A new simple control method of three phase /level/switch rectifiers

This paper is based on an in-depth analysis of the existing theories of the three Phase/level/switch WENNA rectifier. In this paper more attention was paid on the practical VIENNA rectifier´s working state and carried out a new control method. Compared with traditional one-cycle control method and hysteresis control method, this circuit is simpler and the requirement of the elements is lower. For example the inductance is smaller, it can keep the balance of the output voltage across the two output capacitances, solve the problem that one-cycle control method can not keep output voltage steady sometimes. The new method is simple and the performance is well. In the end some computation and simulation results are showed. It is obviously that the two improvements are useful.