Enhanced pole-changing variable-speed permanent magnet synchronous motor
A permanent magnet synchronous, enhanced technology, applied in synchronous motors with static armatures and rotating magnets, synchronous machines, magnetic circuit rotating parts, etc.
Active Publication Date: 2016-07-06
江苏中工高端装备研究院有限公司
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[0005] The purpose of the present invention is to overcome the shortcomings of traditional small permanent magnet synchronous motors that cannot be self-started and pole-changing and speed-changing, and provide a small permanent magnet synchronous motor that can start asynchronously, change poles and speed, and has a large motor power density.
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[0046] The present invention is further described below in conjunction with accompanying drawing.
[0047] refer to figure 1 , figure 2 , image 3 , Figure 8 , Figure 9 , Figure 10 and Figure 11 , The rotor of the enhanced pole-changing variable-speed permanent magnet synchronous motor adopts the enhanced rotor, and the motor stator winding adopts non-polar-changing stator windings or pole-changing stator windings.
[0048]The rotor core part of the reinforced rotor is mainly composed of two types of rotor cores: several permanent magnet cores and several reinforced squirrel cage cores 7 . The permanent magnet core has two structures of the pole-changing permanent magnet core 5 and the non-pole-changing permanent magnet core 32 . Enhanced rotors are divided into pole-changing enhanced rotors and non-polar-changing enhanced rotors. The rotor core part of the pole-changing reinforced rotor is a pole-changing rotor core part including a pole-changing permanent magnet...
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The invention is an enhanced pole-changing and speed-changing permanent magnet synchronous motor, which relates to a permanent magnet synchronous motor. When the motor runs synchronously at low speed, several rotor main poles and several rotor auxiliary poles jointly establish a low speed rotor magnetic field. When the motor runs synchronously at high speed, several main magnetic poles of the rotor jointly establish a high-speed rotor magnetic field. Through the change of the closed path of the auxiliary magnetic flux of the rotor, the enhanced rotor can automatically adapt to the number of magnetic poles of the motor, and realize the pole-changing and speed-changing of the permanent magnet synchronous motor. At the same time, when the motor starts asynchronously, the tangentially enhanced magnetic field will not increase the magnetic flux density of the permanent magnet rotor in the air gap of the motor, and the generating braking torque generated by the permanent magnet is small, which improves the asynchronous starting performance of the enhanced rotor. When the motor is running synchronously, the tangentially enhanced magnetic field will increase the magnetic flux density of the permanent magnet rotor in the air gap of the motor, and improve the synchronous operation performance and power density of the enhanced rotor.
Description
technical field [0001] The invention is an enhanced pole-changing and speed-changing permanent-magnet synchronous motor, which relates to a permanent-magnet synchronous motor, in particular to a permanent-magnet synchronous motor capable of asynchronous starting and pole-changing and speed-changing. Background technique [0002] AC asynchronous motors have low efficiency, while permanent magnet synchronous motors have high efficiency, high power factor, and remarkable energy-saving effect. Therefore, permanent magnet synchronous motors are gradually replacing AC asynchronous motors as mainstream motors. Ordinary permanent magnet synchronous motors cannot start automatically and need to be equipped with a frequency converter, but the cost of the frequency converter is relatively high. The asynchronous start permanent magnet synchronous motor does not need to be equipped with a frequency converter, which can reduce equipment costs on the premise of saving energy. The national...
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IPC IPC(8): H02K21/46H02K21/14H02K1/27H02K1/24
Inventor 赵晓东
Owner 江苏中工高端装备研究院有限公司