For Distributed High-voltage Isolation Auxiliary Power Current-mode Switching Converters Study

Among the device of power electronics is used in high-power install more and more widely, the issue of driving devices is becoming much more important now. The requirement that comes from High-voltage and isolated drive power supply becomes strict than before. Current type High-voltage and isolated drives power supply and switching mode converter of the secondary-side presented first time in this paper can satisfy these requirement.In the first chapter, the background of the subject and the significance on engineering and academic is introduced in this paper. The normal type of drive power supply with multiple isolated outputs including the dominance and weakness are introduced, focusing on the type based on current AC-bus.In the second chapter, the total structure of current-type drive power supply with multiple isolated outputs is introduced. For modifying the weakness of linear circuit, the concept of current type switching mode converter of the secondary-side is extracted first time.Based on the new requirement, the new high-frequency current source which is adapt to requirement of high-power is re-designed. The topology, mode of control and parameter selected are proved by emulation.Finally, current type switching mode converter is analyzed chiefly. In the fourth chapter, the circuit is modeled, then the dissipations both of linear and switching mode circuit are analyzed. Both of these distribute the basis of theory for experiment. In the fifth chapter, some problem and the scheme of problem-solving creating from the procedure of design are introduced. The results of simulate and experiment are analyzed in the end of the paper, and the conclusions received are conformity with the theory.