Single phase motor
First Claim
1. A single phase motor, comprising:
- a rotor including magnetic poles; and
a stator comprising a stator core and a winding wound on the stator core, the stator core comprising a plurality of stator teeth each comprising a tooth body extending along a radial direction of the rotor and a tooth end formed at an end of the tooth body, the tooth end comprising first and second arcuate regions facing the rotor,wherein each magnetic pole has an edge region facing the stator, the edge regions of the magnetic poles of the rotor and the first arcuate region of the stator being coaxial with each other,wherein, when the winding is not energized, a first magnetic coupling between said first arcuate region and a selected magnetic pole of said rotor is greater than a second magnetic coupling between said second arcuate region and the selected magnetic pole, the magnetic pole being offset from a selected tooth body in such a way as to enable movement of said rotor to initiate in either of two opposite directions relative to said selected tooth body upon energizing the winding, andwherein each two adjacent tooth ends of the stator are completely disconnected from each other and only an empty slot is between the each two adjacent tooth ends.
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Accused Products
Abstract
A single phase motor includes a rotor including magnetic poles and a stator comprising a stator core and a winding wound on the stator core. The stator core includes a plurality of stator teeth each including a tooth body and a tooth end formed at an end of the tooth body, the tooth end comprising first and second arcuate regions facing the rotor. When the winding is not energized, a first magnetic coupling between said first arcuate region and a selected magnetic pole of said rotor is greater than a second magnetic coupling between said second arcuate region and the selected magnetic pole, said first arcuate region being offset from a selected tooth body in such a way as to enable movement of said rotor to initiate in either of two opposite directions relative to said selected tooth body upon energizing the winding.
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Citations
16 Claims
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1. A single phase motor, comprising:
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a rotor including magnetic poles; and a stator comprising a stator core and a winding wound on the stator core, the stator core comprising a plurality of stator teeth each comprising a tooth body extending along a radial direction of the rotor and a tooth end formed at an end of the tooth body, the tooth end comprising first and second arcuate regions facing the rotor, wherein each magnetic pole has an edge region facing the stator, the edge regions of the magnetic poles of the rotor and the first arcuate region of the stator being coaxial with each other, wherein, when the winding is not energized, a first magnetic coupling between said first arcuate region and a selected magnetic pole of said rotor is greater than a second magnetic coupling between said second arcuate region and the selected magnetic pole, the magnetic pole being offset from a selected tooth body in such a way as to enable movement of said rotor to initiate in either of two opposite directions relative to said selected tooth body upon energizing the winding, and wherein each two adjacent tooth ends of the stator are completely disconnected from each other and only an empty slot is between the each two adjacent tooth ends. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A single phase motor, comprising:
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a rotor including magnetic poles; and a stator comprising a stator core and a winding wound on the stator core, the stator core comprising a plurality of stator teeth each comprising a tooth body and a tooth end formed at an end of the tooth body, the tooth end comprising first and second arcuate regions both made of magnetic material and facing the rotor, wherein each magnetic pole has an edge region facing the stator, the edge regions of the magnetic poles of the rotor and the first arcuate region of the stator being coaxial with each other, wherein, when the winding is not energized, a first magnetic coupling between said first arcuate region and a selected magnetic pole of said rotor is greater than a second magnetic coupling between said second arcuate region and the selected magnetic pole, the magnetic pole being offset from a selected tooth body in such a way as to enable movement of said rotor to initiate in either of two opposite directions relative to said selected tooth body upon energizing the winding, and wherein the first and second arcuate regions of each tooth end are both made of soft ferromagnetic material, each two adjacent tooth ends of the stator are completely disconnected from each other with only an empty slot therebetween, a ratio of a circumferential width of the empty slot to a width of an air gap formed between the edge regions of the magnetic poles of the rotor and the first arcuate regions of the stator range is less than four. - View Dependent Claims (13, 14, 15, 16)
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Specification