Claims:We claim:
1. A submersible motor with integrated capacitor comprises of; a
tubular housing; a stator coaxially positioned inside said tubular
housing; an inner pipe coaxially placed inside said stator and
extended from both ends to enclose the stator and defining the
annular chamber at top and bottom of the said stator; A capacitor
placed in said annular chamber and rest on a support ring; A lower
and upper flange closing the said annular chamber at top and bottom
of the tubular housing; A potting compound filled in the said annular
chamber; A rotor placed inside said inner pipe rotatably supported
by a bearing positioned inside an top end bell and bottom end bell
wherein said end bells further supported by lower and upper flange.
2. The submersible motor with integrated capacitor as claimed in claim
1, wherein outer curved surface of the inner pipe partially adjoining
inner surface of the stator.
3. The submersible motor with integrated capacitor as claimed in claim
1, wherein said inner pipe further comprises of lower inner pipe and
upper inner pipe, moreover said lower inner pipe and upper inner
pipe interconnected through said support ring.
4. The submersible motor with integrated capacitor as claimed in claim
1, wherein said support ring further comprises of lower support
ring and upper support ring, wherein said lower support ring and
9
upper support ring have provision to adapt lower inner pipe and
upper inner pipe consecutively on their inner peripheral surface.
5. The submersible motor with integrated capacitor as claimed in claim
1, wherein according to one of the embodiment of the invention said
lower inner pipe and upper inner pipe are integral part.
6. The submersible motor with integrated capacitor as claimed in claim
1, wherein according to one of the embodiment of the invention said
lower support ring and upper support ring are integral part.
7. The submersible motor with integrated capacitor as claimed in claim
1, wherein said inner pipe extended ahead of the support ring have
smaller outer diameter.
8. The submersible motor with integrated capacitor as claimed in claim
1 and 3 substantially as described with reference to accompanying
drawing wherein said lower inner pipe, upper inner pipe and support
ring are integral part.
9. The submersible motor with integrated capacitor as claimed in claim
1 to 8 substantially as described with reference to accompanying
drawing. , Description:Field of the invention
The present invention relates to a motor, more particularly it relates to a
development of submersible single phase induction motor with integrated
capacitor.
Background of the invention
The single phase induction motors are not self starting inherently, it
requires auxiliary winding and/or some external means to start the motor,
and these external means may be a capacitor or switches. These switches
are costly and have complicated to design, meanwhile capacitors are easily
available and have cost effective. Hence in single phase induction motors
capacitor are most widely used to start the motor.
In surface motor capacitor can easily be implant on motor, while in
submersible motor capacitor implantation is challenging task due to
limited size of bore well, and hence it’s very difficult to implant capacitor
on a motor, and it is furthermore difficult to implant capacitor inside the
motor due to compact design.
Moreover capacitor installation outside the bore well requires additional
control panel setup and additional wire connection from controller to
motor, which increases the overall cost of the system. Many attempts have
been made to solve the above intended problem described in prior arts
below.
Such a motor with a built-in capacitor is disclosed in US5548169, Wherein
capacitor is formed into a ring so that a shaft of the motor penetrates a
centre portion of the capacitor and is disposed in the motor so that the shaft

of the motor penetrates the centre portion. The capacitor is mounted at the
same time as the motor is mounted and the mounting work of the capacitor
is easy. The external shape of the motor itself is the same as that of a
conventional motor. The whole structure of the motor is compact as
compared with the conventional motor. The motor can be applied to a
motor with a capacitor directly connected to a gear mechanism such as a
transmission.
Such a motor disclosed in US 6359353 B1, wherein a submersible motor
unit is used to drive a pump and is submerged with the pump in liquid
(water). The motor unit includes a tubular housing member and a tubular
inner member which is enclosed by and disposed in a coaxial relationship
with the tubular housing member. A stator is disposed in a stator chamber
formed between the tubular inner member and the tubular housing
member. A rotor is disposed in a rotor chamber disposed within the inner
member. End walls close opposite ends of the tubular housing member and
the tubular inner member. An annular capacitor is disposed in the stator
chamber in an axially spaced apart relationship with the stator. The
capacitor extends around the rotor chamber. A body of potting compound
is disposed in the stator chamber and at least partially encloses the stator
and the capacitor.
Such a motor disclosed in US 7215051B2, wherein a single-phase motor
(10) particularly for submersed pumps, characterized in that it comprises
an annular capacitor (14) interposed between the pump coupling head (15)
and the stator winding pack (12).

Many of these units in prior arts are workable for the purpose intended.
However, most of them are complicated from production point of view and
few of them are simple enough to be practical from a commercial
standpoint but not cost effective and hence submersible single phase
induction motor demands the scope of the invention.
Objects of the Invention
It is an object of the present invention is to provide a submersible single
phase induction motor with integrated capacitor.
It is another object of the present invention is to eliminate control panel for
submersible single phase induction motor.
It is further object of the present invention is to provide a submersible
single phase induction motor which is easy to install.
It is still further object of the present invention, is to provide compact
design and reduce overall cost of the product.
Summary of the Invention
The present invention relates to development of submersible single phase
induction motor with integrated capacitor, the aim of the present invention
is to eliminate capacitor integrated control panel and introduce a motor
with integrated capacitor to save cost of control panel and connection wire.
A submersible motor 01 with integrated capacitor comprises of; a tubular
housing 02; a stator 03 positioned inside said tubular housing; an inner

pipe 04 placed inside said stator and defining the annular chamber 05 at
top and bottom of the said stator; A capacitor 06 placed in said annular
chamber and rest on a support ring 07; A lower and upper flange (08,09)
closing the said annular chamber at top and bottom of the tubular housing;
A potting compound 10 filled in the said annular chamber; A rotor 11
placed inside said inner pipe rotatably supported by a bearing 12
positioned inside an top end bell 13 and bottom end bell 14 wherein said
end bells further supported by lower and upper flange.
Brief Description of Drawings
Further characteristics and advantages of the invention will become better
apparent from the description of a preferred but not exclusive embodiment
thereof, illustrated only by way of non-limitative example in the
accompanying drawings, wherein:
Figure 1 - Illustrates cross sectional view of present discloser.
Figure 2 - Illustrates cross sectional view of alternative embodiment.
Detailed Description of the invention
Hereinafter, various embodiments of the present disclosure will be
described with reference to the accompanying drawings. It should be noted
that all of these drawings and description are only presented as exemplary
embodiments. It is to note that based on the subsequent description,
alternative embodiments may be conceived that may have a structure and
method as disclosed herein, and such alternative embodiment's may be

used without departing from the principle of the disclosure as claimed
herein.
It may be appreciated that these exemplary embodiments are provided
herein only for enabling those skilled in the art to better understand and
then further implement the present disclosure, and is not intended to limit
the scope of the present disclosure in any manner.
In accordance with the present invention there is provided a submersible
single phase induction motor 01 with integrated capacitor comprises of; a
tubular housing 02; a stator 03 positioned inside said tubular housing in
coaxial relationship with one another; an inner pipe 04 coaxially placed
inside said stator and defining the annular chamber 05 at top and bottom of
the said stator; A capacitor 06 placed in said annular chamber and rest on a
support ring 07; A lower and upper flange (08,09) disposed with coaxial
relationship with tubular housing 02 and closing the said annular chamber
05 at top and bottom; A potting compound 10 filled in the said annular
chamber 05 offer rigidity and support to inner structure ; A rotor 11
coaxially placed inside said inner pipe rotatably supported by a bearing 12
positioned inside an top end bell 13 and bottom end bell 14 wherein said
end bells further supported by lower and upper flange (08,09).
Typically the said inner pipe 04 extended ahead of the support ring 07
have smaller outer diameter.
Typically the outer curved surface of the inner pipe 04 partially adjoining
the inner surface of the stator 03. Wherein the said inner pipe 04 further
comprises of lower inner pipe 15 and upper inner pipe 16, moreover said
lower inner pipe 15 and upper inner pipe 16 interconnected through said
support ring 07.
Typically said support ring 07 further comprises of lower support ring 17
and upper support ring 18, wherein said lower support ring 17 and upper
support ring 18 have provision to adapt lower inner pipe 15 and upper
inner pipe 16 consecutively on their inner peripheral surface.
According to one of the embodiment of the invention substantially as
described with reference to accompanying drawing said lower inner pipe
15 and upper inner pipe 16 are integral parts.
According to one of the embodiment of the invention said lower support
ring 17 and upper support ring 18 are integral part.
According to one of the embodiment of the invention substantially as
described with reference to accompanying drawing (Figure - 2) wherein
said lower inner pipe 22, upper inner pipe 21 and support ring 23 are
integral part.
The submersible motor with integrated capacitor as substantially described
in above description and with reference to accompanying drawing.