摘要
永磁同步电机调速控制系统通常采用转矩公式直接计算d-q轴电流的给定值,但其对电机参数敏感,难以运行于最佳工作点;无位置传感器控制通常采用高频正弦波注入法,但滤波器的使用降低了系统的带宽及响应速度。本文提出将通过输入高频方波对无传感器位置观测与虚拟方波注入的MTPA应用于永磁同步电机控制系统,形成一种复合控制策略,由虚拟方波注入的MTPA对电机进行控制,通过对电流环注入高频方波,由高频电流信号来得到电机的转子位置信息,实现永磁同步电机的复合控制。通过仿真验证了所提控制策略的有效性。
The Permanent Magnet Synchronous Motor(PMSM)speed control systems typically calculate d-q axis current references directly using torque formulas,but these methods are sensitive to motor parameters and struggle to operate at the optimal working point.Sensorless control often employs high-frequency sinusoidal injection,but the use of filters reduces system bandwidth and response speed.This paper proposes a composite control strategy that integrates sensorless position estimation via high-frequency square-wave injection and Maximum Torque Per Ampere(MTPA)control based on virtual square-wave injection.The strategy applies virtual square-wave-injected MTPA to control the motor,injects high-frequency square waves into the current loop,and extracts rotor position information from the high-frequency current signals,achieving composite control of the PMSM.Simulation results verify the effectiveness of the proposed control strategy.The speed control system of a permanent magnet synchronous motor(PMSM)typically employs the torque formula to directly compute the reference value for the d-q axis current.However,this method is sensitive to motor parameters and poses challenges in achieving optimal operating points.Sensorless control often utilizes the high-frequency sine wave injection method,but the implementation of filters can diminish the system's bandwidth and response speed.This paper proposes a novel composite control strategy that integrates the Maximum Torque Per Ampere(MTPA)derived from sensorless position observation with virtual square wave injection,achieved through the application of high-frequency square wave inputs to the permanent magnet synchronous motor control system.In this approach,the motor is regulated by the MTPA introduced by the virtual square wave.The high-frequency square wave is injected into the current loop,allowing for the extraction of rotor position information from the high-frequency current signal,thereby facilitating the composite control of the PMSM.The effectiveness of the proposed control strategy is validated through simulation results.
作者
尹昊
祝龙记
YIN Hao;ZHU Longji(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,China)
出处
《华北科技学院学报》
2025年第5期80-84,共5页
Journal of North China Institute of Science and Technology
基金
国家自然科学基金资助项目(U1610120)。
关键词
永磁同步电机
MTPA
虚拟方波
无位置传感
permanent magnet synchronous motor
MTPA
virtual square wave
no position sensing
