Electric Vehicle Motor Drive Vector Control System Realized by Dual CPU

A vector control system for electric vehicle (EV) induction motor drive system is designed and developed. Its hardware system based on dual CPU is implemented. The fundamental mathematics equations of induction motor in the general synchronously rotating reference frame used for vector control are achieved by coordinate transformation. Rotor flux equation and torque equation are respectively deduced. The rotor flux field-oriented vector control method is implemented basing on these mathematical models in system software. The software program flow is presented.The simulation and test results show that the control system has better dynamic performance,widely variable speed range and constant torque sector.