Vehicle drive device

Abstract

When auxiliary field magnets (8a, 8b) are not provided, a magnetic flux passes through each of main field magnets (7a, 7b) and interlinks a stator winding (5) and a first rotor winding (6), while another magnetic flux passes through each of the main field magnets (7a, 7b) and short-circuits to adjacent main field magnets (7a', 7b'). The short-circuiting magnetic flux does not contribute to the generation of torque, and thus does not form a suitable inner peripheral magnetic circuit thereby reducing the torque transmitted between a second rotor (4) and a first rotor (3). Whereas, when the auxiliary field magnets (8a, 8b) are provided, the short-circuiting magnetic flux interlinks the first rotor winding (6) due to the auxiliary field magnets (8a, 8b) and forms an inner peripheral magnetic circuit thereby increasing the motor drive torque transmitted between the second rotor (4) and the first rotor (3).

Description

Technical field [0001] The present invention relates to a vehicle drive device, and more particularly, to a vehicle drive device that includes a stator, a first rotor, and a second rotor, and the second rotor is provided with a main field magnet and an auxiliary field magnet. Background technique [0002] Patent Document 1 describes a conventional vehicle drive device (a dual-rotor motor) having a first rotor and a second rotor. The vehicle driving device is arranged in a vehicle and has: a stator having stator windings arranged on the outermost circumference of the motor; a first rotor arranged on the innermost circumference of the motor, having rotor windings and driven by the engine; and a second rotor, It is arranged between the stator and the first rotor, has a magnetic field magnet, and drives the wheels. In one embodiment of the vehicle drive device, the second rotor holds the main field magnet, the inner peripheral auxiliary field magnet, and the outer peripheral auxilia...

AI Technical Summary

Problems solved by technology

Therefore, the torque of the inner peripheral magnetic circuit, that is, the magnetic torque between the first rotor and the second rotor does not necessarily increase, and there is a possibility that the torque request value of the inner peripheral magnetic circuit may not be satisfied.

Although there is a possibility that the inner peripheral torque can be increased by increasing the inner peripheral auxiliary field magnet, the outer peripheral torque may also be increased

Similarly, the torque of the outer peripheral magnetic circuit, that is, the torque between the second rotor and the stator does not necessarily increase, and there is a possibility that the torque request value of the outer peripheral magnetic circuit cannot be satisfied.

Therefore, in this embodiment, there is a problem that the torque of the outer circumference and the inner circumference cannot be freely designed and the torque of the inner circumference cannot be improved.

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