Novel motor stator flux observer based on PLL

作者：Gao Jin Wen^*; Wen Xu Hui; Chen Jing Wei; Zhao Feng

来源：Proceedings of the CSEE, 2007, 27(18): 41-47.

• Flux linkage
• Flux observer
• Parameter identifier
• Stator flux
• Torque estimator

It is necessary to estimate the stator flux linkage for torque estimation in the AC motor. Most stator flux observer are based on voltage-flux model to avoid the saturation of the induction parameters. Classic flux observer integrates the voltage of the stator directly to get the flux. But the integrator is easily to saturate with the input DC error. High pass filter can avoid the saturation but will cause delay on phase. A new flux observer based on phase lock loop (PLL) is present which can eliminate the delay of the phase and the saturation. But the performance of this observer is poor at low speed. This paper presents a novel stator flux observer based on PLL which improve the performance at low speed even at zero speed. Simulation and experiment result validate the stability.

• 出版日期2007