Patent ID: 11894837
Assignee: FUJI ELECTRIC CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A gate driving apparatus comprising:
a gate driving unit for driving a gate of a switching device;
a switching unit for switching a gate current of the switching device during, within a turn-on period of the switching device, at least a part of a period, which starts after timing when a current starts to flow in the switching device, to a smaller current when compared to the gate current before the at least a part of the period;
the switching device is connected in series with an opposite switching device that has a freewheeling diode connected thereto in antiparallel;
the at least a part of the period includes timing when a current flowing in the freewheeling diode becomes zero;
a second acquisition unit for acquiring at least one of a parameter showing a current flowing in the freewheeling diode and a parameter showing a current flowing in the switching device; and
a third detection unit for detecting that a current flowing in the freewheeling diode has become zero and supplying a signal to the switching unit based on a parameter acquired by the second acquisition unit.