Stator for a multiple-pole dynamoelectric machine and method of fabricating same

• US 4,520,287 A
• Filed: 05/23/1983
• Issued: 05/28/1985
• Est. Priority Date: 10/27/1981
• Status: Expired due to Term

• Current Assignee: Emerson Electric Company
• Original Assignee: Emerson Electric Company
• Inventors: Wang, David C., Voepel, Harry W.
• Primary Examiner(s): Beha, Jr., William H.
• Assistant Examiner(s): Rebsch, D. L.
• Application Number:
  US06/497,085
• Time in Patent Office: 736 Days
• Field of Search: 310/180, 310/184, 310/198, 310/202, 310/207, 310/179, 310/185, 310/187, 29/596, 29/736
• US Class Current: 310/184
• CPC Class Codes: H02K 15/068 Strippers
• 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
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine

Abstract

A stator assembly for a multiple-pole (e.g., an 18 pole) induction motor has a main winding and an auxiliary winding, with the main and auxiliary windings each having a first and a second coil set, each of these coil sets having multiple coils selectively electrically connected together. The stator assembly further includes a core having slots for receiving the coils, which is continuously skein wound in an open, serpentine sequence. There is one coil of the first auxiliary winding coil set inserted in the first and third slots of the core, one coil of the first main winding coil set inserted in the second and fourth slots, one coil of the second auxiliary winding coil set inserted in the third and fifth slots, and one coil of the second main winding coil set inserted in the fourth and sixth slots thereby to form a layered coil insertion pattern of the coils in the first six slots of the core. Second coils from each of the coil sets are then inserted in a similar layered fashion in the slots 5-10 of the core to form another layered insertion pattern of the coils in the slots. This layered insertion pattern is repeated until all of the coils are inserted into the slots of the core.

A method of fabricating such a stator assembly for a multiple pole motor is also disclosed.

Claims

1. A stator for a multiple-pole dynamoelectric machine comprising a core of a stack of laminations of suitable ferromagnetic material, said core having a central bore extending therethrough and a plurality of blind slots extending radially outwardly from said bore, said slots being substantially equally angularly spaced about said bore, an auxiliary winding divided into a first auxiliary winding coil set and a second auxiliary winding coil set, and a main winding divided into a first main winding coil set and a second main winding coil set, each of said coil sets being constituted by a respective skein of a suitable magnet wire of petalled, serpentine shape defining a plurality of coils with each coil having a multiplicity of turns of said magnet wire therein and with each coil having a first and a second end turn and a pair of straight coil sections between each of the end turns, said core having a first straight coil section of a first coil of a first of said coil sets inserted in a first slot of said core and the next straight coil section of said first coil of said first coil set being inserted in the third slot of said core, the remainder of the straight coil sections of said first coil set being inserted in the fifth, seventh, . . . , and next to last slots of said core, said straight coil sections of a second coil set being inserted in said second, fourth, sixth, . . . , and last slots of said core, said straight coil sections of a third coil set being inserted in the third, fifth, seventh, . . . , and first slots of said core, and the coil sections of a fourth coil set being inserted in the fourth, sixth, eighth, . . . , and second slots of said core, said coil sets being electrically connected for operation of said dynamoelectric machine.

2. A stator for a multiple-pole dynamoelectric machine comprising a core of a stack of laminations of suitable ferromagnetic material, said core having a central bore extending therethrough and a plurality of blind slots extending radially outwardly from said bore, said slots being substantially equally angularly spaced about said bore, a auxiliary first winding divided into a first coil set and a second coil set, and a main second winding divided into a first coil set and a second coil set, each of said coil sets being constituted by a respective skein of suitable magnet wire of petalled, serpentine shape defining a plurality of coils with each coil having a multiplicity of turns of said magnet wire therein and with each coil having a first and a second end turn and a pair of straight coil sections between each of the end turns, said core having a first straight coil section of a first coil of a first of said coil sets inserted in a first slot of said core and the next straight coil section of said first coil of said first coil set being inserted in the third slot of said core, the remainder of the straight coil sections of said first coil set being inserted in the fifth, seventh, . . . , and next to last slots of said core, said coil sections of a second coil set being inserted in said second, fourth, sixth, . . . , and last slots of said core, said coil sections of a third coil set being inserted in the third, fifth, seventh, . . . , and first slots of said core, and the coil sections of a fourth coil set being inserted in the fourth, sixth, eighth, . . . , and second slots of said core, said coil sets being electrically connected for operation of said dynamoelectric machine.

3. A stator for a multiple-pole dynamoelectric machine comprising a core of a stack of laminations of suitable ferromagnetic material, said core having a central bore extending therethrough and a plurality of blind slots extending radially outwardly from said bore, said slots being substantially equally angularly spaced about said bore, at least a first winding and a second winding, each of said windings comprising a respective skein of a suitable magnet wire of petalled, serpentine shape defining a plurality of coils, with each of said coils having a multiplicity of turns of said magnet wire, at least one straight section for insertion into said slots of said core, and an end turn interconnecting said straight sections out beyond the end faces of said core, said first and second windings having means for decreasing the size of said end turns, this last-said means comprising a division of said first and second windings into first and second coil sets for said first and second windings, said core having a first straight coil section of a first coil of said first coil sets inserted into a first slot of said core, and the next straight coil section of said first coil of said first coil set being inserted into the third slot of said core, the remainder of the straight coil sections of said first coil set being inserted into the fifth, seventh, ninth, . . . , and the next to last slots of said core, said coil sections of a second coil set being inserted into the second, fourth, sixth, . . . , and last slots of said core, said coil sections of a third coil set being inserted in the third, fifth, seventh, . . . , and the first slots of said core, and the coil sections of a fourth coil set being inserted in the fourth, sixth, eighth, . . . , and the second slots of said core, the first coils of each of said coil sets constituting a first physical pole of said stator, the second coils of each of said coil sets constituting a second physical pole of said stator, . . . , such that there is a physical pole in said stator for each coil in said winding, said coil sets being electrically connected for operation of said dynamoelectric machine.

4. A stator for a multiple-pole dynamoelectric machine comprising a core of a stack of laminations of suitable ferromagnetic material, said core having a central bore extending therethrough and a plurality of blind slots extending radially outwardly from said bore, said slots being substantially equally angularly spaced about said bore, an auxiliary winding divided into a first auxiliary winding coil set and a second auxiliary winding coil set, and a main winding comprising at least one main winding coil set, each of said coil sets being constituted by a respective skein of a suitable magnet wire of petalled, serpentine shape defining a plurality of coils, with each coil having a multiplicity of turns of said magnet wire therein, and with each coil having a first and a second end turn and a pair of straight coil sections between each of the end turns, said core having a first straight coil section of a first coil of a first of said coil sets inserted in a first slot of said core, and the next straight coil section of said first coil of said first coil set of said auxiliary winding being inserted in a first slot of said core, and the next straight coil section of said first coil of said first coil set of said auxiliary winding being inserted in the third slot of said core, the remainder of the straight coil sections of said first coil set of said auxiliary winding being inserted in the fifth, seventh, . . . , and next to last slots of said core, said straight coil sections of said main winding coil set being inserted in said second, fourth, sixth, . . . , and last slots of said core, said straight coil sections of said main winding coil set being inserted in said second, fourth, sixth, . . . , and last slots of said core, and said straight coil sections of said second coil set of said auxiliary winding being inserted in the third, fifth, seventh, . . . , and first slots of said core, the first coils of each of said coil sets constituting a first physical pole of said stator, the second coils of each of said coil sets constituting a second pole of said stator, . . . , such that there is a physical pole in said stator for each coil and each of said windings, said coil sets being electrically connected for operation of said dynomelectric machine.

5. A stator for a multiple-pole dynamoelectric machine comprising a core of a stack of laminations of suitable ferromagnetic material, said core having a central bore extending therethrough and a plurality of blind slots extending radially outwardly from said bore, said slots being substantially equally angularly spaced about said bore, a main winding divided into a first main winding coil set and a second main winding coil set, and an auxiliary winding comprising at least one auxiliary winding coil set, each of said coil sets being constituted by a respective skein of a suitable magnet wire of petalled, serpentine shape defining a plurality of coils, with each coil having a multiplicity of turns of said magnet wire therein, and with each coil having a first and a second end turn and a pair of straight coil sections between each of the end turns, said core having a first straight coil section of a first coil of a first of said coil sets inserted in a first slot of said core, and the next straight coil section of said first coil of said first coil set of said auxiliary winding being inserted in a first slot of said core, and the next straight coil section of said first coil of said first coil set of a said main winding being inserted in the third slot of said core, the remainder of the straight coil sections of said first coil set of said main winding being inserted in the fifth, seventh, . . . , and next to last slots of said core, said straight coil sections of said auxiliary winding coil set being inserted in said second, fourth, sixth, . . . , and last slots of said core, said straight coil sections of said auxiliary winding coil set being inserted in said second, fourth, sixth, . . . , and last slots of said core, and said straight coil sections of said second coil set of said main winding being inserted in the third, fifth, seventh, . . . , and first slots of said core, the first coils of each of said coil sets constituting a first physical pole of said stator, the second coils of each of said coil sets constituting a second pole of said stator, . . . , such that there is a physical pole in said stator for each coil and each of said windings, said coil sets being electrically connected for operation of said dynamoelectric machine.