单相400Hz逆变电源设计研究

Research into The Design of Single-phase 400 Hz Inverse Power Supply

研究了基于数字信号处理(DSP)的单相电压型脉宽调制(PWM)逆变电源的实现方案,给出了逆变电源的系统框图,利用状态空间平均法建立了逆变器数学模型,使用输出电压和滤波电感电流瞬时值作为双闭环反馈的控制策略,利用Simulink建立逆变电源的仿真模型。仿真结果表明,基于双环控制的逆变器动态响应快,鲁棒性强,能够产生较好的稳态输出电压及较低的总谐波畸变率。

This paper studies the realization scheme for the single-phase voltage pulse-width modu-lation （PWM ） inverse power supply based on digital signal processing （DSP） ,presents the system block diagram of inverse power supply ,sets up the mathematical model of inverter by means of state-space average method ,uses the output voltage and filtering inductance current instantaneous value as the control strategy of dual closed-loop feedback ,constructs the simulation model of in-verse power supply with Simulink .The simulation results show that the inverter controlled by dual closed-loop has advantages such as rapid dynamic response and strong robustness ,can generate bet-ter steady output voltage and less total harmonic distortion probability .