中文摘要：

提出了一种基于滑模观测器的永磁同步电机（PMSM）无位置传感器快速启动控制策略。启动阶段采用电流闭环．速度开环中的（I-F）控制，速度上升到一定水平后切换成速度．电流双闭环控制。状态切换过程中，以滑模观测器估测的转子位置与给定坐标系位置的相位差为参考变量，对电机电流采用变斜率的方法进行控制，使相位差趋于零．最终实现控制策略的快速平滑切换。对所提控制策略进行实验验证，证明了其有效性。

英文摘要：

A fast start-up strategy based on sliding mode observer sensorless of permanent magnet synchronous motor（PMSM） is proposed.l-F strategy of current closed-loop-velocity open-loop is adopted in start-up state ,the motorwould switch to a strategy of double-closed-loops of speed and current after the speed reached at a certain level.Inorder to make sure that the control strategy switched quickly and smoothly,a reference variable is made using thephase difference between the rotor that the sliding mode observer estimated and the given coordinate.The motor cur-rent is controlled with a method of variable slope until the phase difference tended to zero.Experiments are carried toverify the proposed control strategy and the results show the effectiveness of the control strategy.