1. A motor assembly (100), comprising:
a housing (150);
5 a motor control unit (122), operatively coupled to a motor, comprising:
a printed circuit board (PCB) (124);
at least one electronic component (126), that generates heat, mounted on a top side of the
PCB; and
a controller (130) mounted on the top side of the PCB and operatively coupled to the at
10 least one electronic component; and
a motor end cover (106), attached to a side of the housing, wherein the motor end cover
comprises:
a single-flow coolant path (108) that is directly drilled into a casing of the motor end
cover;
15 at least one projection (114) located on a top side of the motor end cover and arranged
along the single-flow coolant path;
an inlet (110) through which a coolant medium enters the motor end cover and flows
along the single-flow coolant path; and
an outlet (112) through which the coolant medium exits the motor end cover from the
20 single-flow coolant path,
wherein the top side of the PCB is directly placed on the motor end cover such that the at
least one projection supports the at least one electronic component located on the top side of
the PCB.
25 2. The motor assembly as claimed in claim 1, comprising a heat sink (140) integrated with the
single-flow coolant path, wherein the at least one projection is thermally connected to the at
least one electronic component to transfer the heat generated by the at least one electronic
component to the coolant medium.
30 3. The motor assembly as claimed in claim 1, wherein the single-flow coolant path is at least
one of: triangular-shaped, rectangular-shaped, or square-shaped.
15
4. The motor assembly as claimed in claim 1, wherein the at least one projection is at least one
of: V-shaped, U-shaped, L-shaped, and arc-shaped.
5 5. The motor assembly as claimed in claim 1, wherein the cross section of the coolant flow path
is circular.
6. The motor assembly as claimed in claim 1, wherein the at least one projection is shaped in a
manner that aligns along with the shape of the single-flow coolant path.
10
7. The motor assembly as claimed in claim 6, wherein at least two electronic components are
arranged in a path, that is shaped to align with the at least one projection’s shape, on the top
side of the PCB, such that the at least one projection supports the at least two electronic
components.
15
8. The motor assembly as claimed in claim 1, wherein the at least one projection is:
fastened to the motor end cover; or
a cast structure along with the end cover.
20 9. The motor assembly as claimed in claim 1, comprising:
a plurality of phase connectors (146) mounted on the motor end cover; and
a plurality of bus bars (148), for the plurality of phase connectors, mounted on the bottom
side of the PCB.
25 10. The motor assembly as claimed in claim 1, wherein the surface of the at least one projection
comprises a first layer (116) and a second layer (118), the first layer resting on the second
layer, wherein the first layer supports the at least one electronic component, and wherein the
second layer is covered by a material (120) that is electrically insulating and thermally
conductive