【摘要】 针对混合式永磁同步电机在伺服驱动场合应用范围有限的问题,基于其结构特点对弱磁性能进行了分析,并对控制策略进行了归纳与研究,提出了一种无传感器控制策略。在低速区采用恒电流频率比控制,高速区采用状态观测器反馈转子位置,并基于STM32 ARM Cortex-M4内核单片机搭建了实验平台,电机启动速度达到基速的15%即可切入闭环控制,能够将弱磁扩速至基速的4倍,验证了该控制策略的有效性。研究结果表明:混合式永磁同步电机具有优异的弱磁性能,且采用无传感器控制策略,能够在成本优势的基础上满足宽调速范围的伺服系统性能要求,拓展了驱动系统的应用范围。更多还原

【Abstract】 Aiming at the limited usage of hybrid permanent-magnet synchronous motor in servo-control applications,based on its structural features,the flux-weakening performance was analyzed,and the control strategies were summarized and studied. A sensorless control strategy was proposed which applies constant current-frequency ratio control in its low-speed range and uses state-observer as the feedback for rotor position during the high-speed range,the experimental platform based on STM32 ARM Cortex-M4 MCU was set up,the closed-loop control mode can be switched to when 20 percent of the base speed is reached,and the speed can be expanded to 4 times of the base speed,this verified the effectiveness of the control strategy. The results indicate that the hybrid permanent-magnet synchronous motor has excellent fluxweakening performance,and the sensorless control strategy can meet the performance requirements of the servo system with wide speed range on the basis of cost advantages. It expands the application range of the hybrid PMSM driving system.更多还原