分析了交流永磁同步电机控制环性能与逆变器的开关频率之间的关系，建立了电机电流环与速度环的数学模型。在此基础上采用经典的反馈控制原理，通过合理地配置反馈控制调节器的系数，指明了电机电流环的截止频率近似与逆变器开关频率成正比的关系，且满足足够的相位裕度。而在一定的范围内，逆变器开关频率对速度环的截止频率影响较小，速度环截止频率主要与电机系统自身的惯性时间常数有关，并满足一定的相位裕度。同时应用了一种特定的自适应噪声消除技术（ANC），通过自适应最小均方算法（LMS），对电流环与速度环的频率响应进行了在线辨识，进而可以得到控制环传递函数的波特图进行分析和比较研究。仿真结果与实验结果均验证了所提出新辨识方法的有效性和电流环与速度环数学模型的正确性。
Abstract
This paper analyzes the relationship between the control loop performance of permanent magnet synchronous motor and the switching frequency of the inverter, and establishes the mathematical model of the current loop and the velocity loop. On this basis, by choosing appropriate coefficients of the feedback regulator by using classical principle of feedback control, it is indicated that the cut-off frequency of the current loop is approximately proportional to the switching frequency of the inverter, with enough phase margin. But in a specific range, the switching frequency of the inverter has less impact on the cut-off frequency of the speed loop, which is in connection with the inertial time constant of permanent magnet synchronous motor. Meanwhile, specific adaptive noise canceling (ANC) is used by the least mean square (LMS) algorithm, frequency response of current loop and velocity loop can be identified online, and then the Bode diagram of transfer function is obtained, analyzed and compared. The simulation result and the experimental result confirm the validity of the new proposed identification method and the mathematical model of current loop and velocity loop.
关键词
电流环 /
速度环 /
截止频率 /
自适应噪声消除 /
最小均方算法
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Key words
current loop /
speed loop /
cut-off frequency /
adaptive noise canceling /
least mean square algorithm
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中图分类号：
TM341
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脚注
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基金
国家自然科学基金青年科学基金项目（51607077）
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