Simplified Double-Integral Sliding-Mode Control of PWM DC-AC Converter with Constant Switching Frequency

In this paper, a simplified double-integral sliding-mode control method for pulse-width-modulated dc-ac buck conversion is introduced. The equation derived based on the equivalent method, in which control-oriented model developed using averaged dynamics of power converter continuous conduction mode. contrast with conventional schemes, complexity adding capacitor current sensor, variable ramp voltage, and other relevant components avoided. Furthermore, translated into simple electronic circuit minimal added components, reduces practical implementation cost. proposed rejects large disturbances, tracks reference signal, maintains constant switching frequency. Systematic design procedure, parameters selection, stability conditions are presented. methodology verified via simulating Simscape Electrical MATLAB. also compared scheme under load disturbances. results show that approach provides fast transient response robust tracking performance.