PMSM三相不对称转矩脉动抑制控制策略
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摘要
当永磁同步电机发生三相不对称故障时,电机转矩会产生脉动振荡。故障状态下,定子电流发生周期性的畸变,进而影响交轴电流i_q。根据PMSM运动方程和转矩方程可知,电机转矩与交轴电流i_q存在直接关系,所以抑制转矩脉动振荡最直接、最有效的方法在于抑制交轴电流发生振荡。文章采用基于迭代学习控制的方法,对参考q轴参考电流i_(qref)进行补偿,从而达到转矩脉动抑制的效果。
When three-phase asymmetric fault occurs in permanent magnet synchronous motor(PMSM), the motor torque will produce pulsating oscillation. In the fault state, the stator current periodically distorts, which affects the q-axis current i_q. According to the PMSM motion equation and the torque equation, it can be seen that there is a direct relationship between the motor torque and the q-axis currenti_q, so the most direct and effective way to suppress the torque ripple oscillation is to suppress the qaxis current oscillation. In this paper, the method based on Iterative Learning Control(ILC) is used to compensate the q-axis reference currenti_qref, so as to achieve the effect of torque ripple suppression.
When three-phase asymmetric fault occurs in permanent magnet synchronous motor(PMSM), the motor torque will produce pulsating oscillation. In the fault state, the stator current periodically distorts, which affects the q-axis current i_q. According to the PMSM motion equation and the torque equation, it can be seen that there is a direct relationship between the motor torque and the q-axis currenti_q, so the most direct and effective way to suppress the torque ripple oscillation is to suppress the qaxis current oscillation. In this paper, the method based on Iterative Learning Control(ILC) is used to compensate the q-axis reference currenti_qref, so as to achieve the effect of torque ripple suppression.
引文
[1]甘义震.带遗忘因子的变增益迭代学习控制算法研究[D].郑州大学,2018.
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[3]赵林峰,陈久闪,等.基于转角的迭代学习控制策略下永磁同步电机EPS转矩脉动抑制方法[J].中国机械工程,2017,28(24).
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[5]任武.永磁同步伺服电动机转矩脉动抑制方法研究[D].华中科技大学,2016.
[2]王硕,康劲松,等.电动汽车用永磁同步电机转矩脉动抑制方法综述[J].电源学报,2016,14(5):24-32.
[3]赵林峰,陈久闪,等.基于转角的迭代学习控制策略下永磁同步电机EPS转矩脉动抑制方法[J].中国机械工程,2017,28(24).
[4]贺科宁,徐蕾.永磁同步电机转矩脉动抑制的研究综述[J].时代农机,2017.
[5]任武.永磁同步伺服电动机转矩脉动抑制方法研究[D].华中科技大学,2016.