Sixteen and thirty two slot three phase induction motor winding

• US 6,114,790 A
• Filed: 10/29/1998
• Issued: 09/05/2000
• Est. Priority Date: 10/29/1998
• Status: Expired due to Term

• Current Assignee: Nidec Motor Corporation (Nidec Corporation)
• Original Assignee: Emerson Electric Company
• Inventors: Fei, Renyan W.
• Primary Examiner(s): LABALLE, CLAYTON E
• Application Number:
  US09/182,758
• Time in Patent Office: 677 Days
• Field of Search: 310/42, 310/180, 310/184, 310/206, 310/207, 310/208, 29/596, 242/432
• US Class Current: 310/180
• CPC Class Codes: H02K 3/28 Layout of windings or of connections between windings windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32

Abstract

An electric motor comprising a stator having sixteen or thirty two slots and three windings asymmetrically arranged in the slots to achieve a substantially balanced three-phase operation.

Claims

1. In a four pole motor having a stator with a plurality of slots arranged asymmetrically relative to three-phase operation;

a plurality of asymmetric windings arranged to provide a balanced three-phased operation.

2. The four-pole motor according to claim 1 wherein the windings substantially evenly fill the slots.

3. The motor according to claim 1 wherein the stator comprises a substantially square stack of laminations with sixteen slots therein, with twelve of the slots being substantially equal in size, and four of the slots, equally spaced from each other, being larger than the other twelve slots.

4. The motor according to claim 3 wherein the four larger slots are positioned in the corners of the square lamination.

5. The four-pole motor according to claim 1 wherein the stator comprises a substantially square stack of laminations with thirty two slots therein, with twenty-four of the slots being substantially equal in size, and eight of the slots, arranged in four pairs equally spaced from each other, being larger than the other twenty-four slots.

6. The four-pole motor according to claim 5 wherein the pairs of larger slots are positioned in the corners of the square lamination.

19. The motor according to claim 5 wherein the windings are arranged in the slots so that twenty four of the slots have substantially the same number of wires, and eight of the slots have a greater number of wires, these eight slots with a greater number of wires being arranged in four pairs equally spaced from other.

7. In a four pole motor having a stator with sixteen slots arranged asymmetrically relative to three-phase operation, a plurality of asymmetric windings arranged to provide a balanced three-phase operation.

8. The motor according to claim 7 wherein the plurality of asymmetric windings comprises a first winding comprising four coils;

a second winding comprising six coils, and a third winding comprising six coils, the coils arranged asymmetrically in the slots to form four poles of a three-phase motor.

9. The motor according to claim 7 wherein there are three windings arranged asymmetrically in the slots.

10. The four-pole motor according to claim 7 wherein the windings substantially evenly fill the slots.

11. The motor according to claim 7 wherein there is a first winding for the first phase, a second winding for the second phase, and a third winding for the third phase;

the first winding comprising first, second, third and fourth coils, the first coil wound in a first direction in slots 1 and 5 of the stator, the second coil wound in a second direction in slots 5 and 9 of the stator;

the third coil wound in the first direction in slots 9 and 13 of the stator, and the fourth coil wound in the second direction in slots 13 and 1;

the second winding comprising first, second, third, fourth, fifth, and sixth coils, the first coil wound in the first direction in slots 3 and 7 in the stator, the second coil wound in the first direction in slots 4 and 8 in the stator, the third coil wound in the second direction in slots 8 and 12 in the stator, the fourth coil wound in the first direction in slots 11 and 15 in the stator, the fifth coil wound in the first direction in slots 12 and 16 in the stator, and the sixth coil wound in the second direction in slots 16 and 4 in the stator; and

the third winding comprising first, second, third, fourth, fifth, and sixth coils, the first coil wound in the first direction in slots 6 and 10 in the stator;

the second coil wound in the first direction in slots 7 and 11 of the stator;

the third coil wound in the second direction in slots 10 and 14 of the stator;

the fourth coil wound in the first direction in slots 14 and 2 in the stator;

the fifth coil wound in the first direction in slots 15 and 3 in the stator; and

the sixth coil wound in the second direction in slots 2 and 6.

12. The motor according to claim 7 wherein the windings are arranged in the slots so that twelve of the slots have substantially the same number of wires, and four of the slots have a greater number of wires, these four slots with a greater number of wires being equally spaced from each other.

13. In a motor having a stator with thirty-two slots arranged asymmetrically relative to three-phase operation, a plurality of asymmetric windings arranged to provide a balanced three-phase operation.

14. The motor according to claim 13 wherein the plurality of asymmetric windings comprises a first winding comprising four coils;

a second winding comprising six coils, and a third winding comprising six coils, the coils arranged asymmetrically in the slots to form four poles of a three-phase motor.

15. The electric motor according to claim 14 wherein the three windings comprise a first windings having four coil sections disposed in the slots, a second winding having six coil sections disposed in the slots, and a third coil section having six coil sections disposed in the slots.

16. The motor according to claim 13 wherein there are three windings arranged asymmetrically in the slots.

17. The motor according to claim 13 wherein the windings substantially evenly fill the slots.

18. The motor according to claim 13 wherein there is a first winding for the first phase, a second winding for the second phase, and a third winding for the third phase;

the first winding comprising a first, second, third, and fourth coils, the fist coil spanning slots 1 to 8 and 2 to 7, wound in a first direction;

the second coil spanning slots 9 to 16 and 10 to 15, wound in a second direction;

the third coil spanning slots 17 to 24 and 18 to 23, wound in the first direction; and

the fourth coil spanning slots 25 to 32 and 26 to 31, wound in the second direction;

the second winding comprising first, second, third, fourth, fifth and sixth coils, the first coil spanning slots 7 to 14 and 8 to 13, wound in the first direction;

the second coil spanning slots 15 to 22 and 16 to 21, wound in the second direction;

the third coil spanning slots 23 to 30 and 24 to 29, wound in the first direction;

the fourth coil spanning slots spanning slots 31 to 6 and 32 to 5, wound in the second direction;

the fifth coil spanning slots 5 to 12 and 6 to 11, wound in the first direction; and

the sixth coil spanning slots 21 to 28 and 22 to 27, wound in the first direction;

the third winding comprising first, second, third, fourth, fifth, and sixth coils, the first coil spanning slots 27 to 2 and 28 to 1, wound in the first direction;

the second coil spanning slots 3 to 10 and 4 to 9, wound in the second direction;

the third coil spanning slots 11 to 18 and 12 to 17, wound in the first direction;

the fourth coil spanning slots 19 to 26 and 20 to 25, wound in the second direction;

the fifth coil 138 spanning slots 29 to 4 and 30 to 3, wound in the first direction; and

the sixth coil spanning slots 13 to 20 and 14 to 19, wound in the first direction.

20. A four-pole electric motor comprising a stator with a plurality of slots arranged asymmetrically with respect to symmetric three-phase operation, and three windings asymmetrically arranged in the slots to achieve a substantially balanced three-phase operation.

21. The four-pole electric motor according to claim 20 wherein the windings substantially evenly fill the slots.

22. A four-pole electric motor comprising a stator having sixteen slots and three windings asymmetrically arranged in the slots to achieve a substantially balanced three-phase operation.

23. The four-pole electric motor according to claim 22 wherein the windings substantially evenly fill the slots.

24. An electric motor comprising a stator having thirty-two slots and three windings asymmetrically arranged in the slots to achieve a substantially balanced three-phase operation.

25. The electric motor according to claim 24 wherein the windings substantially evenly fill the slots.

26. In a motor having a stator with a plurality of slots arranged asymmetrically relative to three-phase operation;

a plurality of asymmetric windings substantially evenly filling the slots, with the windings arranged to provide a balanced three-phased operation.

27. The motor according to claim 26 wherein the windings comprise at least two different materials providing the same conductivity with different cross sectional areas for providing substantially even filling of the slots.

28. The motor according to claim 27 wherein the winding material is a metal selected from the group consisting of copper and aluminum.