VEHICLE DRIVE APPARATUS

摘要

When sub-field magnets 8a and 8b are not provided, the magnetic fluxes that pass through main field magnets 7a and 7b respectively and interlink with stator windings 5 and first rotor windings 6, and the magnetic fluxes that pass through the main field magnets 7a and 7b respectively and short-circuit adjacent main field magnets 7b′ and 7a′ are generated. The short-circuited magnetic fluxes do not contribute to torque generation, therefore a favorable inner periphery magnetic circuit is not formed, and the torque received between a second rotor 4 and a first rotor 3 becomes small. When sub-field magnets 8a and 8b are provided, on the other hand, the short-circuited magnet fluxes interlink with the first rotor windings 6 by the sub-field magnets 8a and 8b, and an inner periphery magnetic circuit is formed, whereby the motor driving torque received between the second rotor 4 and the first rotor 3 increases.

主权项

1. A vehicle drive apparatus, comprising:
a stator that is fixed to a vehicle; a first rotor that is rotatably provided with respect to the stator; a plurality of first rotor windings that are provided along a circumferential direction of the first rotor; and a second rotor that is rotatably provided between the stator and the first rotor with respect to the stator, and that faces the stator on an outer peripheral surface forming an outer periphery field and faces the first rotor on an inner peripheral surface forming an inner periphery field, wherein the second rotor includes: a plurality of main field magnets, the magnet poles of which are in the radial direction to generate the outer periphery field and the inner periphery field; and a plurality of sub-field magnets which are provided in a position where a part of a magnetic flux passing through the main field magnet is interlinked with the first rotor windings, the magnetic pole directions thereof matching with each of the main field magnets, and wherein an inner periphery magnetic circuit is formed between the first rotor and the second rotor to receive torque therebetween, and an outer periphery magnetic circuit is formed between the second rotor and the stator to receive torque therebetween.