VIENNA整流器单周控制输出电压波动机理分析及改进

The Analysis and Improve of One-Cycle Control of VIENNA Rectifier

本文在深入分析已有VIENNA整流器使用单调控制时,输出总电压波动及输出电压不平衡的原因的基础上,提出了一种新的控制方法,将单周控制对功率因数校正电路解耦的思想与滞环电流控制相结合。与原有方法相比,对电感等器件要求低,控制电路比较简中,并且能够很好地实现输出电压的平衡,可靠地对电路进行控制,解决单周控制在某些时候输出电压不稳定的情况。计算及仿真结果均证明它可以较好地改善电路的性能。

This paper. on the basis of an in depth analysis of the existing theories of the VIENNA rectifier. makes a careful study of the practical VIENNA rectifier working state and carry out a new control method. Compared with traditional one-cycle and hysteresis control method, the circuit is much simple and the requirement of the elements such as inductance is much lower. it can realize the balance of the output voltage. The new method can perform the rectifier very much without complicating the control circuit. In the, end, this paper presents some computation and simulation results. all of which show that these two improvements are useful.