Abstract:
This thesis presents fractional order sliding mode control (FOSMC) for fractional
order single-ended primary-inductor converters (FOSEPIC). Integer order single
ended primary-inductor converter is not accurate, has low flexibility, defined uni formly and has low degrees of freedom. Like the conventional SMC methods, the
proposed FOSMC method employs a sliding surface function based upon the input
current error only. We achieve output voltage control indirectly by controlling the
input inductor current. This investigation of a fractional order SMC on a fractional
order SEPIC highlights the merits of the fractional order systems and fractional
order controllers. The input current reference is generated by a proportional integral (PI) regulator. The performance of the proposed FOSMC approach is
investigated by using a MATLAB/SIMULINK program. The buck/boost modes
for voltage regulation are studied by varying the following parameters: the input
voltage, orders of the system, order of the controller and load resistance. Simula tion results are presented for fractional order SEPIC converter of fractional orders
(0.25, 0.35, 0.52, and 0.65) and FOSMC of fractional order 0.35
