Dual-port output control of isolated DC/DC converter focusing on duty cycle and frequency of primary inverter

摘要

This paper proposes a new approach of an isolated DC/DC converter with dual-port outputs. The converter has two outputs, i.e., a 12-V port and a 48-V port for automotive applications. The dual-port output control can independently be achieved by using only a single primary inverter and a single high-frequency transformer. The duty cycle and the frequency of the inverter are used to control the two output voltages at the same time. The both port voltages are regulated by means of manipulating the duty cycle and the frequency, respectively. In the paper, a technique to achieve the dual-port output voltage control of the isolated DC/DC converter is described and their control characteristics are investigated to confirm validity of the proposed technique.