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CN102201770A 一种注入谐波电压抑制永磁同步电机谐波电流的控制方法 无效 - 撤回

  • 专利标题： 一种注入谐波电压抑制永磁同步电机谐波电流的控制方法
  • 专利标题（英）： Method for injecting harmonic voltage to restrain harmonic current of PMSM (permanent magnet synchronous motor)
  • 申请号： CN201110145038.4
    申请日： 2011-05-30
  • 公开(公告)号： CN102201770A
    公开(公告)日： 2011-09-28
  • 发明人: 廖勇 , 刘刃 , 姚骏 , 黄嵩
  • 申请人： 重庆大学
  • 申请人地址： 重庆市沙坪坝区沙正街174号
  • 专利权人： 重庆大学
  • 当前专利权人： 重庆大学
  • 当前专利权人地址： 重庆市沙坪坝区沙正街174号
  • 主分类号： H02P6/08
  • IPC分类号： H02P6/08 ;  H02P6/16 ;  H02P21/14 ;  H02J3/01
一种注入谐波电压抑制永磁同步电机谐波电流的控制方法
摘要：
一种注入谐波电压抑制永磁同步电机谐波电流的控制方法，其特征在于：该方法在实时提取永磁同步电机中的谐波电流分量的基础上，通过加入谐波电流抑制环的方式，实现对谐波电流的闭环控制，进而计算得到为抑制永磁同步电机5、7次谐波电流所需注入的谐波电压分量，并将得到的谐波电压分量注入到永磁同步电机调速系统中的三相控制电压中，抵消永磁同步电机运行时电机电流中的5、7次谐波分量，达到了抑制5、7次谐波电流的目的。该方法不仅可以避免传统的抑制谐波电流方式中需准确检测电流过零点的技术难点，而且能够明显地改善电机电流波形，同时有效抑制因逆变器非线性特性及电机气隙磁场畸变造成的电机5、7次谐波电流，有效减少由5、7次谐波电流分量引起的附加损耗，降低永磁同步电机电磁转矩和转速脉动，提高永磁同步电机的运行效率及运行可靠性。
摘要（英）：

The invention provides a method for injecting a harmonic voltage to restrain a harmonic current of a PMSM (permanent magnet synchronous motor), which is characterized in that a ring to restrain the harmonic current is added to realize the closed-loop control for the harmonic current on the basis of extracting harmonic current components in the PMSM in real time, thus calculating to obtain harmonic voltage components which are required to be injected to restrain 5-order and 7-order harmonic currents of the PMSM; and then the obtained harmonic voltage components are injected into a three-phase control voltage in a speed control system of the PMSM so as to offset the 5-order and 7-order harmonic components in a motor current when the PMSM runs, thereby reaching the purpose of restraining the 5-order and 7-order harmonic currents. The method is used to solve the technical difficulty that current ZCP (zero crossing point) is required to detect accurately in a traditional mode to restrain the harmonic current, remarkably improves the current waveform of the motor, effectively restrains the 5-order and 7-order harmonic currents caused by the nonlinear characteristics of an inverter and the air-gap field distortion of the motor, effectively reduces the additional loss caused by the 5-order and 7-order harmonic current components, reduces the electromagnetic torque and the revolving speed pulse of the PMSM and improves the running efficiency and the running reliability of the PMSM.

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