摘要
提出了一种表面式永磁同步电机无传感器矢量控制自适应滑模观测器.该观测器可以准确估计d、q轴电流,避免了由于转子位置估计带来的时延影响.在保证反电势、电流矢量估计值与各自实际值具有相同延迟角前提下,将估计坐标系下的d、q轴电流反馈给PI控制器产生正确的电压参考信号.采用未经校正的估计转子位置信号完成观测器内的坐标变换,同时采用具有相同时间常数的低通滤波器对估计反电势和电流矢量进行滤波,在此基础上利用估计反电势及其微分实现转子速度与位置估算.仿真结果证实了控制方法的可行性和正确性.
An adaptive sliding-mode observer for sensorless vector control of surface permanent magnet synchronous motor （SPMSM） is presented. The observer shows that the time-delay, in rotor position estimation, does not have influence on the vector control when the d-and q-axis current components are accurately estimated. The PI controllers, fed by the actual d-and q-axis current errors, generate the correct voltage references in the estimated rotor reference frame. The coordinate transformation needs the estimated rotor position with no correction. To obtain accurate estimates of the d-and q-axis current components, it is requied that the estimated emf and current space vectors have the same delay with the actual ones. An adaptive sliding-mode observer, with low-pass filter, is employed to estimate the emf space vector, and a similar low-pass filter to dday the current space vector. The rotor speed and position are obtained from the estimated emf space vector and its derivative. Simulation results prove the effectiveness and correction of the prooposed scheme.
出处
《沈阳工业大学学报》
EI
CAS
2006年第1期45-48,共4页
Journal of Shenyang University of Technology
基金
国家自然科学基金资助项目(50375102)
辽宁省高等学校优秀人才基金资助项目(RC-04-14)
辽宁省自然科学基金资助项目(20042021)
辽宁省教育厅高等学校科学研究基金资助项目(202063290)
关键词
自适应
滑模观测器
永磁同步电机
无传感器
矢量控制
adaptive
sliding-mode observer
permanent magnet synchronous motor
sensorless
vector control
