Enhanced type pole-changing speed-changing permanent-magnet synchronous motor
A permanent magnet synchronous and enhanced technology, applied to synchronous motors with stationary armatures and rotating magnets, synchronous machines, magnetic circuit rotating parts, etc., can solve problems such as inability to self-start, inability to change poles and speed
Active Publication Date: 2014-12-03
江苏中工高端装备研究院有限公司
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Problems solved by technology
[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 technical solution suitable for small permanent magnet synchronous motors that can start asynchronously, change poles and speed, and have 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 discloses an enhanced type pole-changing speed-changing permanent-magnet synchronous motor, and especially relates to a technical schema applied to a permanent-magnet synchronous motor. When the motor runs synchronously at a low speed, a plurality of rotor main magnetic poles and a plurality of rotor auxiliary magnetic poles together establish a low-rotating-speed rotor magnetic field. When the motor runs synchronously at a high speed, the plurality of rotor main magnetic poles together establish a high-rotating-speed rotor magnetic field. Through the change of a rotor auxiliary magnetic flux closed path, an enhanced type rotor can be automatically adaptive to transformation of a motor magnetic pole number so as to realize pole change and speed change of the permanent-magnet synchronous motor. At the same time, when the motor is asynchronously started, a tangential enhanced magnetic field does not increase the magnetic flux density of a permanent magnetic rotor in a motor air gap, generating brake toque generated by a permanent magnet is small, and the asynchronous starting performance of the enhanced rotor is improved. When the motor is synchronously started, the tangential enhanced magnetic field increases the magnetic flux density of the permanent magnetic rotor in the motor air gap and improves the synchronous operation performance and the power density of the enhanced type rotor.
Description
technical field [0001] The invention is an enhanced pole-changing and speed-changing permanent magnet synchronous motor, which relates to a technical solution applied 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 premis...
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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