High-Speed Switching Method of MOSFET Using Auxiliary Circuit Shorting Load

— Application and Operation Characteristics of Chopper—

Abstract

This paper describes a high-speed switching method of MOSFETs applied to a chopper. By employing a set of auxiliary switch and diode in parallel with a load, the turn-off time can be reduced, which makes a high frequency drive possible. It was confirmed through experimental tests that an actual duty cycle of the main MOSFET was effectively improved by the proposed method, especially in a low-load range.