Patent ID: 11870425
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 14:
15. The gate drive device according to claim 14, wherein
the change rate control circuit is configured to
set the target change rate to a value, which is smaller than an original value, immediately after a start of operation of the gate drive device and immediately after an output state, in which the change permission signal is output, is switched to a stopped state, in which output of the change permission signal is stopped,
thereafter start increasing the target change rate to the original value under a condition where a peak value of the element voltage during the change period is equal to or smaller than a preset tolerance, and
output the change permission signal in response to the difference between the change rate and the target change rate that is stabilized at a value smaller than the error tolerance, in a state where the target change rate becomes the original value.