Sensitivity Analyses of Pulse Adjustment Control Technique of a Buck-Boost Converter Operating in Discontinuous Conduction Mode and Driving Constant Power Loads

Pulse adjustment, a fixed frequency control approach, is employed to control DC/DC converters loaded by constant power loads (CPLs) in this paper. Pulse adjustment achieves output voltage regulation by choosing high and low power pulses instead of using conventional pulse width modulation (PWM) scheme. It is simple, cost effective, and enjoys a fast dynamic response. A model to analyze buck-boost converters controlled by pulse adjustment approach in discontinuous conduction mode has been driven. Stability of the buck-boost converter driving constant power loads is analyzed using introduced model. Comprehensive sensitivity analyses of applying pulse adjustment method to control DC/DC converters loaded by CPLs are done in this paper. This paper gives design considerations to assess performance and stability robustness of the pulse adjustment method to control DC/DC converters loaded by CPLs