Starting method and apparatus of permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and motor rotor, applied in the direction of starting device, etc., can solve the problem of permanent magnet motor starting failure and other problems

Inactive Publication Date: 2016-09-28
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for starting a permanent magnet synchronous motor, which solves the problem in the prior art that the permanent magnet motor fails to start due to the angle difference between the preset position and the actual position of the motor rotor

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  • Starting method and apparatus of permanent magnet synchronous motor
  • Starting method and apparatus of permanent magnet synchronous motor
  • Starting method and apparatus of permanent magnet synchronous motor

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] The permanent magnet synchronous motor in the embodiment of the present invention can be applied to air conditioners, refrigerators, fans and the like. Such as figure 1 As shown, the permanent magnet in the embodiment of the present invention includes a stator 100 and a rotor 200, wherein the stator is equipped with a stator core 130 and a coil (not marked in the figure), the stator core 130 includes a plurality of teeth 120, and the coil is wound by T...

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Abstract

Embodiments of the present invention provide a method and device for starting a permanent magnet synchronous motor, which relate to the field of motors and solve the problem of failure to start the permanent magnet motor in the prior art due to the angle difference between the preset position and the actual position of the motor rotor The problem. The method includes: by determining the angle difference θ between the preset angle and the actual angle of the motor rotor 1 ; Secondly, the angle difference θ 1 Divided into N equal sub-angle differences, where the angle value of each sub-angle difference is Δθ; then, according to the angle difference θ 1 The load current determined by the initial current of the motor stator and the angle value Δθ of the sub-angle difference, gradually reduce the angle difference θ 1 decrease; finally, when the angle difference θ 1 When reduced to 0, the permanent magnet synchronous motor is started. The invention is applied to the starting of the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to the field of motors, in particular to a starting method and device for a permanent magnet synchronous motor. Background technique [0002] A permanent magnet synchronous motor includes a rotor and a stator, wherein permanent magnets are arranged in the rotor, and the permanent magnets generate a fixed magnetic field. When current is passed into the stator of the permanent magnet synchronous motor, a rotating magnetic field will be generated, which will drive the magnetic poles of the rotor to rotate, thereby realizing the synchronous operation of the permanent magnet synchronous motor. [0003] In general, when the permanent magnet synchronous motor is started, the position of the rotor needs to be determined first, and then according to the position of the rotor, the permanent magnet synchronous motor is controlled to drive the load to work normally. In the prior art, when the permanent magnet synchronous motor starts normall...

Claims

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Application Information

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IPC IPC(8): H02P6/21
Inventor 张俊喜李希志张平
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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