一种基于SPWM控制的逆变器设计与仿真

摘要

设计一种基于SPWM控制的逆变器,通过增加Boost升压电路,完成了逆变器母线电压的闭环控制,同时用SPWM的占空比对逆变器输出电压进行闭环,从而实现双闭环控制,增加了逆变器的功率和对不平衡负载情况的处理,并运用MATLAB对控制策略进行仿真验证,证明双闭环控制和增加Boost的逆变器设计能够提高逆变器对不平衡负载工况的处理能力,并提高惯性系统的快速响应性.%An inverter based on SPWM control was designed. The closed-loop control of its bus voltage was implemented by adding Boost converter, and the closed-loop control of its output voltage was implemented by using duty ratio of SPWM. So the double loop control was accomplished. The control strategy was verified by MATLAB. The results prove that the power of the inverter and the ability of handling the condition of unbalanced load are increased, and the fast response a-bility of inertial system is increased.