An optimal charging technology research for intelligent wheelchair

Intelligent wheelchair charging technology put forward a very high request to the stability of the DC bus voltage. The paper introduces principle of the three-phase PWM rectifier based on voltage and current double closed loop control structure, it does not affect following performance of the system, the current inner loop adds to feed-forward compensation. According to the power balance between input and output relations, the voltage outer loop adds to load current feedback. Q-axis current and d-axis current are individual controlled, and solve parameter of control system with Genetic Algorithm(GA), and give the voltage regulator and current regulator design method. Finally, the SVPWM current control method by simulation results show that the process of charging system stability has improved significantly.