Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric vehicle

Abstract

The present invention provides a rotor structure, a permanent magnet auxiliary synchronous reluctance motor and an electric vehicle. The rotor structure comprises a rotor body, the rotor body is provided with a permanent magnet slot group, the permanent magnet slot group comprises an outer layer of permanent magnet slot and an inner layer of permanent magnet slot, a magnetic conductive channel isformed between the adjacent outer layer of permanent magnet slot and inner layer of permanent magnet slot, at least one end of the magnetic conductive channel is provided with a deflection section, and a distance from the deflection section to a quadrature axis of the rotor body is gradually reduced outwards in a radial direction to allow the tail end of the magnetic conductive channel to be arranged close to the quadrature axis. The at least one end of the magnetic conductive channel is provided with the deflection section and the distance from the deflection section to the quadrature axis ofthe rotor body is gradually reduced outwards in a radial direction to optimize the magnetic circuit of the rotor structure and improve the reluctance torque of the motor, the shape of the permanent magnet slot is further improved to allow the whole demagnetization-resistant capacity of the rotor permanent magnet to be improved, reduce the motor torque pulsation, reduce the vibration and noise ofthe motor and improve the demagnetization-resistant capacity of the motor.

Description

technical field [0001] The invention relates to the technical field of motor equipment, in particular to a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric vehicle. Background technique [0002] Electric vehicles have the characteristics of energy saving and environmental protection, and have been developed rapidly. In order to achieve the functions of high power density and high efficiency of the existing electric vehicle drive motors, more and more motors use high-performance rare earth permanent magnet motors. Rare-earth permanent magnet motors can achieve high efficiency and high power density, mainly relying on high-performance rare-earth permanent magnets. Currently, NdFeB rare-earth permanent magnets are the most widely used. However, rare earth is a non-renewable resource, the price is relatively expensive, and the price of rare earth fluctuates greatly, resulting in high production costs of electric vehicle drive motors, whi...

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a rotor structure, permanent magnet assisted synchronous reluctance motor and electric vehicle, to solve the problem of low motor efficiency in the prior art

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