Motor including stator cooling channel adjacent to stator slots

• US 10,454,330 B2
• Filed: 06/17/2016
• Issued: 10/22/2019
• Est. Priority Date: 06/19/2015
• Status: Active Grant

• Current Assignee: Nidec Motor Corporation (Nidec Corporation)
• Original Assignee: Ward Leonard Investment Holdings, LLC
• Inventors: Sailor, Eric, Cook, Daniel, Gimmel, Alexander, Bridgemohan, Alex, Matthews, Paul, Moroz, Myron
• Primary Examiner(s): Kim, John K
• Application Number:
  US15/185,913
• Publication Number:
  US 20160372985A1
• Time in Patent Office: 1,222 Days
• Field of Search: 310 59, 310 61, 310 58, 310201, 310214
• CPC Class Codes: H02K 1/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 1/30 using intermediate parts, e.g. spiders
• CPC Class Codes: H02K 1/32 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 17/16 having rotors with internally short-circuited windings, e.g. cage rotors
• CPC Class Codes: H02K 17/165 characterised by the squirrel-cage or other short-circuited windings
• CPC Class Codes: H02K 17/20 having deep-bar rotors
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02K 7/04 Balancing means
• CPC Class Codes: H02K 9/04 having means for generating a flow of cooling medium

Abstract

A motor including a stator including a plurality of stator slots having stator coils disposed therein, and a rotor rotatable within the stator about a central axis. The stator includes a plurality of stator channel formed adjacent to the stator slots and extending in the axial direction of the central axis.

Claims

1. A motor comprising:

a stator including a plurality of stator slots having stator coils disposed therein; and

a rotor rotatable within the stator about a central axis;

wherein the stator includes a plurality of stator channels formed adjacent to the stator slots and extending in the axial direction of the central axis, each stator channel located between a stator coil and the rotor;

wherein the rotor includes a rotor core and a plurality of concentric rotor vents extending therethrough from one axial end to the other;

wherein an airflow path through the inside of the rotor includes passages formed through the plurality of rotor vents; and

wherein at least one adjustable deflector plate attached to an axial end of the rotor core and configured to move axially in and out relative to the rotor core controls fluid flow through the airflow path through the inside of the rotor.

2. The motor according to claim 1, wherein the stator coils are recessed within the stator slots.

3. The motor according to claim 1, wherein the plurality of stator channels increase an exposed surface area of the stator in the vicinity of the stator coils.

4. The motor according to claim 1, wherein the motor is an AC induction motor.

5. The motor according to claim 1, wherein at least one turbulator is disposed within at least one rotor vent of the plurality of rotor vents.

6. The motor according to claim 1, wherein the motor further comprises a motor housing and wherein the plurality of stator channels form an airflow path in the motor housing that increases an exposed surface area of the stator in the vicinity of the stator coils.

7. A motor comprising:

a stator including a plurality of stator slots having stator coils disposed therein; and

a rotor rotatable within the stator about a central axis;

wherein the stator includes a plurality of stator channels formed adjacent to the stator slots and extending in the axial direction of the central axis, each stator channel located between a stator coil and the rotor;

wherein the motor further comprises a motor housing and wherein the plurality of stator channels form an airflow path in the motor housing that increases an exposed surface area of the stator in the vicinity of the stator coils; and

wherein the motor further comprises a fan module assembly, wherein the fan module assembly comprises at least one latch that is configured to be actuated from a secured position to an unsecured position, and vice versa, the at least one latch securing the fan module assembly to the motor housing when the latch is in a secured position and allowing the fan module assembly to be removed from the motor housing when the latch is in the unsecured position.

8. The motor according to claim 7, wherein the stator coils are recessed within the stator slots.

9. The motor according to claim 7, wherein the plurality of stator channels increase an exposed surface area of the stator in the vicinity of the stator coils.

10. The motor according to claim 7, wherein the motor is an AC induction motor.

11. The motor according to claim 7, wherein the rotor includes a rotor core and a plurality of concentric rotor vents extending therethrough from one axial end to the other;

and

wherein an airflow path through the inside of the rotor includes passages formed through the plurality of rotor vents.

12. The motor according to claim 11, wherein at least one turbulator is disposed within at least one rotor vent of the plurality of rotor vents.

13. A machine comprising:

a motor housing;

a stator mounted within the motor housing;

a rotor rotatable within the stator about a central axis, the rotor comprising a rotor core and a plurality of concentric rotor vents extending therethrough from one axial end of the rotor core to the other; and

a fan module assembly comprising a fan housing and at least one blower, the fan housing being mounted to the motor housing so that an interior of the fan housing is fluidly connected to an interior of the motor housing;

wherein the at least one blower is coupled to an exterior wall of the fan housing and is configured to transfer air between an exterior of the fan housing and the interior of the fan housing to move air through the fan housing, motor housing and through an airflow path through the inside of the rotor that includes passages formed through the plurality of rotor vents; and

wherein at least one adjustable deflector plate attached to an axial end of the rotor core and configured to move axially in and out relative to the rotor core controls fluid flow through the airflow path through the inside of the rotor.

14. The machine according to claim 13, wherein the motor housing includes at least one opening formed therethrough through which the air is moved.

15. The machine according to claim 14, wherein the at least one blower is positioned to blow air into the fan housing, through the motor housing and the airflow path through the inside of the rotor and out the opening formed in the motor housing.

16. The machine of claim 14, wherein the fan module assembly comprises at least one latch that is configured to be actuated from a secured position to an unsecured position, and vice versa, the at least one latch securing the fan module assembly to the motor housing when the latch is in a secured position and allowing the fan module assembly to be removed from the motor housing when the latch is in the unsecured position.

17. The machine according to claim 13, wherein at least one turbulator is disposed within at least one rotor vent of the plurality of rotor vents.

18. The machine according to claim 13, wherein the stator includes a plurality of stator slots having coils disposed therein and a plurality of stator channels formed adjacent the stator slots and extending in the axial direction of the central axis.

19. The machine according to claim 18, wherein the plurality of stator channels form a second airflow path in the motor housing that increases an exposed surface area of the stator in the vicinity of the stator coils.

20. The machine according to claim 13, wherein the machine is an AC induction motor.

21. A machine comprising:

a motor housing;

a stator mounted within the motor housing;

a rotor rotatable within the stator about a central axis, the rotor comprising a rotor core and a plurality of concentric rotor vents extending therethrough from one axial end of the rotor core to the other; and

a fan module assembly comprising a fan housing and at least one blower, the fan housing being mounted to the motor housing so that an interior of the fan housing is fluidly connected to an interior of the motor housing;

wherein the at least one blower is coupled to an exterior wall of the fan housing and is configured to transfer air between an exterior of the fan housing and the interior of the fan housing to move air through the fan housing, motor housing and through an airflow path through the inside of the rotor that includes passages formed through the plurality of rotor vents; and

wherein the fan module assembly comprises at least one latch that is configured to be actuated from a secured position to an unsecured position, and vice versa, the at least one latch securing the fan module assembly to the motor housing when the latch is in a secured position and allowing the fan module assembly to be removed from the motor housing when the latch is in the unsecured position.

22. The machine according to claim 21, wherein the motor housing includes at least one opening formed therethrough through which the air is moved.

23. The machine according to claim 21, wherein at least one turbulator is disposed within at least one rotor vent of the plurality of rotor vents.

24. The machine according to claim 21, wherein the stator includes a plurality of stator slots having coils disposed therein and a plurality of stator channels formed adjacent the stator slots and extending in the axial direction of the central axis.

25. The machine according to claim 24, wherein the plurality of stator channels form a second airflow path in the motor housing that increases an exposed surface area of the stator in the vicinity of the stator coils.