Built-in permanent-magnetic motor rotor and motor comprising same

A motor rotor and rotor technology, applied in the field of electric motors, can solve problems such as difficulty in meeting industrialization, low overload capacity, and low power density, and achieve the effects of improving overload capacity, reducing mechanical vibration, and increasing the number of fundamental waves

Inactive Publication Date: 2012-02-15
苏州和鑫电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the development of high-quality permanent magnet drive motors suitable for electric vehicles, there are still various technical bottlenecks, such as high noise, large torque fluctuations, low power density, low overload capacity and poor reliability. Meet the requirements of industrialization

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  • Built-in permanent-magnetic motor rotor and motor comprising same
  • Built-in permanent-magnetic motor rotor and motor comprising same
  • Built-in permanent-magnetic motor rotor and motor comprising same

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0022] Torque fluctuations caused by electromagnetic causes produce mechanical and electromagnetic noise, which affect the smooth operation and reliability of the motor. The torque, which fluctuates periodically with the spatial position, has nothing to do with the stator current; the other is the ripple torque, which is the harmonic torque caused by the difference between the current and back EMF waveforms. The torque fluctuation of permanent magnet synchronous motor for vehicle is the superposition of cogging torque and ripple torque. The motor industry and research institutes all over the world are doing research to reduce the torque fluctuation of the motor, such as the use of fractional slot method, auxiliary slot method, auxiliary tooth method, inclined slot method, oblique pole method, closed slot method and magnetized slot wedge method,...

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Abstract

The invention discloses a built-in permanent-magnetic motor rotor, which comprises a rotating shaft and a rotor iron core, wherein the rotor iron core comprises a pole shoe, at least one permanent magnet body is arranged inside the pole shoe, and the outer circle of the pole shoe is provided with a plurality of grooves. The invention also discloses a motor, which comprises a stator and the rotor. Due to the adoption of the built-in permanent-magnetic motor rotor, the waveform of an air gap field of the motor can be improved, fundamental wave times of the cogging torque fluctuation can be increased, the cogging fundamental wave and the ultra-harmonics torque amplitude can be reduced, and the torque fluctuation caused by the cogging can be reduced.

Description

technical field [0001] The invention relates to electric motors, in particular to the rotor of an electric motor, and also to an electric machine comprising the rotor. Background technique [0002] As a clean and energy-saving new type of transportation, electric vehicles have the biggest advantage of "zero emissions". Because it has no pollution during driving, low heat radiation, low noise, does not consume gasoline, can use a variety of energy sources, and is easy to use and maintain, it has become a hot spot in today's automobile research and development. The motor drive control system is the main executive structure in the driving process of electric vehicles, and its transmission system is the heart of electric vehicles. Among electric vehicles, there are three major types of fuel cell vehicles (FCV), hybrid electric vehicles (HEV) and pure electric vehicles (EV). All kinds of electric vehicles use electric motors to drive the wheels. Optimizing the structure of elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/24H02K21/00
Inventor 林德芳胡岗何平
Owner 苏州和鑫电气股份有限公司
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