A Novel Method of Auxiliary Power Supply Used in Wide-Range High Voltage Input DC-DC Converter
- 1 Hubei Collaborative Innovation Center for High-Efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan, China
- 2 Hubei Collaborative Innovation Center for High-Efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan, China
- 3 Hubei Collaborative Innovation Center for High-Efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan, China
Abstract
In high voltage input DC-DC converter, auxiliary winding of isolation transformer is usually used to supply power for control circuit. Due to the wide-range of input voltage, the variable output voltage of auxiliary winding will cause a series of problems, such as variable drive pulse amplitude, increased driver switching devices loss and drive transformer core saturation. This paper analyzes the influence of variable output voltage of auxiliary winding in detail. A novel method is proposed to solve the problem of large variation range of auxiliary winding output voltage, which is adding a buck converter between the auxiliary winding and the control circuit. A dual switch forward convert has been designed with 300 V - 800 V input and 24 V/5 A output. The results show that this method is effective by comparing the different results of using buck converter or not.
- Gu, X.M. (2005) Study on a Wide Range Dual-Forward Forward DC / DC Converter. Journal of China Electromechanical Engi-neering, 25, 44-48.
- Yu, P.(2011)Study on Wide Range Input Two-Stage DC / DC converter. Chongqing University.
- Hu, L.D., Zhao, Z.H., Sun, C., et al. (2015) Study on Driving of High-Voltage Input Double-Tube Flyback Assisted Power Supply. Journal of Electrotechnical Society，30,161-170. https://doi.org/10.1149/2.0451504jes
- Chen, D.P., Sun, C., Ai, S., etc. (2014) A Wide Range of Dual-Tube Flyback DC / DC Auxiliary Power Supply Design. Power Technology, 11, 2125-2129.
- Hu, L., Sun, C., Zhao, Z.H., et al. (2015) Design of DC-DC Auxiliary Power Supply with High Voltage and Wide Range Input Low Voltage Output. Journal of Electrical Engineering, 2, 103-114.