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基于CCSFF-FPLL的PMSM位置估算误差抑制

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在基于滑模观测器的无位置传感器控制系统中,低通滤波器的使用会使反电动势产生相位延迟,在加减速工况下锁相环位置估计的动态性能较差,二者都会造成较大的位置估算误差.针对这两个问题,该文提出了一种基于CCSFF-FPLL的转子位置估算方法.该方法采用复系数同步频率滤波器(CCSFF)对反电动势进行滤波,利用其在中心频率处没有相位延迟和幅值衰减的特性来实现反电动势的准确提取;同时在传统锁相环的基础上增加了转速前馈的路径,设计了一种前馈锁相环(FPLL)来提取反电动势中的位置信息.仿真与实验结果表明,该文所提的方法能够有效抑制转子位置的估算误差,提高估算精度.
Error Suppression of PMSM Position Estimation Based on CCSFF-FPLL
In the sensorless control system based on sliding mode observer,the use of low-pass filter will cause phase delay of back electromotive force,and PLL has a poor dynamic performance of position estima-tion under acceleration and deceleration conditions,both of which will cause large position estimation errors.To solve these two problems,a rotor position estimation method based on CCSFF-FPLL was proposed in this paper.The method used a complex coefficient synchronous frequency filter(CCSFF)to filter the back elec-tromotive force,and realized the accurate extraction of the back electromotive force by its characteristic of no phase delay and amplitude attenuation at the center frequency.At the same time,a feedforward PLL(FPLL)was designed to extract the position information of the back electromotive force by adding aspeed feed-forward path to the traditional PLL.The experimental results show that the proposed method can effec-tively suppress the error of rotor position estimation and improve the estimation accuracy.

permanent magnet synchronous motorposition estimation error suppressionsliding mode ob-servercomplex coefficient synchronous frequency filter(CCSFF)feedforward PLL(FPLL)

曹江华、苏金章、赵世伟

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华南理工大学 电力学院,广州 510640

永磁同步电机 位置估算误差抑制 滑模观测器 复系数同步频率滤波器 前馈锁相环

广东省自然科学基金

2018A0303130221

2024

微电机
西安微电机研究所

微电机

CSTPCD
影响因子：0.431
ISSN：1001-6848
年,卷(期)：2024.57(8)