Research on the Control Strategies of Single-Stage Flyback Inverter

Compared with the traditional two-stage inverter, the single-stage isolated inverter is superior in the use of medium and small power field. Its structure is greatly simplified as well as the circuit components are reduced a lot. A novel single stage isolated inverter - flyback inverter is introduced in this paper. Its three control strategies including difference control, unilateral control and synchronous rectification control are analyzed in detailed respectively. As the cycling of the energy exists when using the difference control strategy, it´ll cause low converter efficiency. So the improved control strategy - unilateral control is proposed in this paper, the experimental results verify the feasibility of this control method. And in order to improve the converter efficiency a lot, the synchronous rectification control is introduced in this paper. Also the experimental results verify its feasibility. And the efficiency of the 100 VA experimental prototype was improved to 85.8% in the end