| 摘要 |
A permanent magnet motor is obtained in which an electromagnetic excitation force of a low spatial order is reduced, and influence of a magnetomotive force harmonic of a rotor is reduced so that torque ripple is reduced. In a permanent magnet motor 10, one set of armature windings 30-1 is supplied with current from a first inverter, and the other set of armature windings 30-2 is supplied with current from a second inverter. In the case where a pole number of a rotor 11 is M and the number of slots 25 of a stator iron core 22 is Q, M and Q satisfy a relationship of M < Q and a greatest common divisor of M and Q is equal to or greater than 3. In the rotor 11, a rotor iron core 12 is located on a stator 21 side beyond a radius intermediate between the maximum outer radius and the minimum inner radius of permanent magnets 13. A phase difference between three-phase currents supplied from the first inverter and three-phase currents supplied from the second inverter is controlled to fall within a range of electrical angles of 20 to 40 degrees. |
