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

Claim 15:
16. A gate driving apparatus comprising:
a gate driving unit for driving a gate of a switching device, the switching device being connected in series with an opposite switching device that has a freewheeling diode connected thereto in antiparallel;
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 is 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; and
a fourth detection unit for detecting elapse of a second reference period, which is from a second reference timing after a turn-on signal is input into the switching device to that after a timing when a current flowing in the freewheeling diode becomes zero, and supplying a signal to the switching unit, wherein
the at least a part of the period includes the timing when the current flowing in the freewheeling diode becomes zero.