陶瓷机械变频控制无传感器技术转子位置跟踪研究

STUDY ON SENSORLESS ROTOR POSITION DETECTION OF VARIABLE-FREQUENCY CONTROL FOR CERAMIC MACHINERY

针对传统异步电机无传感器控制技术在低速时信噪比低、对电机参数敏感,利用逆变器馈电时的电压脉冲信号作为激励信号,电流的瞬态响应作为可反映转子位置信息的寄生效应检测信号,实现了异步电机凸极效应相关的转子位置信息提取。对逆变器的非线性行为所带来的影响也做了探讨。仿真和实验结果验证了所提出方法的正确性和有效性。

Due to the low signal to noise ratio and parameter uncertainties at low speeds and frequencies the sensorless control system tends to drift away, voltage test pulse generated by inverter is injected into the phase windings, and the transient current changes are evaluated to obtain the parasitic effects due to rotor position. The inverter＇s nonlinear behavior is also studied. The feasibility and validity is verified through the simulated and experimental results.