【摘要】 为了解决在基于滑模观测器的无位置传感器控制下,同步磁阻电动机无法实现自起动及低速运行的问题,本文对I-f流频法自起动控制进行了研究。通过利用电动机的"转矩-功角自平衡"特性,实现了电动机的单电流环闭环起动以及由流频法控制向基于滑模观测器的无位置传感器控制的平稳切换。同时分析了电流下降率对切换过程的影响,通过采用变斜率的方法,保证了切换过程的平稳性和快速性。仿真结果表明了该方法对于解决上述存在的问题是有效可行的。更多还原

【Abstract】 In order to solve the problem that the synchronous reluctance motor can not achieve self-starting and low speed operation under sensorless control based on sliding mode observer, the I-f method based self-staring control is studied in this paper. The single current closed-loop starting of the motor and the smooth switching from I-f control to sensorless control based on sliding mode observer are realized by using the torque-power angle self balancing characteristic of the motor. At the same time, the influence of the current drop rate on the switching process is analyzed. By using the variable slope method, the stability and rapidity of the switching process are guaranteed. Simulation results show that this method is effective and feasible for solving the above problems.更多还原