Sensorless Vector Control System For Induction Motor In EV

Under some special conditions such as for stability and low cost, sensorlesscontrol algorithms are preferred when we put IM drive system in EV.Theories about sensorless IM control system are introduced in this thesis. Andseveral sensorless control algorithms are summarized and compared. I put moreemphases on a vector control system designed especially for IM in EV.First of all, the situation of EV development was introduced and the reason whyIM are generally used in EV was given. Special characters of IM control system in EVare listed. Then a rotor field orientation vector control system based on flux estimatedby voltage model is proposed to meet the requirements. A novel integration algorithmis introduced to solve the problems caused by a pure integration. I put emphases onthe modules designing and offer the results of MATLAB/Simulink and propose aspeed estimator to offer the speed information. In the last chapter, a practical systembased on TMS320LF2407 DSP is introduced...