Research on High-Frequency Asymmetric Pulse Power Supply of Current Source

In order to meet the requirements of the surface treatment of material, in this paper the 50 kHz asymmetrical pulse power supply of current source is developed. The power supply adopts a two-stage construction. The front stage, in which current closed-loop control is employed, is high-frequency isolated DC/DC converter. The latter stage, on the contrary, is non-isolated asymmetric high-frequency pulse generator and uses open-loop control. After analyzing the topological principle, the important effect of the methods of series LC filter in the front stage is discussed. The 1kW experimental prototype is built and relevant experiments are carried out. Theoretical analysis and experimental results show that the circuit can meet the requirements of the surface treatment of material, and the circuit has the advantages of simple structure, easy control and low cost.