Abstract
In this study, we propose a simple pulse-width modulator based on integral sliding mode controller (PWM-SISMC) to deal with the steady state error (SSE) of a boost converter. The PWM-DISMC is used for the first time to compensate for the SSE of a proton exchange membrane fuel cell (PEM-FC). The PWM-DISMC tracks the reference output of the FC system composed of a 7 kW FC supplying a resistive variable load (24 Ω to 96 Ω) and a DC bus voltage (48 V) using a boost converter. A control signal is then generated and used to adjust the pulse width of the PWM output signal that drives the boost converter switch. The PWM-DISMC is compared to the conventional PWM-SISM using the SimPowerSystems models implemented by MATLAB/Simulink. simulation results show that the proposed PWM-DISMC has better performances, regarding the steady state error of the boost converter, than the performances of the PWM-SISM.
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