| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor utilizing reluctance torque in which torque ripple and cogging torque can be reduced. SOLUTION: A buried magnet type motor comprises a stator 2 having a plurality of teeth 7 formed to extend toward the axial center at an equiangular interval in the circumferential direction and applied with winding, and a rotor 3 having a rotor core 11 provided with a plurality of non-magnetic path forming parts (containing holes 21a, 21b, 22a, 22b and V-shaped permanent magnets 12, 13) in the circumferential direction and rotary drives the rotor 3 using the reluctance torque as a part of driving force. Outer extensions 42a-42d are formed in proximity to the outer circumference of the rotor core 11 at the end part of the containing holes 21a, 21b, 22a, 22b. A pair of approximate extensions 42a and 42d are formed such that a part thereof (outer extension 42b, 42d) has a shape partially different from that of a pair of outer extensions 42b and 42c adjacent in the circumferential direction. COPYRIGHT: (C)2006,JPO&NCIPI
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