FUZZY BASED SOFT SWITCHING DC-DC CONVERTERWITH FULL ZVS RANGE FOR SERVO MOTOR DRIVE

Abstract — This paper presents soft switching PWM DC-DC converters using power MOSFETs. The attention is focused mainly on the full-bridge converters suitable for servo drive applications. The proposed converter is composed of two symmetric half-bridge inverters that are placed in parallel on the primary side which are triggered by gate pulses which is produced by the fuzzy logic controller according to the output of the servo motor. At the rectifier stage, two full-bridge rectifiers sharing two low-current-rating diodes are employed. No problems related to duty-cycle loss, no circulating current, and a significantly reduced output filter. In this paper, the circuit configuration, operation principle, and simulation work and simulation results of th