Permanent Magnet Rotating Electrical Machine and a Motor Vehicle Using Same

摘要

A permanent magnet rotating electrical machine includes a rotor which has permanent magnets buried in a plurality of permanent magnet insertion slots that are provided in a rotor core, and the rotor is rotatably supported by a rotary shaft with a gap on the inner peripheral side of a stator. When the axis of magnetic flux for the permanent magnet is set as a d-axis and the position deviated from the d-axis by electrical angle of 90° is set as a q-axis, the permanent magnet insertion slot is located on the q-axis and a first permanent magnet magnetized in the direction orthogonal to the q-axis is buried in the permanent magnet insertion slot. The permanent magnet insertion slot is located on the d-axis and a second permanent magnet magnetized in the direction parallel to the d-axis is buried in the permanent magnet insertion slot, while at least one or more third permanent magnets buried in the permanent magnet insertion slots are provided between the first permanent magnet and the second permanent magnet. Thereby, the environmental load discharged from a motor vehicle is reduced.

主权项

1. A permanent magnet rotating electrical machine comprising:
a stator including armature windings in a plurality of slots formed in a stator core; and a rotor including a rotor core and permanent magnets buried in a plurality of permanent magnet insertion holes provided in the rotor core, the rotor being rotatably supported by a rotary shaft via a gap on an inner circumferential side of the stator, wherein when an axis of magnetic flux for the permanent magnet is set as a d-axis, and a position deviated from the d-axis by an electric angle of 90 degrees is set as a q-axis, one of the permanent magnet insertion holes is located on the q-axis, and a first permanent magnet magnetized in a direction orthogonal to the q-axis is buried in the permanent magnet insertion hole, one of the permanent magnets insertion hole is also located on the d-axis, and a second permanent magnet magnetized in a direction parallel to the d-axis is buried in the permanent magnet insertion hole, and at least one third permanent magnet buried in one of the permanent magnet insertion holes is provided between the first permanent magnet and the second permanent magnet.