Complex Vector Current Regulator Suppresses High-Order Harmonics of High-Speed Permanent Magnet Motor
When the permanent magnet motor runs at high speed,the content and amplitude of the stator current higher harmonics increase rapidly,which increases the eddy current loss,heat generation and torque ripple.This paper studies the improvement of the voltage compensation algorithm to suppress the stator current higher harmonics.In this paper,a complex vector current regulator is designed to improve the decoupling performance and dynamic response to improve the current harmonics of traditional voltage compensation,aiming at the strong coupling of AC and direct axis current components and the nonlinear change of motor parameters in the operation of high-speed permanent magnet synchronous motor.Suppression algorithm.First,a co-simulation model integrating the high-speed permanent magnet synchronous motor model,the high-speed motor field weakening control and the harmonic suppression algorithm was built.On this basis,the software-in-the-loop simulation method was used to verify the significant superiority of the complex vector current regulator compared to the traditional voltage compensation algorithm.The simulation results show that the complex vector current regulator greatly reduces the higher harmonic content of the stator current,the to-tal THD and the torque ripple.This can provide important theoretical and methodological guidance for the suppression and simulation analysis of high-order harmonics of high-speed permanent magnet motors.
High-speed permanent magnet motorHigher current harmonicsVoltage compensationComplex vector current regulatorTorque rippleHarmonic suppression
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