Rotor structure and permanent magnet auxiliary synchronous reluctance motor

Abstract

The invention provides a rotor structure and a permanent magnet auxiliary synchronous reluctance motor. The rotor structure comprises a rotor body, wherein the rotor body is provided with a permanentmagnet groove group, the permanent magnet groove group comprises a plurality of layers of permanent magnet grooves, a plurality of layers of permanent magnet grooves comprise a first permanent magnetgroove and a second permanent magnet groove section, the rotor structure further comprises a first permanent magnet and a second permanent magnet, a midpoint of a connecting line from the midpoint ofa side wall, close to an edge of the rotor body, of the first permanent magnet groove to an edge of the rotor body is P, the center of the rotor body serves as the circle center, a distance from the circle center to the point P serves as the radius, a circular arc is made in the circumferential direction of the rotor body, the sum of thicknesses of the first permanent magnet and the second permanent magnet at the intersection of the circular arc is M3, the perimeter of the circular arc is C1, M3 / C1 = T2, and T2 is larger than or equal to 45% and smaller than or equal to 70%. The rotor structure is advantaged in that the magnetic circuit of the rotor structure is optimized, so demagnetization resistance of the whole rotor structure is effectively improved, and motor efficiency of the rotorstructure with the structure is improved.

Description

technical field [0001] The invention relates to the technical field of motor equipment, in particular to a rotor structure and a permanent magnet assisted synchronous reluctance motor. 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 higher production costs of electric vehicle drive motors, which is very unfavora...

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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, to solve the problem of low motor efficiency in the prior art

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