PERMANENT MAGNET ELECTRIC MOTOR
First Claim
1. A permanent magnet electric motor, comprising:
- a stator having an armature winding in a stator core, anda rotor having a permanent magnet built into a rotor core,wherein the rotor core is divided into two or more rotor cores in an axial direction thereof, the permanent magnet is mounted at the same position in the divided rotor cores, and a part that causes magnetic properties to be different for each of the divided rotor cores is provided so that a skew function is exhibited in the rotor core by the part.
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Accused Products
Abstract
According to one embodiment, a rotor 1 has rotor cores 2a, 2b divided in the axial direction. a permanent magnet 30 is mounted at the position of each of the magnetic poles of cores. The permanent magnet 30 of each magnetic pole is configured by a single tabular member that penetrates the two divided cores in the axial direction. Convex parts 31a, 31b are respectively provided on the outer peripheries of the respective magnetic poles of the rotor cores along the axial direction of the rotor. The convex parts 31a, 31b are provided to positions that are displaced for each of the two divided cores. The magnetic flux density increases in the convex parts, which becomes the magnetic pole center. Since the convex parts positions are displaced to each other, a skew function can be exhibited even if the permanent magnet is mounted at the same position.
40 Citations
24 Claims
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1. A permanent magnet electric motor, comprising:
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a stator having an armature winding in a stator core, and a rotor having a permanent magnet built into a rotor core, wherein the rotor core is divided into two or more rotor cores in an axial direction thereof, the permanent magnet is mounted at the same position in the divided rotor cores, and a part that causes magnetic properties to be different for each of the divided rotor cores is provided so that a skew function is exhibited in the rotor core by the part. - View Dependent Claims (2, 3, 4, 5)
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6-15. -15. (canceled)
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16. A permanent magnet electric motor, comprising:
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a stator having an armature winding in a stator core; and a rotor having a permanent magnet built into a rotor core, wherein a part that causes magnetic properties to be different for each of the magnetic poles is provided in respective magnetic poles in the rotor core, thereby causing the rotor core to exhibit a skew function. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification