A New Discovery and Analysis on Chaos and Bifurcation in DC Motor Drive System with Full-bridge Converter

In this paper, some new phenomena have been investigated in the DC motor drive system with PWM full-bridge converter. In the remarkably simple system, rich and interesting chaotic and bifurcation behaviors have been found at certain system parameters and operation conditions. In order to determine the area coverage of parameter of system fallen into chaos or bifurcation, an improved small-data algorithm is presented for system testes. The simulation results show that different bifurcation diagrams can be obtained at different system parameter conditions. Furthermore, explicit and implicit analysis has been done to explore the occurrence of chaos