异步电机无速度传感器带速重投策略

Speed Sensorless Control and Restarting at Unknown Speed of Induction Motor

在异步电机转速自适应全阶观测器无速度传感器控制方法的基础上,提出了一种基于波波夫稳定性理论的带速重投策略。该策略能够反映出转速估计值与实际值之间的误差关系,并通过自中心向两侧检索的方法使得转速估计值快速地向实际值收敛。采用了一种预励磁方案来达到减小带速重投过程中电流冲击的目的。仿真结果证明了所提策略的准确性和有效性。

A full-order observer with speed self-adapting rule of induction motor was presented. A strategy of restarting at unknown speed based on Popov stability theory was proposed. In the proposed strategy,the error between estimated speed and real speed was reflected. In order to make the estimated speed follow real speed rapidly,a method searching from middle of max motor speed to two sides was used. In addition,a method of pre-excitation was used to decrease current impact during restart the motor at unknown speed. The correctness and effectiveness of the proposed strategy were proved by simulation results.