FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
As amended by the Patents (Amendment) Act, 2005
AND
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2005
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
An improved end cover for motors, and motors thereof.
APPLICANT(S)
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR(S)
Pangal Sarvesh, of Crompton Greaves Ltd., Machines (M7) Division, D-5 Industrial Area, MPAKVN, Mandideep - 462046, Madhya Pradesh, India; an Indian National.
PREAMBLE TO THE DESCRIPTION:
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

FIELD OF THE INVENTION:
This invention relates to the field of electro-mechanical engineering.
Particularly, this invention relates to the field of motors.
Specifically, this invention relates to an improved end cover for motors, and motors thereof.
BACKGROUND OF THE INVENTION:
A motor for electrical purposes, i.e. an electric motor, is a device which converts electrical energy to mechanical energy. For industrial use, the ratings of motor may typically be very high. They may be placed in housings or frames. A motor contains two main components; stator, rotor. The rotor is the non-stationary part of a rotary motor, which rotates because the wires and magnetic field of the motor are arranged so that a torque is developed about the rotor's axis. The stator is the stationary part of a rotor system. The rotor has a fanning action.
The motor comprises may be coupled with a heat exchanger for cooling the motor continuously, thereby preventing it from damage. There are internal fans which facilitate the rotation of air away from the stator towards the heat exchanger. For this facilitation, an air guide is provided such that there is positive displacement in the desired direction.
There is an end cover which covers the motor, the heat exchanger, and the ducting assembly; in general. This end cover is split into in to two components, according to the prior art. It has more number of welding and requires accurate positioning.

Figure 1 illustrates an end cover of the prior art. The end cover (12) is seen placed operatively atop the motor (10). Reference numeral 14 refers to heat exchangers. Reference numeral 16 refers to ducting assembly.
It has been observed that alignment of the components at the top of the motor is difficult. Accuracy of holes between the components is required; but is not achieved in the job which results in delays as rework needs to be done. Also, more material handling is required since the parts are assembled on top of the vertical motors that is about 3 meters to 4 meters high. Application of foam that is used to reduce noise is difficult, in the prior art.
PRIOR ART:
The prior art documents JP10248209A and JP3015242A disclose the rotary electric machine cooling structure having external fan covered with an outer cover which acts as an air guiding system.
These prior art documents JP10248209A and JP3015242A also disclose the rotary electric machine cooling structure having external fan covered with an outer cover which acts as an air guiding system.
From the above observations, there are no modular and / or single part designs of end cover for vertical induction motors. Also, there is a need for a better air exhaust and better silencer mechanism.
OBJECTS OF THE INVENTION:
An object of the invention is to provide an improved end cover for installation on top of motors.

Another object of the invention is to provide an improved end cover for motors such that alignment and assembly is easy.
Yet another object of the invention is to provide an improved end cover for motors such that the throughput of installation is relatively increased.
Still another object of the invention is to provide an improved end cover for motors such that material handling is eased.
An additional object of the invention is to provide an improved end cover for motors such that better cooling for the motor is achieved.
Yet an additional object of the invention is to provide an improved end cover for motors such that less power is consumed by an external fan.
Still additional object of the invention is to provide an improved end cover for motors such that pressure head loss in motors is comparatively lesser.
Another additional object of the invention is to provide an improved end cover for motors such that there are relatively more options for silencer mounted over the end cover.
Yet another additional object of the invention is to provide an improved end cover for motors such that there is reduction in weight of end cover and motor, thereof.

SUMMARY OF THE INVENTION:
According to this invention, there is provided an end cover for motors, said end
cover being adapted to be placed atop a motor with heat exchangers located
laterally with respect to said motor, said end cover comprises: i. a first lateral channel and a second lateral channel spaced apart from each other to form a spaced apart region, therebetween, said first lateral channel adapted to be in communication with said heat exchanger located on a first side of said motor, at said first lateral channel's first end, and said second lateral channel adapted to be in communication with said heat exchanger located on a second side of said motor, at said second lateral channel's first end; ii. operatively upwards extending baffles in said first end of each of said lateral channels (first and second); and
iii. a silencer adapted to be located atop said spaced apart region of said first lateral channel and said second lateral channel.
Typically, said first lateral channel is a left side channel.
Typically, said first lateral channel is a transposed J shaped channel.
Typically, said second lateral channel is aright side channel.
Typically, said second channel is a transposed J shaped channel.
Typically, said first side of said motor is an operative left side of said motor.
Typically, said second side of said motor is an operative right side of said motor.

Preferably, said silencer is an annular channel extending above said spaced apart region.
Additionally, said silencer is a modular silencer adapted to be separated from remainder of said end cover.
Preferably, said silencer is an inverted cone adapted to be supported by operatively vertical members in an annular form, said vertically members holding a mesh about their annular periphery, which mesh is adapted to block unwanted large sized particles from entering into said end cover.
Particularly, said silencer is an inverted cone adapted to be supported by operatively vertical members in an annular form, said vertically members holding a polyurathene foam about their annular periphery, which polyurathene foam is adapted to block unwanted large sized particles from entering into said end cover.
According to this invention, there is provided a motor with an end cover, said end cover being adapted to be placed atop a motor with heat exchangers located laterally with respect to said motor, said end cover comprises:
a. a first lateral channel and a second lateral channel spaced apart from each
other to form a spaced apart region, therebetween, said first lateral channel
adapted to be in communication with said heat exchanger located on a first
side of said motor, at said first lateral channel's first end, and said second
lateral channel adapted to be in communication with said heat exchanger
located on a second side of said motor, at said second lateral channel's first
end;
b. operatively upwards extending baffles in said first end of each of said lateral
channels (first and second); and

c. a silencer adapted to be located atop said spaced apart region of said first lateral channel and said second lateral channel.
Typically, said first lateral channel is a left side channel.
Typically, said first lateral channel is a transposed J shaped channel.
Typically, said second lateral channel is a right side channel.
Typically, said second channel is a transposed J shaped channel.
Typically, said first side of said motor is an operative left side of said motor.
Typically, said second side of said motor is an operative right side of said motor.
Preferably, said silencer is an annular channel extending above said spaced apart region.
Additionally, said silencer is a modular silencer adapted to be separated from remainder of said end cover.
Preferably, said silencer is an inverted cone adapted to be supported by operatively vertical members in an annular form, said vertically members holding a mesh about their annular periphery, which mesh is adapted to block unwanted large sized particles from entering into said end cover.
Particularly, said silencer is an inverted cone adapted to be supported by operatively vertical members in an annular form, said vertically members holding a

polyurathene foam about their annular periphery, which polyurathene foam is adapted to block unwanted large sized particles from entering into said end cover.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
Figure 1 illustrates an end cover, along with motor, of the prior art.
The invention will now be described in relation to the accompanying drawings, in which:
Figure 2 illustrates an end cover, along with motor and heat exchanger, of this invention.
Figure 3 illustrates an end cover of this invention, in its isometric view;
Figure 4 illustrates an end cover of this invention, in its front view; and
Figure 5 illustrates an end cover of this invention, in its side view.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
Figure 1 illustrates an end cover, along with motor, of the prior art.
The end cover (12) is seen placed operatively atop the motor (10). Reference numeral 14 refers to heat exchangers. Reference numeral 16 refers to ducting assembly. The ducting assembly does not provide a conducive or streamline channel for air flow, thereby not achieving optimum heat exchange capability. Other limitations of the end cover (and hence, motor) are discussed above in the

background of the invention. Reference numeral 18 refers to the silencer of the prior art. The silencer, of the prior art, is non-modular.
According to this invention, there is provided an improved end cover for motors, and motors thereof.
Figure 2 illustrates an end cover, along with motor and heat exchanger, of this invention.
Figure 3 illustrates an end cover of this invention, in its isometric view.
Figure 4 illustrates an end cover of this invention, in its front view.
Figure 5 illustrates an end cover of this invention, in its side view.
In accordance with an embodiment of this invention, there is provided a first lateral channel (22) and a second lateral channel (24) spaced apart from each other to form a spaced apart region, the first lateral channel is a left side channel and is in the form of a transposed J shape. The second lateral channel is a right side channel and is in the form of a transposed J shape. A first end of the fist lateral channel is in communication with the heat exchangers which are located on the first (operative left) side of the motor. Similarly, a first end of the second lateral channel is in communication with the heat exchangers which are located on the second (operative right) side of the motor.
In accordance with another embodiment of this invention, there are provided operatively upwards extending baffles (26) in the first end of both the lateral channels (first and second). These baffles guide the flow of air to / from heat

exchangers disposed below. This guidance is evenly spreading out air to the tubes of the heat exchanger. Hence, this improved end cover has ducting system integrated in the end cover. In accordance with this invention, due to placement of baffles, the air flow path is streamlined and aerodynamic which improves the delivery of air to the tubes of the heat exchanger. In the prior art, this feature was not available since the ducts were separated from the end cover and the baffle was a continuous plate and could not be split in two.
This also results in relatively lesser power consumption by the external fan since the pressure head loss is comparatively lesser. Better cooling for the motor is achieved since the air flow is streamlined
In accordance with another embodiment of this invention, there is provided a silencer (30) adapted to be located atop the spaced apart region of the first lateral channel and the second lateral channel. This silencer portion is an annular channel extending above the spaced apart region. This silencer is modular and can be separated unlike the prior art end covers. This design allows for additional / more options for the silencer mounted over the end cover.
The silencer is located at a position in the external air path in such a way that it channels the air flowing to fan(s) (of the motor). Its construction is a simple inverted cone which is supported by vertical members and is in a circular form. All around the vertical members in the periphery there is a mesh that blocks unwanted large sized particles from entering into the end cover. In the inside portion of the inverted cone there is a 50mm polyurathene foam. The function of this silencer is to reduce airborne noise emanating from the fan(s). Also, it streamlines the flow of air into the fan(s) which reduces turbulence and thereby reduces noise.

Additionally, the silencer restricts any particle entry into the air circuit that would cause harm to the end cover and subsequent heat exchanger.
The Technical Advancement of this invention is in providing a one part end cover which covers the fan cover portion, ducts, and silencer. Also, this end cover makes for easy assembly on the motor. Also, this end cover results in reduction of weight, due to reduction in welding and stiffeners.
While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We claim,
1. An end cover for motors, said end cover being adapted to be placed atop a
motor with heat exchangers located laterally with respect to said motor, said
end cover comprising:
i. a first lateral channel and a second lateral channel spaced apart from each other to form a spaced apart region, therebetween, said first lateral channel adapted to be in communication with said heat exchanger located on a first side of said motor, at said first lateral channel's first end, and said second lateral channel adapted to be in communication with said heat exchanger located on a second side of said motor, at said second lateral channel's first end;
ii. operatively upwards extending baffles in said first end of each of said lateral channels (first and second); and
iii. a silencer adapted to be located atop said spaced apart region of said first lateral channel and said second lateral channel.
2. The end cover for motors as claimed in claim 1, wherein said first lateral channel is a left side channel.
3. The end cover for motors as claimed in claim 1, wherein said first lateral channel is a transposed J shaped channel.
4. The end cover for motors as claimed in claim 1, wherein said second lateral channel is a right side channel.
5. The end cover for motors as claimed in claim 1, wherein said second channel is a transposed J shaped channel.

6. The end cover for motors as claimed in claim 1, wherein said first side of said motor is an operative left side of said motor.
7. The end cover for motors as claimed in claim 1, wherein said second side of said motor is an operative right side of said motor.
8. The end cover for motors as claimed in claim 1, wherein said silencer is an annular channel extending above said spaced apart region.
9. The end cover for motors as claimed in claim 1, wherein said silencer is a modular silencer adapted to be separated from remainder of said end cover.
10. The end cover for motors as claimed in claim 1, wherein said silencer is an inverted cone adapted to be supported by operatively vertical members in an annular form, said vertically members holding a mesh about their annular periphery, which mesh being adapted to block unwanted large sized particles from entering into said end cover.
11. The end cover for motors as claimed in claim 1, wherein said silencer is an inverted cone adapted to be supported by operatively vertical members in an , annular form, said vertically members holding a polyurathene foam about their annular periphery, which polyurathene foam being adapted to block unwanted large sized particles from entering into said end cover.
12. A motor with an end cover, said end cover being adapted to be placed atop a motor with heat exchangers located laterally with respect to said motor, said end cover comprising:

a. a first lateral channel and a second lateral channel spaced apart from
each other to form a spaced apart region, therebetween, said first lateral
channel adapted to be in communication with said heat exchanger
located on a first side of said motor, at said first lateral channel's first
end, and said second lateral channel adapted to be in communication
with said heat exchanger located on a second side of said motor, at said
second lateral channel's first end;
b. operatively upwards extending baffles in said first end of each of said
lateral channels (first and second); and
c. a silencer adapted to be located atop said spaced apart region of said
first lateral channel and said second lateral channel.
13. The motor with an end cover as claimed in claim 12, wherein said first lateral channel is a left side channel.
14. The motor with an end cover as claimed in claim 12 wherein, said first lateral channel is a transposed J shaped channel.
15. The motor with an end cover as claimed in claim 12, wherein said second lateral channel is a right side channel.
16. The motor with an end cover as claimed in claim 12, wherein said second channel is a transposed J shaped channel.
17. The motor with an end cover as claimed in claim 12, wherein said first side of said motor is an operative left side of said motor.

18. The motor with an end cover as claimed in claim 12, wherein said second side of said motor is an operative right side of said motor.
19. The motor with an end cover as claimed in claim 12, wherein said silencer is an annular channel extending above said spaced apart region.
20. The motor with an end cover as claimed in claim 12, wherein said silencer is a modular silencer adapted to be separated from remainder of said end cover.
21. The motor with an end cover as claimed in claim 12, wherein said silencer is an inverted cone adapted to be supported by operatively vertical members in an annular form, said vertically members holding a mesh about their annular periphery, which mesh being adapted to block unwanted large sized particles from entering into said end cover.
22. The motor with an end cover as claimed in claim 12, wherein said silencer is
. an inverted cone adapted to be supported by operatively vertical members in
an annular form, said vertically members holding a polyurathene foam about their annular periphery, which polyurathene foam being adapted to block unwanted large sized particles from entering into said end cover.