Transition asynchronous start permanent magnet synchronous motor and pole changing and speed changing method

A permanent magnet synchronous and asynchronous starting technology, which is applied to synchronous motors, synchronous machines, and electric components with static armatures and rotating magnets.

Active Publication Date: 2016-06-08
江苏中工高端装备研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Transition asynchronous start permanent magnet synchronous motor and pole changing and speed changing method
  • Transition asynchronous start permanent magnet synchronous motor and pole changing and speed changing method
  • Transition asynchronous start permanent magnet synchronous motor and pole changing and speed changing method

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Embodiment Construction

[0045] The present invention is further described below in conjunction with accompanying drawing.

[0046] refer to Figure 1 to Figure 7 , Transition asynchronous start permanent magnet synchronous motor is mainly composed of stator parts and rotor parts. The rotor part is installed in the stator part, and the transitional asynchronous start permanent magnet synchronous motor adopts a transitional starting mode or a direct starting mode.

[0047] The stator part is mainly composed of the stator core 8, the stator winding 9 and the motor frame, the stator winding 9 is installed on the stator core 8, the stator core 8 and the stator winding 9 are installed in the motor frame, the inner cavity of the motor frame A bearing is respectively assembled on both axial sides, which are bearing one 19 and bearing two 20 respectively.

[0048] The rotor part is mainly composed of a rotating shaft 1, a buffer pad 1 2, a buffer pad 2 11, an open retaining ring 14, a magnetic isolation bush ...

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Abstract

The invention provides a transition asynchronous start permanent magnet synchronous motor and a pole changing and speed changing method and relates to a method applied to a permanent magnet synchronous motor. When the transition asynchronous start permanent magnet synchronous motor adopts a transition starting manner, a synchronous rotor iron core and one part of the radial outer surface of a permanent magnet leave away from the inner side of the inner surface of the iron core of the stator in a starting process, and the intensity of a rotor magnetic field established in a motor air gap of the permanent magnet is alleviated, so that a power generation braking torque generated by the permanent magnet is reduced, and the starting performance of the motor is easily improved. In a pole changing and speed changing synchronous operation process, a flux path of the rotor is changed, so that a rotor part of the transition asynchronous start permanent magnet synchronous motor can be automatically adaptive to change of the quantity of magnetic poles of the motor, so that the pole changing and speed changing of the permanent magnet synchronous motor can be realized.

Description

technical field [0001] The invention relates to a transition asynchronous start permanent magnet synchronous motor and a pole-changing and speed-changing method, which relates to a method applied to a permanent magnet synchronous motor, in particular to a permanent magnet which adopts a transition starting mode for asynchronous starting and pole-changing speed change method of synchronizing motors. 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 ...

Claims

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Application Information

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IPC IPC(8): H02K21/46H02K21/14H02K1/27H02K1/24
CPCH02K1/24H02K1/2726H02K1/2753H02K1/2766H02K21/14H02K21/46H02K2213/03
Inventor 赵晓东
Owner 江苏中工高端装备研究院有限公司
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