Patent ID: 9130480
Filing Date: 2015-09-08
Classification: H02M,H03K

Abstract:
1. A device for applying a high voltage using a pulse voltage that applies a high voltage having a steep leading edge to a capacitive load, comprising: a pulse transformer; a switching circuit that supplies a pulse wave having a steep leading edge to the capacitive load via the pulse transformer, the switching circuit having a plurality of switching elements that are turned ON/OFF by gate control; an oscillator circuit configured to generate a signal having a predetermined duty ratio of α%, a duty ratio of 0%, and at least an intermediate duty ratio of β(α>β>0) % that is between said duty ratio of α% and a duty ratio of 0%; and a short pulse generation circuit that generates a short pulse corresponding to an ON voltage only during a predetermined period corresponding to a leading edge of a rectangular pulse output from said oscillator circuit, wherein the switching elements are gate controlled based on said short pulse, an output from the switching circuit applies a voltage to the capacitive load via the pulse transformer, and a secondary side leakage inductance L the value of the secondary side leakage inductance L wherein C 1 : capacitance of the capacitive load.