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

Claim 13:
14. 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; and
a first detection unit for detecting elapse of a first reference period, which is from first reference timing after a turn-on signal is input into the switching device to after the timing when the current starts to flow in the switching device, and for supplying a signal to the switching unit, wherein
the first reference timing is after an input timing of a turn-on signal to the switching device;
the switching device is connected in series with an opposite switching device that is connected in antiparallel to a freewheeling diode; and
the gate driving apparatus further comprises:
a first acquisition unit for acquiring at least one of a parameter indicating a gate voltage of the switching device, a parameter showing a device voltage of the switching device, a parameter showing a current flowing in the switching device, and a parameter showing a current flowing in the freewheeling diode; and
a second detection unit for detecting the first reference timing, and supplying a signal to the first detection unit based on a parameter acquired by the first acquisition unit.