EXPERIMENTAL RESULTS FOR THE SMALL-SIGNAL STUDY OF THE PWM BOOST DC-DC CONVERTER WITH AN INTEGRAL-LEAD CONTROLLER

An experimental verification of previously derived small-signal low-fr equency open- and closed-loop characteristics and step responses of a voltage-mode-controlled pulse-width-modulated (PWM) boost DC-DC conver ter is presented. The Bode plots of the voltage transfer function of t he control circuit, the converter and the PWM modulator, the open-loop control-to-output and input-to-output transfer functions, the loop ga in, and the closed-loop control-to-output and input-to-output transfer functions are measured. The step responses to the changes in the inpu t voltage, the duty cycle, and the reference voltage are measured. The theoretical results were in good agreement with the measured results. The small-signal model of the converter is experimentally verified.