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Method and device for detecting 6i-order electromagnetic torque fluctuation of permanent magnet synchronous motor

A permanent magnet synchronous motor, electromagnetic torque technology, used in the control of electromechanical transmission, control of generators, motor-generator control and other directions

Inactive Publication Date: 2015-11-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, few existing analytical models consider both stator slotting and rotor magnetic field harmonics

Method used

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  • Method and device for detecting 6i-order electromagnetic torque fluctuation of permanent magnet synchronous motor
  • Method and device for detecting 6i-order electromagnetic torque fluctuation of permanent magnet synchronous motor
  • Method and device for detecting 6i-order electromagnetic torque fluctuation of permanent magnet synchronous motor

Examples

Experimental program
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Embodiment

[0044] Such as figure 1 As shown, a 6i-order electromagnetic torque fluctuation detection method for a permanent magnet synchronous motor includes the following steps:

[0045] 1) Input the magnetic field structure parameter information of the permanent magnet synchronous motor with slotted stator, including the residual magnetism B of the permanent magnet r , polar arc coefficient α p , number of pole pairs p, permanent magnet arc radius R m , Rotor core arc radius R r , Stator core arc radius R s , air gap length μ r , permanent magnet thickness g, permanent magnet relative permeability h m , winding pitch y 1 , number of slots Q s and slot width b 0 and other information.

[0046] 2) Calculate the magnetic permeability of the stator air gap area according to the magnetic field structure parameter information, and determine the magnetic field when the stator is not slotted, and the magnetic field B when the slot is not slotted PM-less (θ 1 ) in [(2i-1)p] 2 When -...

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Abstract

The invention relates to a method and a device for detecting a 6i-order electromagnetic torque fluctuation of a permanent magnetic synchronous motor. The device comprises a parameter information input module, a calculation processing module and an output module. The method comprises the following steps: firstly inputting the magnetic field structural parameter information of the permanent magnetic synchronous motor into the parameter information input module, then processing the information by the calculation processing module to obtain a torque fluctuation; and subsequently outputting a final result through the output module or processing an intermediate result generated in the process. Compared with the prior art, the grooving condition of the stator and the magnetic field harmonics of the rotor are taken into consideration, so that the accuracy of detection result is greatly improved.

Description

technical field [0001] The invention relates to a detection method and device for a permanent magnet synchronous motor, in particular to a detection method and device for a 6i-order electromagnetic torque fluctuation of a surface-mounted permanent magnet synchronous motor considering stator slotting and rotor magnetic field harmonics. Background technique [0002] Many types of surface mounted permanent magnet synchronous motors (SPMSM) are used as direct drive motors for electric vehicles, which have the advantages of short transmission chain, efficient transmission, compact structure, high power density and wide speed range advantage. However, its 6i order (i∈N) torque fluctuation will cause order vibration of the motor assembly and the electric vehicle body. [0003] For the 6i order torque fluctuation of the permanent magnet synchronous motor, some literatures have analyzed the mechanism of the 6th order harmonic torque fluctuation, and discussed the suppression method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/18H02P21/20
Inventor 马琮淦左曙光谭钦文孙庆孟姝高丽华
Owner TONGJI UNIV