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Hybrid excitation permanent magnet brushless motor for electric vehicle

A permanent magnet brushless motor and combined excitation technology, which is applied to electric vehicles, motors, vehicle parts, etc., can solve the problems of high cost and unstable supply of rare earth permanent magnet materials, reduce the risk of irreversible demagnetization, and increase the amount of use , Improve the effect of permanent magnet torque

Active Publication Date: 2016-02-17
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of high cost and unstable supply of rare earth permanent magnet materials, and provide a combined excitation permanent magnet brushless motor for electric vehicles with simple structure, high reliability, high torque and high power density

Method used

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  • Hybrid excitation permanent magnet brushless motor for electric vehicle
  • Hybrid excitation permanent magnet brushless motor for electric vehicle
  • Hybrid excitation permanent magnet brushless motor for electric vehicle

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Embodiment Construction

[0031] see figure 1 , The present invention is a combination of less rare earth excitation width and speed regulation permanent magnet brushless motor, which adopts an external stator structure, including a stator 1, a rotor 2 and a rotating shaft 10. The rotor 2 is coaxially located inside the stator 1 , and the center of the rotor 2 is used for placing the rotating shaft 10 . There is an air gap between the inner wall of the stator 1 and the outer wall of the rotor 2, and the thickness of the air gap is related to the power level of the motor, the selected permanent magnet material, and the processing and assembly process of the stator 1 and the rotor 2. Both the stator 1 and the rotor 2 are laminated with silicon steel sheets with a thickness of 0.35mm, and the lamination coefficient is 0.95.

[0032]The rotor 2 is embedded with two layers of permanent magnet steel inside and outside, the two layers of permanent magnet steel are evenly arranged along the circumferential di...

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Abstract

The invention discloses a hybrid excitation permanent magnet brushless motor for an electric vehicle. A rotor is internally embedded with an inner layer of permanent magnetic steels and an outer layer of permanent magnetic steels distributed uniformly along the circumferential direction; V-type NdFeB permanent magnetic steels are in the outer layer; spoke-shaped ferrite permanent magnetic steels are in the inner layer; the two kinds of permanent magnetic steels are located on the same pole; the NdFeB permanent magnetic steels and the ferrite permanent magnetic steels are symmetrical about the central axis of the pole; the V-type openings of the NdFeB permanent magnetic steels face the ferrite permanent magnetic steels; each NdFeB permanent magnetic steel is composed of a first NdFeB permanent magnetic steel and a second NdFeB permanent magnetic steel which are the same and are symmetrical about the central axis of the pole; and the top parts of the V-type openings of the NdFeB permanent magnetic steels and the outer ends of the ferrite permanent magnetic steels are directly fixedly connected. by adopting a rare earth permanent magnetic steel and ferrite hybrid excitation mode, parallel connection of the two kinds of permanent magnetic steel main magnetic circuits is realized, and torque density and power density of the motor are further improved.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, and particularly refers to a permanent magnet brushless motor which is suitable for electric vehicles and other applications requiring high torque density, high power density and high-efficiency driving performance. Background technique [0002] High-performance permanent magnet brushless motors have been successfully used in the drive system of automobiles due to their advantages of small size, high torque density, high power density, high efficiency, and good dynamic response. However, due to the rising prices of rare earth permanent magnet materials in permanent magnet brushless motors and the increasingly unstable supply chain, the development of permanent magnet brushless motors has been seriously hindered. In order to reduce the manufacturing cost of the motor without affecting the torque output of the motor, it has become a current research focus, and non-rare earth motors and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/14H02K3/12
CPCY02T10/64
Inventor 全力顾玮玮朱孝勇杜怿
Owner JIANGSU UNIV
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