 1 described above) engaging with flux capture members
are formed in the third wall portion 271.
[0055]
By virtue of the thicknesses W1 and W2 satisfying
formula (3), the third wall portion 271 is higher in
30 strength than the first wall portion 61. Thus, the winding
stress during the winding operation can be received by the
third wall portion 271, and deformation of the first wall
portion 61 by the winding stress can be reduced. In the
motor 200, a distance between the shaft 11 and a surface of

20
the third wall portion 271 facing outward in radial
directions (or an outer diameter of the third wall portion
271) may be greater than a distance between the shaft 11 and
a surface of the first wall portion 61 facing outward in
5 radial directions (or an outer diameter of the first wall
portion 61). Also in this case, deformation of the first
wall portion 61 by the winding stress can be reduced.
[0056]
In the motor 200, a flux capture member 41 is disposed
10 on a first end surface 22c (see FIG. 2) of each of multiple
teeth 22. Two flux capture members 41 adjacent in the
circumferential direction R are not connected together. Thus,
while the motor 200 is rotating, the flux capture members 41
may be vibrated by the magnetic force of the permanent
15 magnet 12 acting on the flux capture members 41.
[0057]
In the molded resin portion 250, when a thickness of a
portion between a surface of the first wall portion 61
facing outward in radial directions and an outer periphery
20 253 of the molded resin portion 250 is denoted by W3, and a
thickness of a portion between a surface of the stator core
20 facing outward in radial directions and the outer
periphery 253 of the molded resin portion 250 is denoted by
W4, the thickness W3 is greater than the thickness W4. That
25 is, the thicknesses W3 and W4 satisfy the following formula
(4):
W3 > W4. (4)
30 Thereby, even when the magnetic force of the permanent
magnet 12 acts on the flux capture members 41 while the
motor 200 is rotating, since a resin portion of the molded
resin portion 250 surrounding the flux capture members 41 is
thick, the resin portion has high stiffness. This can reduce

21
vibration of the flux capture members 41 during rotation of
the motor 200.
[0058]
The molded resin portion 250 includes a first resin
5 portion 291 and a second resin portion 292. The first resin
portion 291 covers a portion on the flux capture member 41
side of a plane V including an end surface 20a of the stator
core 20 on the +z-axis side (or the first end surfaces 22c
of the teeth 22 illustrated in FIG. 3). The second resin
10 portion 292 covers a portion on the stator core 20 side of
the plane V.
[0059]
When a distance between the axis C and an outer
periphery 291c of the first resin portion 291 is denoted by
15 D1, and a distance between the axis C and an outer periphery
292c of the second resin portion 292 is denoted by D2, the
distance D1 is less than the distance D2. That is, the
distances D1 and D2 satisfy the following formula (5):
20 D1 < D2. (5)
This can reduce the amount of resin used in the first
resin portion 291.
[0060]
25 While the motor 200 is rotating, magnetic attractive
force acts between the permanent magnet 12 and the flux
capture members 41 and between the permanent magnet 12 and
the stator core 20. The magnetic attractive force between
the permanent magnet 12 and the flux capture members 41 is
30 smaller than the magnetic attractive force between the
permanent magnet 12 and the stator core 20. In the example
illustrated in FIG. 5, the metal bracket 4 is fixed to the
first resin portion 291 covering the flux capture members 41.
Thus, compared to a configuration in which the metal bracket

22
is fixed to the second resin portion, the metal bracket 4
can be prevented from coming off due to the magnetic
attractive force.
[0061]
5 The molded stator 205 further includes a mounting
portion 255 extending outward in radial directions from the
outer periphery 253 of the molded resin portion 250. The
mounting portion 255 is mounted to a support of an object
(e.g., a motor support provided in an outdoor unit) to which
10 the motor 200 is mounted. The mounting portion 255 has
insertion holes 255a in which fasteners (e.g., bolts) are
inserted.
[0062]
In the second embodiment, the mounting portion 255 is
15 provided in the second resin portion 292 of the molded resin
portion 250. As described above, the second resin portion
292 covers the stator core 20, which is heavy in weight.
Thus, by virtue of the mounting portion 255 being provided
in the second resin portion 292, the motor 200 can be fixed
20 to the mounting object sufficiently firmly.
[0063]

In the second embodiment described above, the flux
capture members provided in the molded stator 205 of the
25 motor 200 are only the flux capture members 41. This can
reduce the number of parts constituting the motor 200, and
simplify the assembly process of the motor 200.
[0064]
Also, in the second embodiment, when the thickness of
30 the third wall portion 271 in radial directions is denoted
by W1, and the thickness of the vertical portion 61c of the
first wall portion 61 in radial directions is denoted by W2,
the thickness W1 is greater than the thickness W2. Thus, the
third wall portion 271 is higher in strength than the first

23
wall portion 61. Thus, the winding stress during the winding
operation can be received by the third wall portion 271, and
deformation of the first wall portion 61 by the winding
stress can be reduced.
5 [0065]
Also, in the second embodiment, in the molded resin
portion 250, when the thickness of the portion between the
surface of the first wall portion 61 facing outward in
radial directions and the outer periphery 253 of the molded
10 resin portion 250 is denoted by W3, and the thickness of the
portion between the surface of the stator core 20 facing
outward in radial directions and the outer periphery 253 of
the molded resin portion 250 is denoted by W4, the thickness
W3 is greater than the thickness W4. Thereby, even when the
15 magnetic force of the permanent magnet 12 acts on the flux
capture members 41 while the motor 200 is rotating, since
the resin portion surrounding the flux capture members 41 is
thick, the resin portion has high stiffness. This can reduce
vibration of the flux capture members 41 during rotation of
20 the motor 200.
[0066]
Also, in the second embodiment, the molded resin
portion 250 includes the first resin portion 291 covering
the portion on the flux capture member 41 side of the plane
25 V including the end surface 20a of the stator core 20 on the
+z-axis side, and the second resin portion 292 covering the
portion on the stator core 20 side of the plane V. The
distance D1 between the axis C and the outer periphery 291c
of the first resin portion 291 is less than the distance D2
30 between the axis C and the outer periphery 292c of the
second resin portion 292. This can reduce the amount of
resin used in the first resin portion 291.
[0067]
Also, in the second embodiment, the metal bracket 4 is

24
fixed to the first resin portion 291. While the motor 200 is
rotating, magnetic attractive force acts between the
permanent magnet 12 and the flux capture members 41 and
between the permanent magnet 12 and the stator core 20. In
5 the second embodiment, the magnetic attractive force between
the permanent magnet 12 and the flux capture members 41 is
smaller than the magnetic attractive force between the
permanent magnet 12 and the stator core 20. Thus, the metal
bracket 4 can be prevented from coming off due to the
10 magnetic attractive force.
[0068]
Also, in the second embodiment, the motor 200 further
includes the mounting portion 255 mounted to a mounting
object, and the mounting portion 255 is provided in the
15 second resin portion 292 of the molded resin portion 250.
Since the second resin portion 292 covers the stator core 20,
which is heavy in weight, by the mounting portion 255 being
provided in the second resin portion 292, the motor 200 can
be fixed to the mounting object sufficiently firmly.
20 [0069]
<>
FIG. 6 is a sectional view illustrating a configuration
of a motor 200a according to a first modification of the
second embodiment. In FIG. 6, elements that are the same as
25 or correspond to those illustrated in FIG. 5 are given
reference characters that are the same as those shown in FIG.
5. The motor 200a according to the first modification of the
second embodiment is different from the motor 200 according
to the second embodiment in the shape of a molded resin
30 portion 250a and the shape of a first insulator 260a.
Otherwise, the motor 200a according to the first
modification of the second embodiment is the same as the
motor 200 according to the second embodiment. Thus, the
following description refers to FIG. 5.

25
[0070]
As illustrated in FIG. 6, the motor 200a includes a
rotor 1 and a molded stator 205a. The molded stator 205a
includes a stator core 20, multiple coils 30, flux capture
5 members 41, and the molded resin portion 250a.
[0071]
The molded resin portion 250a includes a first resin
portion 291a covering a portion on the flux capture member
41 side of a plane V including an end surface 20a of the
10 stator core 20 on the +z-axis side, and a second resin
portion 292a covering a portion on the stator core 20 side
of the plane V. When a distance between the axis C and an
outer periphery 291c of the first resin portion 291a is
denoted by D11, and a distance between the axis C and an
15 outer periphery 292c of the second resin portion 292a is
denoted by D12, the distance D11 is greater than the distance
D12. That is, the distances D11 and D12 satisfy the following
formula (6):
20 D11 > D12. (6)
Thereby, since a resin portion of the molded resin
portion 250a surrounding the flux capture members 41 is
thicker in radial directions, the resin portion has higher
25 stiffness. This can further reduce vibration of the flux
capture members 41 during rotation of the motor 200a.
[0072]
The molded stator 205a further includes the first
insulator 260a and a second insulator 270a.
30 [0073]
The first insulator 260a includes a first wall portion
261a. The first wall portion 261 insulates end surfaces of
tooth tips 22b (see FIG. 2) of teeth 22 on the +z-axis side.
The first wall portion 261 extends in the z-axis direction.

26
[0074]
The second insulator 270a includes a third wall portion
271a. The third wall portion 271a insulates end surfaces of
the tooth tips 22b (see FIG. 2) of the teeth 22 on the -z5 axis side. The third wall portion 271a extends in the z-axis
direction.
[0075]
When a length of the third wall portion 271a in the zaxis direction is denoted by L5, and a length of the first
10 wall portion 61 in the z-axis direction is denoted by L6, the
length L5 is less than the length L6. That is, the lengths L5
and L6 satisfy the following formula (7):
L5 < L6. (7)
15
[0076]
Here, a winding operation of winding windings around
the teeth 22 (see FIG. 2) with the first insulator 260a and
second insulator 270a therebetween is performed by using a
20 nozzle winding machine. During the winding operation, a
nozzle of the nozzle winding machine circles on the outer
side of the first wall portion 261a of the first insulator
260a and the third wall portion 271a of the second insulator
270a in radial directions. By virtue of the length L5 of the
25 third wall portion 271a in the z-axis direction being less
than the length L6 of the first wall portion 261a in the zaxis direction, the radius of rotation of the nozzle can be
reduced. Thus, since the nozzle can be made closer to the
teeth 22, winding disorder of the windings during the
30 winding operation can be reduced.
[0077]
Also, when the nozzle winding machine includes a former
that is a winding guide for guiding the windings supplied
from the nozzle to the slots 23 (see FIG. 2), by virtue of

27
the length L5 being less than the length L6, an inner
diameter of the former can be reduced. Thus, the former can
be downsized. Also, by virtue of the former being downsized,
since the former can be made closer to the teeth 22 in the
5 winding operation, winding disorder of the windings during
the winding operation can be reduced.
[0078]

In the first modification of the second embodiment
10 described above, the distance D11 between the axis C and the
outer periphery 291c of the first resin portion 291a is
greater than the distance D12 between the axis C and the
outer periphery 292c of the second resin portion 292a. That
is, in the first modification of the second embodiment, the
15 first resin portion 291a is thicker than the second resin
portion 292a in radial directions. Thereby, since the resin
portion of the molded resin portion 250a surrounding the
flux capture members 41 is thicker in radial directions, the
resin portion has higher stiffness. This can further reduce
20 vibration of the flux capture members 41 during rotation of
the motor 200a.
[0079]
Also, in the first modification of the second
embodiment, the length L5 of the third wall portion 271a in
25 the z-axis direction is less than the length L6 of the first
wall portion 261a in the z-axis direction. This makes it
possible to reduce the radius of rotation of a nozzle that
circles on the outer side of the first wall portion 261a and
third wall portion 271a in radial directions during the
30 winding operation. Thus, since the nozzle can be made closer
to the teeth 22, winding disorder of the windings during the
winding operation can be reduced. Also, by virtue of the
length L5 of the third wall portion 271a in the z-axis
direction being less than the length L6 of the first wall

28
portion 261a in the z-axis direction, the former of the
nozzle winding machine can be downsized. Also, by virtue of
the former being downsized, since the former can be made
closer to the teeth 22, winding disorder of the windings
5 during the winding operation can be reduced.
[0080]
<>
FIG. 7 is a sectional view illustrating a configuration
of a motor 200b according to a second modification of the
10 second embodiment. In FIG. 7, elements that are the same as
or correspond to those illustrated in FIG. 5 are given
reference characters that are the same as those shown in FIG.
5. The motor 200b according to the second modification of
the second embodiment is different from the motor 200
15 according to the second embodiment in that it does not
include the circuit board 8 and further includes a second
metal bracket 209. Otherwise, the motor 200b according to
the second modification of the second embodiment is
different from the motor 200 according to the second
20 embodiment.
[0081]
As illustrated in FIG. 7, the motor 200b includes a
rotor 1, a bearing 2, a bearing 3, a first metal bracket 4
as a first bearing holder, a molded stator 205b, and the
25 second metal bracket 209 as a second bearing holder. The
molded stator 205b includes a stator core 20, multiple coils
30, flux capture members 41, and a molded resin portion 250b.
The molded resin portion 250b has a first opening 51 in
which the first metal bracket 4 is fixed, and a second
30 opening 53 in which the second metal bracket 209 is fixed.
[0082]
The second metal bracket 209 is a bearing holder that
holds the bearing 3. The second metal bracket 209 is formed
from, for example, a steel sheet. As above, by virtue of the

29
motor 200b having the second metal bracket 209, since no
bearing holder for holding the bearing 3 need be provided in
the molded resin portion 250b, the amount of resin used in
the molded resin portion 250b can be reduced.
5 [0083]
The second metal bracket 209 includes a cylindrical
portion 209a, a flange portion 209b, and a fixing portion
209c. The cylindrical portion 209a is a portion of the
second metal bracket 209 that holds the bearing 3. The
10 flange portion 209b extends outward in radial directions
from an end portion of the load side of the cylindrical
portion 209a. The fixing portion 209c is a portion of the
second metal bracket 209 that is fixed in the second opening
53 of the molded resin portion 250b. The fixing portion 209c
15 is fixed in the second opening 53 by, for example, press
fitting.
[0084]
The motor 200b further includes a winding terminal 7b
that is connected to the coils 30 and fixed to a second
20 insulator 270. A tip of the winding terminal 7b projects
from an outer periphery 253 of the molded resin portion 250b.
This allows the winding terminal 7b to be connected to a
circuit board (not illustrated) provided outside the motor
200b. The tip of the winding terminal 7b may project from a
25 bottom surface of the molded resin portion 250b.
[0085]

In the second modification of the second embodiment
described above, the motor 200b includes the molded stator
30 205b including the molded resin portion 250b, the bearing 3
that supports the anti-load side of the shaft 11, and the
second metal bracket 209 that holds the bearing 3. The
second metal bracket 209 is fixed to the molded resin
portion 250b. Thereby, since no bearing holder for holding

30
the bearing 3 need be provided in the molded resin portion
250b, the amount of resin used in the molded resin portion
250b can be reduced.
[0086]
5 <>
FIG. 8 is a sectional view illustrating a configuration
of a motor 200c according to a third modification of the
second embodiment. In FIG. 8, elements that are the same as
or correspond to those illustrated in FIG. 5 are given
10 reference characters that are the same as those shown in FIG.
5. The motor 200c according to the third modification of the
second embodiment is different from the motor 200 according
to the second embodiment in the shape of a molded resin
portion 250c, the shape of a first metal bracket 204, and
15 the shape of a second metal bracket 209. Otherwise, the
motor 200c according to the third modification of the second
embodiment is the same as the motor 200 according to the
second embodiment.
[0087]
20 As illustrated in FIG. 8, the motor 200c includes a
rotor 1, a bearing 2, a bearing 3, the first metal bracket
204, a molded stator 205c, and the second metal bracket 209.
The molded stator 205c includes a stator core 20, multiple
coils 30, flux capture members 41, and the molded resin
25 portion 250c. The molded resin portion 250c has a first
opening 51 in which the first metal bracket 204 is fixed,
and a second opening 53 in which a circuit board 8 is
disposed.
[0088]
30 The first metal bracket 204 includes a cylindrical
portion 204a and a flange portion 204b. The cylindrical
portion 204a is a portion of the first metal bracket 204
that holds the bearing 2. The flange portion 204b extends
outward in radial directions from an end portion of the

31
cylindrical portion 204a on the anti-load side.
[0089]
A tip of the flange portion 204b of the first metal
bracket 204 is covered by the molded resin portion 250c.
5 Thus, the tip of the flange portion 204b is embedded in a
groove 51c provided in the first opening 51. This is because
in the third modification of the second embodiment, when the
molded resin portion 250c is molded, the first metal bracket
204 is placed in a mold, and molding of the molded resin
10 portion 250c and fixation of the first metal bracket 204 to
the molded resin portion 250c are simultaneously performed.
[0090]
Thus, since the assembly process of the motor 200c does
not require a step of press-fitting the first metal bracket
15 204 into the molded resin portion 250c, the assembly process
of the motor 200c can be simplified. It is sufficient that
the molded resin portion 250c cover at least part (in the
example illustrated in FIG. 8, the tip of the flange portion
204b) of the first metal bracket 204. For example, the
20 molded resin portion 250c may cover the whole of the first
metal bracket 204.
[0091]
In the third modification of the second embodiment, a
flange portion 209b of the second metal bracket 209 extends
25 outward in radial directions from an end portion of a
cylindrical portion 209a on the anti-load side. Also, a
fixing portion 209c of the second metal bracket 209 is fixed
to an outer periphery 253 of the molded resin portion 250c.
The fixing portion 209c is fixed to the outer periphery 253
30 by, for example, press fitting.
[0092]
The molded stator 205c further includes a winding
terminal 7c fixed to a second insulator 270, and the circuit
board 8 connected to the winding terminal 7c. The circuit

32
board 8 includes a hollow portion 8a in which a shaft 11 and
the cylindrical portion 209a of the second metal bracket 209
are inserted.
[0093]
5
In the third modification of the second embodiment
described above, the molded resin portion 250c covers at
least part (in the example illustrated in FIG. 8, the tip of
the flange portion 204b) of the first metal bracket 204
10 holding the bearing 2. Thus, since the assembly process of
the motor 200c does not require a step of press-fitting the
first metal bracket 204 into the molded resin portion 250c,
the assembly process of the motor 200c can be simplified.
Reference Signs List
15 [0094]
2,3 bearing, 4, 204 first metal bracket, 5, 205, 205a,
205b, 205c molded stator, 7, 7b, 7c winding terminal, 12
permanent magnet, 20 stator core, 21 yoke, 22 tooth, 22c
first end surface, 22d second end surface, 30 coil, 31
20 crossover wire, 41, 42 flux capture member, 50, 250, 250a,
250b, 250c molded resin portion, 60, 260a first insulator,
61, 261a first wall portion, 61b engagement portion, 62
second wall portion, 70, 270, 270a second insulator, 71, 271,
271a third wall portion, 71b engagement portion, 72 fourth
25 wall portion, 100, 200, 200a, 200b, 200c motor, 209 second
metal bracket, 253, 291c, 292c outer periphery, 255 mounting
portion, 291 first resin portion, 292 second resin portion,
A height, D1, D2, D11, D12 distance, L1, L2, L3, L4, L5, L6
length, W1, W2, W3, W4 thickness.
30

33
We Claim:
1. A motor comprising:
a rotor main body supported by a rotary shaft; and
5 a stator,
wherein the stator includes:
a stator core having a first end surface that is
one end surface in an axial direction of the rotary shaft,
and a second end surface that is another end surface in the
10 axial direction, a length of the stator core in the axial
direction being less than a length of the rotor main body in
the axial direction;
at least one flux capture member disposed on at
least one of the first end surface and the second end
15 surface and made of magnetic material, the at least one flux
capture member capturing a magnetic flux of the rotor main
body; and
a molded resin portion covering the at least one
flux capture member and the stator core.
20
2. The motor of claim 1, wherein the at least one flux
capture member is disposed on a tooth of the stator core.
3. The motor of claim 2, wherein
25 the stator further includes a first insulating portion
insulating the tooth, and
the first insulating portion has an engagement portion
engaging with the at least one flux capture member.
30 4. The motor of claim 3, wherein
the stator further includes a coil wound around the
tooth with the first insulating portion therebetween,
the coil has a coil end portion projecting from the
tooth in the axial direction, and

34
a height of the coil end portion in the axial direction
decreases inward in a radial direction of the stator from a
leading end of the coil end portion.
5 5. The motor of claim 4, wherein
the stator further includes a winding terminal
connected to the coil, and a second insulating portion
insulating a yoke of the stator core, and
the winding terminal is fixed to the second insulating
10 portion.
6. The motor of claim 3, wherein
the stator further includes a plurality of coils, a
crossover wire connecting adjacent two of the plurality of
15 coils, and a second insulating portion insulating a yoke of
the stator core, and
the crossover wire is guided by the second insulating
portion.
20 7. The motor of claim 1, wherein
the stator further includes a first insulator,
the first insulator includes:
a first wall portion insulating one end surface of
a tooth of the stator core in the axial direction and
25 supporting the at least one flux capture member; and
a second wall portion insulating one end surface
of a yoke of the stator core in the axial direction, and
a length of the second wall portion in the axial
direction is less than a length of the first wall portion in
30 the axial direction.
8. The motor of claim 7, wherein
the stator further includes a second insulator,
the second insulator includes a third wall portion

35
covering another end surface of the tooth in the axial
direction,
the first wall portion includes a vertical portion
extending in the axial direction, and
5 W1 > W2, where W1 is a thickness of the third wall
portion in a radial direction of the stator, and W2 is a
thickness of the vertical portion in the radial direction.
9. The motor of claim 8, wherein a length of the third
10 wall portion in the axial direction is less than a length of
the first wall portion in the axial direction.
10. The motor of any one of claims 3 to 6, wherein W3 > W4,
where W3 is a thickness of a portion of the molded resin
15 portion between a surface of the first insulating portion
facing outward in a radial direction of the stator and an
outer periphery of the molded resin portion, and W4 is a
thickness of a portion of the molded resin portion between a
surface of the stator core facing outward in the radial
20 direction and the outer periphery.
11. The motor of any one of claims 1 to 10, wherein
the at least one flux capture member is disposed on the
first end surface,
25 the molded resin portion includes:
a first resin portion covering a portion of the
stator on the flux capture member side of a plane including
the first end surface; and
a second resin portion covering a portion of the
30 stator on the stator core side of the plane, and
D1 < D2, where D1 is a distance between the rotary shaft
and an outer periphery of the first resin portion, and D2 is
a distance between the rotary shaft and an outer periphery
of the second resin portion.

36
12. The motor of claim 11, wherein
the stator further includes a mounting portion mounted
to a mounting object, and
5 the mounting portion is provided in the second resin
portion.
13. The motor of any one of claims 1 to 10, wherein
the at least one flux capture member is disposed on the
10 first end surface,
the molded resin portion includes:
a first resin portion covering a portion of the
stator on the flux capture member side of a plane including
the first end surface; and
15 a second resin portion covering a portion of the
stator on the stator core side of the plane, and
D11 > D12, where D11 is a distance between the rotary
shaft and an outer periphery of the first resin portion, and
D12 is a distance between the rotary shaft and an outer
20 periphery of the second resin portion.
14. The motor of any one of claims 11 to 13, further
comprising:
a first bearing supporting a load side of the rotary
25 shaft; and
a first bearing holder fixed to the molded resin
portion and holding the first bearing.
15. The motor of claim 14, wherein the first bearing holder
30 is fixed to the first resin portion.
16. The motor of claim 14 or 15, wherein the molded resin
portion covers at least part of the first bearing holder.

37
17. The motor of any one of claims 14 to 16, further
comprising:
a second bearing supporting an anti-load side of the
rotary shaft; and
5 a second bearing holder fixed to the molded resin
portion and holding the second bearing.
18. The motor of any one of claims 1 to 17, wherein the at
least one flux capture member is disposed on both the first
10 end surface and the second end surface.
19. The motor of any one of claims 1 to 18, wherein the at
least one flux capture member is made of metal.