基于反相高频注入的双三相异步电机磁场位置检测方法

Field Position Detection Method Base on High-Frequency Signal Injection for Dual-Three Phase Induction Machine

高频注入法能够实现异步电机在低速下的无速度传感器控制,其控制性能很大程度取决于利用电机饱和凸极效应检测磁场位置的准确性。本文分析了双三相异步电机在反相高频注入下磁场位置检测的原理,利用电磁场数值仿真和实验分析了在不同的励磁电流、电磁转矩下的饱和凸极效应,并与三相异步电机做了对比。结果表明,双三相电机的饱和凸极效应更加明显,能更准确地检测到磁场位置。最后通过实验证明了基于反相高频注入的双三相异步电机磁场位置检测方法在低速和零速下的有效性。

The high frequency injection sensorless control method for induction machine can be used at very low speed, and the control performance is basically depended on the accuracy of magnetic field position de- tection based on the saturation saliency of induction machine. This paper analyzed the principle of the mag- netic field position detection by antiphase high frequency injection for dual-three phase induction machine, the different performance of saturation saliency at different excitation currents and torques, and compared with three-phase induction machine. The result shows that the saturation saliency effect of dual-three-phase machine is much more obvious than three-phase machine, and the magnetic field position detection result is more accurate. And experiments results verified the effectiveness of field position detection method by high frequency injection for dual-three-phase induction machine at low and zero speed.