新颖的基于电压空间矢量三相双向整流器的研究

基于传统SVPWM调制的三相整流器能够获得快速的动态响应,但实现复杂,需要高速微处理器.本文提出了一种新颖的简单SVPWM调制方法,在理论分析的基础上得出了整流器工作在整流状态和逆变状态下实现SVPWM调制的统一占空比计算公式.该方法具有传统SVPWM快速动态响应的优点,且实现简单;同时整流工作状态与逆变工作状态双向可逆,能实现整流器输入功率因数接近于1.计算机仿真结果表明了本文所提出的方法具有可行性.

Study of a Novel Three-Phase Bipolar Mode Rectifier Based on Voltage Space-Vector

The three-phase rectifier with the conventional voltage space-vector modulation method has fast dynamic response, but it is complex to be implemented and need highly speed microprocessor. A novel simplified space-vector modulation method is proposed in this paper. It is different from the conventional space-vector, the regions is divided through the three phase phase-voltage cross zero of the input voltages. Based on analyzing, the uniform duty ratio formulas are given under the rectifying and inverting operation. The space-vector modulation is utilized by the uniform duty ratio formulas. The proposed method has the advantages of conventional space-vector modulation method with fast dynamic response. In addition, it is simple to be implemented. With the proposed method, the rectifier can either work under rectifying operation or under inverting operation and the input power factor can be corrected to about unity. Computer simulation results show that the proposed method is valid.