作　　者： (刘志宏）; (伍嘉伟）;

机构地区： 华中科技大学自动化学院

出　　处： 《变频器世界》 2017年第8期67-70,101,共5页

摘　　要： 针对永磁同步电机(PMSM)的中高速应用场合,采用了一种基于扩展反电动势全阶滑模观测器估算算法对电机转速和转子位置进行估算,针对该估算算法在零速及低速估算精度不够,不能用于启动及低速控制的情况,采用了I/F开环启动策略,并采用了一种减小给定q轴电流的方法来实现从I/F开环启动策略平滑切换到基于扩展反电动势全阶滑模观测器的双闭环矢量控制。仿真结果验证了所采用无位置传感器控制整体控制方案的可行性与有效性。 In order to achieve sensorless control of permanent magnet synchronous motor（PMSM） in full speed range, a full-order sliding mode observer based on the extended back electromotive force model was used for rotor position and speed estimation, in order to solve the problem that this estimation algorithm can not be used for control because of the accuracy of the observer is low in the zero and low speed range, I/F open-loop start-up strategy was used, and a smooth switching method according to decreasing q-axis reference current was also used to achieve the smooth switching from I/F open-loop control to double closed-loop vector control based on estimated speed. The simulation results indicate feasibility and effectiveness of the control strategy adopted.

关 键 词： 永磁同步电机 无位置传感器控制 开环启动 基于扩展反电动势