A further advantage of SEPIC converters is that almost any low-side regulator or controller can be configured as a SEPIC without the need of polarity inversion or level shift circuitry.

The controller was composed of optimum LQR, fuzzy controller and sliding mode adaptive regulator.

Though the analysis to PID regulator and fuzzy controller principle, fuzzily-PID controller combined with fuzzy control and PID regulator was applied to the control system of dewaxing.