Rotor punching sheet, motor rotor and permanent magnet synchronous motor
A rotor punching and magnetic pole technology, applied in the field of motors, can solve the problems of motor output capability, poor efficiency vibration and acoustic and vibration roughness, large harmonic content, large back EMF waveform distortion, etc.
Pending Publication Date: 2021-09-10
WUXI INFIMOTION TECH CO LTD +1
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Problems solved by technology
However, the permanent magnet synchronous motor with the above-mentioned rotor structure has a large distortion of the back EMF waveform and a large harmonic content in the load state and deep field weakening, which makes a great contribution to the harmonic iron loss and torque ripple of the motor, resulting in the The output capability, efficiency and NVH (Noise, Vibration, Harshness-noise, vibration and harshness) at high speed are poor
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[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0037] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the relationship between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly.
[0038] In addition, if there are descriptions involving "first", "second" and so on in the...
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The invention discloses a rotor punching sheet, a motor rotor and a permanent magnet synchronous motor. The rotor punching sheet is provided with a shaft hole and a plurality of magnetic pole installation positions which are annularly arranged at the periphery of the shaft hole. The magnetic pole installation position is provided with a first magnetic steel groove, a second magnetic steel groove, a third magnetic steel groove, a fourth magnetic steel groove and a first empty groove, an included angle is formed between the first magnetic steel groove and the second magnetic steel groove, and the distance between the first magnetic steel groove and the second magnetic steel groove is gradually reduced in the direction towards the shaft hole. The third magnetic steel groove is arranged on one side, facing the shaft hole, of the first magnetic steel groove, the fourth magnetic steel groove is arranged on one side, facing the shaft hole, of the second magnetic steel groove, and the first empty groove is arranged between the first magnetic steel groove and the second magnetic steel groove. According to the technical scheme, the counter electromotive force harmonic content and the torque ripple in the load state can be reduced, so that the motor noise is reduced, and the conversion efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of motors, in particular to a rotor punch, a motor rotor and a permanent magnet synchronous motor. Background technique [0002] With the intensification of the world energy crisis and environmental pollution, my country and other countries in the world are stepping up the development of electric vehicles, and the drive motor is one of the core components of new energy vehicles, and its performance has a direct impact on the performance of the vehicle. Relationship. In most of the permanent magnet synchronous motors on the electric drive system for vehicles currently on the market, in order to reduce costs, most of the rotor structures adopt magnetic circuit topologies such as "double flat", "single V" and "double V". . However, the permanent magnet synchronous motor with the above-mentioned rotor structure has a large distortion of the back EMF waveform and a large harmonic content in the load state and de...
Claims
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IPC IPC(8): H02K1/27H02K21/02
CPCH02K1/2766H02K21/022H02K2213/03
Inventor 刘波方亮王振刘飞韩韬谭艳军林霄喆王瑞平肖逸阁
Owner WUXI INFIMOTION TECH CO LTD