公开(公告)号：US11342832B2

公开(公告)日：2022-05-24

申请号：US16936816

申请日：2020-07-23

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Yu Ujita ,  Masato Higuchi ,  Daisuke Yoshimi ,  Heiji Kaneda

IPC: H02M1/08 ,  H02P27/08 ,  H03K17/041 ,  H02M1/00

Abstract: A driving circuit for a semiconductor circuit which includes a pair of main terminals through which a main current is conducted and a control terminal to which a control voltage is applied to control a circulation state of the main current, includes: driving voltage switching circuitry that receives a control signal, instructs switching between driving voltages based on a change in the control signal, and outputs a driving voltage, among the driving voltages, that has been selected in the switching; low-speed control circuitry that instructs an increase-decrease change in the control voltage at a low speed; speed-increase control circuitry that executes a speed-increase control of increasing a speed of the increase-decrease change made by the low-speed control circuitry; and speed-increase switching circuitry that instructs switching between an execution and a non-execution of the speed-increase control, and instructs switching between levels of a speed-increase change caused by the speed-increase control.