Adaptive Passivity Based Control of DC-DC Power Electronic Converters

Application of power electronic converters and their controls play a vital role in modern industry. Advanced nonlinear controls with adaptation are required to control these converters when all or some of the system parameters are unknown or uncertain. Design of a passivity based nonlinear adaptive controller to control the output voltage of power electronic converter is proposed in this paper. Unlike most of the other adaptive controllers which require the input voltage information of the converter, the proposed controller require neither input voltage information nor output load resistance. Taking the duty cycle as the control input of the boost converter, the adaptive passivity based controller is designed to regulate the output voltage of the converter to a desired value. However, the proposed approach can be easily extended to control any other DC-DC converter without loss of generality. Simulation and experimental verifications were carried out to analyze the performance and the effectiveness of the proposed controller.