【作者】 王军； 徐龙祥；

【机构】 南京航空航天大学自动化学院；

【摘要】 本文主要介绍了一种无传感器磁轴承转子位置自检测的方法,该方法不需要专用的位移传感器。由于线圈的电感是转子位移的函数,故其两端的电压也为转子位移的函数,在磁轴承系统的线性功率放大器的输入端注入一高频信号作为转子位置的测试信号,将线圈端电压经过谐振电路来提取含有位置信号的高频电压信号,再将电压信号进行精密半波整流后得到脉动的直流信号,最后通过低通滤波器得到平滑的转子位移直流信号,由PID控制器转换为转子位移的控制信号,仿真试验证明了该方法的可行性。更多还原

【Abstract】 A method of self-sensing rotor position of magnetic bearing is introduced in this paper. By this way , no special displacement sensors are used. Because the inductance of winding is the function of the rotor displacement, the voltage output is the function of the displacement too. A high frequency signal as the testing signal of the displacement was injected into the input of linear power amplifier. The high frequency voltage signal containing the information of displacement is output from resonance circuit in which the terminal potential of winding is input ,then transformed to the DC voltage signal proportional to the rotor displacement by half-wave rectification circuit and low pass circuit. This DC signal is put into a PID controller to get the control signal of the rotor displacement. Finally the emulational experiment proves the feasibility of this method.更多还原