Asynchronous starting permanent magnet synchronous motor rotor based on permanent magnets with different residual magnetic densities
A permanent magnet synchronous and asynchronous starting technology, which is applied to the rotating parts of the magnetic circuit, the shape/style/structure of the magnetic circuit, etc., can solve the problems of increased torque fluctuation, increased vibration noise, increased harmonic loss, etc., to achieve Reduce the sine distortion rate, reduce the torque ripple, reduce the effect of vibration and noise
Active Publication Date: 2015-04-08
SHENYANG POLYTECHNIC UNIV
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Problems solved by technology
[0002] The asynchronous start permanent magnet synchronous motor using rare earth permanent magnet materials is expensive because of the high price of rare earth materials, which makes the cost of rare earth permanent magnet motors high, which is not conducive to market promotion; The gap flux density waveform is relatively close to a square wave, and due to the existence of the stator and rotor slots, a large number of harmonics are introduced into the no-load air gap flux density, resulting in increased harmonic losses, affecting motor efficiency, and increasing torque fluctuations , so that the output of the motor is not stable, thereby increasing the vibration and noise
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Embodiment 1
[0016] figure 1 It is a schematic diagram of the rotor structure under one magnetic pole in an embodiment of the present invention;
[0017] figure 2 It is a schematic diagram of the rotor structure of an embodiment of the present invention;
[0018] image 3 It is the no-load air-gap magnetic density waveform of a four-pole asynchronous start permanent magnet synchronous motor with a W-shaped permanent magnet structure and a rated power of NdFeB permanent magnet material of 37kW;
[0019] Figure 4 It is an asynchronous starting permanent magnet synchronous motor rotor air-gap flux density waveform diagram of an embodiment of the present invention.
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The invention relates to an asynchronous starting permanent magnet synchronous motor rotor based on permanent magnets with different residual magnetic densities, and belongs to the field of permanent magnet motors. The asynchronous starting permanent magnet synchronous motor rotor comprises a rotating shaft, a starting cage, a rotor iron core and the permanent magnets, wherein 2p VVV-shaped permanent magnet slots encircling the rotating shaft are uniformly formed in the rotor iron core; a first permanent magnet and a second permanent magnet are arranged in a first V-shaped slot; a third permanent magnet and a fourth permanent magnet are arranged in a second V-shaped slot; a fifth permanent magnet and a sixth permanent magnet are arranged in a third V-shaped slot; and magnetism isolation slots are reserved between the permanent magnets. On the premise that the stable-state running performance is not reduced, the cost of an asynchronous starting permanent magnet synchronous motor is effectively reduced, and the no-load air gap magnetic density waveform sine distortion rate is reduced; harmonic waves are effectively suppressed; the efficiency of the motor is improved; the torque ripple is reduced; and the vibration noise is reduced.
Description
technical field [0001] The invention belongs to the field of permanent magnet motors, in particular to an asynchronous start permanent magnet synchronous motor rotor based on permanent magnets with different residual magnetic densities. Background technique [0002] The asynchronous start permanent magnet synchronous motor using rare earth permanent magnet materials is expensive because of the high price of rare earth materials, which makes the cost of rare earth permanent magnet motors high, which is not conducive to market promotion; The gap flux density waveform is relatively close to a square wave, and due to the existence of the stator and rotor slots, a large number of harmonics are introduced into the no-load air gap flux density, resulting in increased harmonic losses, affecting motor efficiency, and increasing torque fluctuations , so that the output of the motor is not stable, which in turn increases the vibration and noise. Contents of the invention purpose of...
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IPC IPC(8): H02K1/27
Inventor 唐任远安忠良张霄霆
Owner SHENYANG POLYTECHNIC UNIV
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