A Method for Stabilizing the Output Voltage of a Two-Phase Nonlinear Power Device with Series Reactors

Abstract

This paper deals with a method for controlling instability in a two-phase nonlinear power device. The instability consists of nonperiodic oscillations such as quasi-periodic or chaotic oscillations and interruptions in the operation of the device. The authors previously reported that the instability depends on circuit factors, namely, the sharpness of the saturation curves of the reactor used in the device, and the resistances of the supply side.
This paper shows that a very effective way of controlling the instability is to introduce inductances into the primary side of the device. The inductances suppress not only the nonperiodic oscillations, but also the interruption of the operation. The analysis is supported by experiments.