张兰红,郑慧丽.异步电机DTC系统中的相电流检测研究[J].电测与仪表,2014,51(21):. ZHANG Lan-hong,ZHENG Hui-li.Current detection research in asynchronous motor DTC system[J].Electrical Measurement & Instrumentation,2014,51(21):.
异步电机DTC系统中的相电流检测研究
Current detection research in asynchronous motor DTC system
Phase current detection is the key factor of the Induction Motor Direct Torque Control System, the paper designs a more simple, practical and high accuracy phase current detection circuit using in asynchronous motor direct torque control system. Using new current sensor chip ACS712, the invert bridge arm sampling mode, accurate detection of current. Error calculation, using MATLAB fitting and giving the experiment results. With TMS320F2812 as the master controller to verify the correctness of the detection method. The results show that the circuit has high detection accuracy and linearity and can be widely applied in AC speed regulation.
