A Design of Cascaded Multilevel Inverter Snubber Circuit
The high frequency induction heating power supply has received increasing attention from researchers, multilevel converter is a high voltage large power application areas of research focus and core, it solves the problem of the multilevel inverter output voltage waveform adjustment, avoids the problem of two times reversing that the load voltage in the commutation during the dead period occurred. An effective way to improve efficiency is to keep the power device of low voltage stress and less switching loss. A passive lossless snubber circuit is designed for inhibiting the reverse recovery current of diode and improving the turn-on condition of powers switch. The operation process of snubber circuit is analyzed and the parameter design method is given. The results of simulation have verified the validity of design methods and the conclusions given by theoretically analyzing in this paper.
Liangchi Zhang, Chunliang Zhang, Jeng-Haur Horng and Zichen Chen
Q. H. Zhou and Q. F. Liu, "A Design of Cascaded Multilevel Inverter Snubber Circuit", Advanced Materials Research, Vols. 591-593, pp. 2642-2646, 2012