Adjustable pole-changing variable-speed permanent magnet synchronous motor
A permanent magnet synchronous and adjustable technology, applied to synchronous machines, electrical components, electromechanical devices, etc., can solve problems such as inability to self-start, low efficiency of dual-power motors, inability to change poles and speeds, etc.
Active Publication Date: 2016-05-18
冠龙电机有限公司
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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, cannot change poles and speeds, and have low efficiency of dual-power motors, and provide a small permanent magnet synchronous motor that can start asynchronously, change poles and speeds, and has high efficiency for small permanent magnet synchronous motors. magnetic synchronous motor
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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 adjustable pole-changing variable-speed permanent magnet synchronous motor adopts an adjustable rotor, and the motor stator winding adopts a non-pole-changing stator winding or a pole-changing stator winding.
[0048] The rotor core part of the adjustable rotor is mainly composed of two types of rotor cores: several permanent magnet cores and several adjustable 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 . Adjustable rotors are divided into pole-changing adjustable rotors and non-polar-changing adjustable rotors. The rotor core part of the pole-changing adjustable rotor is a pole-changing rotor core part including a pole-changing permane...
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The invention discloses an adjusting-type pole-changing speed-changing permanent-magnet synchronous motor and particularly relates to a method applied to the permanent-magnet synchronous motor. At a low-rotating-speed low-power output, a plurality of rotor main magnetic poles and a plurality of rotor auxiliary magnetic poles establish a low-rotating-speed rotor magnetic field together, and tangential adjustment of the magnetic field does not affect a magnetic flux density of a permanent-magnet rotor in an air gap of a motor. At a high-rotation-speed large-power output, the plurality of rotor main magnetic poles establish a high-rotation-speed rotor magnetic field together. Change of a magnetic flux closed path is assisted through the rotor so that the adjusting-type rotor is capable of changing the number of magnetic poles of the motor in an automatic adapting manner and thus pole changing and speed changing of the permanent-magnet synchronous motor are realized, and at the same time, tangential adjustment of the magnetic field increases the magnetic flux intensity of the permanent-magnet rotor in the air gap of the motor. Therefore, a counter electromotive force induced by each phase of winding of the motor under the two power states is smaller and approximate to an external-end voltage and the power factors of the motor under the two power states are both approximate to 1. The adjusting-type pole-changing speed-changing permanent-magnet synchronous motor is capable of realizing a two-power design.
Description
technical field [0001] The invention is an adjustable 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 nation...
Claims
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IPC IPC(8): H02K21/46
Inventor 赵晓东
Owner 冠龙电机有限公司