Implementation of optimal output characteristic for a telecom power supply: Fuzzy-logic approach

In this article, the fuzzy controllers for DC/DC converters are applied and investigated for both voltage and current loops. Fuzzy PID-like controller for voltage-loop is implemented to achieve the robust output voltage in spite of load disturbances. Fuzzy PI-like controller for current-loop is implemented to ensure that the overload protection reaches the optimal output characteristic of a Telecom power system. Implementation of fuzzy controllers is relatively simple, and can guarantee a small-signal response as fast and stable as that of conventional controllers and an improved large-signal response. A design example is given to show the approach's potentialities.