DSP controlled soft switched push-pull ZCS_QRC Fed DC servo motor for aerospace applications

Abstract

This paper presents the design and implementation of a push-pull full-wave ZCS-QRC feeding a DC servomotor. The speed of the DC servomotor can be controlled by varying the average value of the armature voltage. The same is achieved using push-pull ZCS-QRC by varying the duty cycle of the switching pulses. The converter employs a zero-current switched full-wave push-pull structure. It allows high power density and full exploitation of the transformer core. An analytical study on zero-current switched full-wave push-pull DC-DC converter is presented in detail. Open loop and closed loop control of DC servomotor using DSP TMS320LF2407 controller is also achieved. Experimental results of both open loop and closed loop operations are also presented.