摘要
针对永磁同步电机无位置传感器的低速启动问题,对转速开环、电流闭环的单电流环启动法,即给定旋转电流矢量带动电机转子旋转启动进行了研究。采用单电流环启动的方法,开展了由单电流环模式切换到转速闭环模式运行的切换过程分析,提出了在启动及切换过程中增加d轴电流控制环节,即增大"转矩-功角自平衡"区域来优化启动与改进的切换方法,利用DSP构成的全数字交流控制系统对提出的方法在切换时电流冲击与功角差进行了测试。研究结果表明,所提出的启动与改进切换方法是可行的,能够使电机由零速平稳启动,在切换时电流与功角差变化大大减小,可以平滑地完成单电流环启动至转速闭环控制模式的切换,最终平顺地加速到额定运行状态。
Aiming at the problem of permanent magnet synchronous motor（ PMSM） sensorless starting at low speed,the method of open-loop speed and closed current loop was researched,which drives motor by given current vector. After the analysis of the transition from single current loop to speed closed loop control based on the startup of single current loop control,a method that d-axis current control was brought to increase ＂torque-power angle balance＂area was presented to optimize startup and transition. The current and power angle changes of transition in the proposed method were tested by digital AC control system using DSP. The results indicate that the proposed method is feasible to start and switch,the motor can start smoothly from zero speed. The current and power angle changes of transition are decreased rapidly,and the transition from single current loop to speed closed loop is smooth. Finally,the motor can be accelerated to normal operating mode.
出处
《机电工程》
CAS
2015年第1期74-77,共4页
Journal of Mechanical & Electrical Engineering
关键词
无位置传感器
永磁同步电机
切换
启动
sensorless
permanent magnet synchronous motor（PMSM）
transition
startup
