Rotor, permanent magnet motor, motor driving system and automobile

A technology for permanent magnet motors and rotors, applied in the fields of rotors, permanent magnet motors, motor drive systems and automobiles, which can solve the problems of further improvement of the magnetic modulation range and large magnetic modulation current, so as to improve the magnetic modulation range and magnetic modulation ability Boost and desaturation effects

Active Publication Date: 2021-05-07
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a rotor, a permanent magnet motor, a motor drive system and an automobile, which can effectively improve the range of magnetic adjustment of the motor and solve the adjustment required by the existing motor. The magnetic current is large, and the magnetic adjustment range needs to be further improved

Method used

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  • Rotor, permanent magnet motor, motor driving system and automobile
  • Rotor, permanent magnet motor, motor driving system and automobile
  • Rotor, permanent magnet motor, motor driving system and automobile

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Embodiment Construction

[0049] The terms used in the embodiments of the present application are only used to explain specific embodiments of the present application, and are not intended to limit the present application.

[0050] With the need for the mileage of the car, the high efficiency of the motor has become one of the focuses of research. However, the air-gap magnetic field of the traditional PMSM (permanent-magnet synchronous motor, permanent magnet synchronous motor) is not adjustable, which limits the speed range. There are two relatively contradictory problems of "low speed, high torque" and "high speed, high power". That is, from the perspective of low speed climbing, a large permanent magnet flux linkage is required to obtain a large torque coefficient and torque density. Starting from high-speed performance, a smaller permanent magnet flux linkage is required to improve the high-speed output capability, which in turn affects the improvement of the overall efficiency of the motor. The pe...

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Abstract

A rotor is used in a permanent magnet motor and comprises a rotating shaft (111) and a rotor iron core (112) sleeved on the rotating shaft (111). The motor further comprises a plurality of first permanent magnet structures (14), the first permanent magnet structures (14) are distributed on the rotor core (112) in the circumferential direction of the rotor core (112), each first permanent magnet structure (14) comprises a first permanent magnet (141) and a second permanent magnet (142) which are arranged in the radial direction of the rotor core (112), and the coercive force of the first permanent magnet (141) is smaller than that of the second permanent magnet (142). Therefore, the air gap main magnetic flux can be regulated and controlled through the magnetization and demagnetization degrees of the first permanent magnets with low coercive force, and part of the main magnetic flux is short-circuited through the first permanent magnets with low coercive force during magnetic weakening, so that the short circuit of magnetic lines in the rotor is realized during magnetic weakening of a permanent magnetic field, the saturation of a magnetic circuit is reduced, and the magnetic adjusting range is effectively expanded.

Description

technical field [0001] The present application relates to the technical field of motors, in particular to a rotor, a permanent magnet motor, a motor drive system and an automobile. Background technique [0002] The permanent magnet memory motor is a new type of flux controllable permanent magnet motor. It uses a low coercivity alnico permanent magnet to generate a circumferential magnetic field through the stator winding or DC pulse winding, thereby changing the magnetization of the permanent magnet. The gap magnetic field is adjusted, and the low coercivity permanent magnet has the characteristic that the magnetic density level can be memorized. Among them, the hybrid permanent magnet adjustable flux memory motor is a motor composed of two kinds of permanent magnets. The magnetic circuit motor is divided into parallel type and series type according to the arrangement of the two permanent magnets. The parallel type has the advantage of small demagnetization circuit pulse. ,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/02
CPCH02K1/2706H02K1/2753H02K1/02Y02T10/64H02K1/2773B60K1/00
Inventor 黄鑫李孟德阳辉林鹤云
Owner HUAWEI TECH CO LTD
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