内置式永磁同步电机无传感器最小损耗控制

Interior Sensorless Minimum Loss Control for Permanent Magnet Synchronous Motors

针对内置式永磁同步电动机(IPMSM),提出了一种内置式永磁同步电机无传感器最小损耗控制策略。由于传统转子磁链观测器不易得到初始转子通量,且存在直流偏置问题,通过梯度下降法构造改进非线性观测器,提高转子位置辨识精度。为降低控制系统的能耗,通过虚拟信号注入法构造虚拟功率电流补偿控制器,在线搜索最优调节电流。通过系统仿真结果表明,该策略能快速观测转子位置,相较于i d=0控制与VCCC,在相同工况下,能耗分别降低了4%~24.21%和1.33%~9.15%,有效提高控制系统的能耗优化性能。

A sensorless minimum loss control strategy is proposed for interior permanent magnet synchronous motor(IPMSM).Since the initial rotor flux is not easily to be obtained by the traditional rotor magnetic chain observer and there is a DC bias problem,an improved nonlinear observer is constructed by the gradient descent method to improve the rotor position identification accuracy.In order to reduce the energy consumption of the control system,a virtual power current compensation controller is constructed by the virtual signal injection method to search the optimal regulation current online.The system simulation results show that this strategy can observe the rotor position quickly,and compared with i d=0 control and VCCC,the energy consumption is reduced by 4%~24.21%and 1.33%~9.15%,respectively,under the same working condition,which effectively improves the performance of the control system in terms of energy consumption optimization.