电压电流混合模型的感应电机无速度传感器矢量控制

分别采用电压模型和电流模型的感应电机直接磁场定向控制在低速和高速时估计的转子磁链精度不高．在这基础上研究电压电流混合模型的闭环转子磁链观测器，使其在低速时采用电流模型，在高速时采用电压模型，两者能平滑过渡．根据磁链观测器结构，采用开环转速估计器，并做相应的抗噪声处理，使它结构简单，能满足动态和稳态要求．根据控制原理，采用高性能DSP实现，试验结果验证了在较宽的速度范围内能达到令人满意的稳态性能．

A Sensorless Vector Control of Induction Motor Based on Voltage-Current Model

The direct field orientation of induction machines based on Voltage Model and Current Model produce unsatisfying performances at low speed and high speed separately.In this paper,a rotor flux observer based on Voltage-Current Model is introduced,which can work in Current Model at low speed and Voltage Model at high speed.Two models can be switched smoothly.Depending on flux ob- server,open-loop speed estimator using anti-noise measures can meet with the dynamic and steady- state demand.The experiment is realized by DSP programming.The final waveforms show that the mix model can satisfy steady performances at a wide speed range.