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Modeling method of twelve-phase permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and modeling method, applied in the direction of design optimization/simulation, etc., can solve the problem of low accuracy of calculation results, and achieve the effect of improving accuracy

Active Publication Date: 2020-02-07
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The commonly used PMSM linear model is established on the premise that the stator winding and the permanent magnet flux linkage are in a standard sinusoidal distribution, which is quite different from the actual situation, so the calculation result The accuracy is not high

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  • Modeling method of twelve-phase permanent magnet synchronous motor
  • Modeling method of twelve-phase permanent magnet synchronous motor
  • Modeling method of twelve-phase permanent magnet synchronous motor

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Embodiment Construction

[0057] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0058] Considering the modeling method of stator winding and rotor magnetic field harmonics and the simulation of its control system, the specific implementation steps of the present invention include the following parts.

[0059] (1) Establish the voltage equation and flux linkage equation of the twelve-phase permanent magnet synchronous motor in the natural coordinate system, construct the inductance coefficient matrix, and according to the winding function, establish the analysis of the self-inductance and mutual inductance of the stator windings of each phase considering the harmonic winding Mode.

[0060] The basic equations of the voltage and flux linkage of the twelve-phase permanent magnet synchronous motor in the natural coordinate syst...

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Abstract

The invention discloses a modeling method of a twelve-phase permanent magnet synchronous motor, wherein a harmonic winding is considered, and the method comprises the following steps: 1) constructinga twelve-phase permanent magnet synchronous motor inductance coefficient matrix, and establishing an analytic expression considering the self-inductance and mutual inductance of each phase stator winding of the harmonic winding according to a winding function; 2) establishing an analytic expression of fundamental wave flux linkage and harmonic wave flux linkage generated by the permanent magnet in each phase of stator winding; and 3) determining the optimal coefficients of the stator inductance and the permanent magnet flux linkage by using a Matlab curve fitting function. According to the method, the harmonic winding having significant influence on the motor characteristics is considered in the modeling process of the twelve-phase permanent magnet synchronous motor, which has important theoretical significance for improving the accuracy of analysis and control of the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to a nonlinear modeling method of a multi-phase motor, in particular to a modeling method of a twelve-phase permanent magnet synchronous motor (PMSM) considering harmonic windings. Background technique [0002] In recent years, multi-phase motors have been more and more widely used in some large-scale AC speed control systems. Compared with traditional three-phase motors, multi-phase motors have more prominent advantages in high-power and high-reliability occasions: ①It can be used more Small capacity devices achieve high power. ②The multi-phase motor system can realize redundant control, which greatly improves the system reliability. ③ Reduce torque ripple. ④ Reduce DC bus current harmonics. [0003] The model of the motor is the basis for studying the operating characteristics of the motor and its control system. In the analysis of the operating characteristics of high-power PMSM, high-precision PMSM position, speed control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
Inventor 肖烨然邵俊波邱长青龙文枫刘念洲
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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