CHEN Yuhai 1 ,ZHANG Baiqing 2 ,LIU Beiying 1 ,HU Zhenghuan 1
(1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083;
2. School of Mechanical & Electronic Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001）
Abstract: 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.
Keywords: Induction motor, mathematic mode, sensorless control, rotor position tracking