Drive device

摘要

A drive device that drives a semiconductor switching device includes a capacitor, an output selection unit that selects whether or not to supply a charge of the capacitor to a conduction control terminal of the semiconductor switching device, and a charge consumption unit that supplies the charge of the capacitor to a portion other than the conduction control terminal, thereby consuming the charge of the capacitor.

主权项

1. A drive device that drives a semiconductor switching device, the drive device comprising:
a capacitor; an output selection unit that selects whether or not to supply a charge of the capacitor to a conduction control terminal of the semiconductor switching device; and a charge consumption unit that supplies the charge of the capacitor to a portion other than the conduction control terminal, thereby consuming the charge of the capacitor, wherein a supply period is a period in which the charge of the capacitor is supplied to the conduction control terminal of the semiconductor switching device by the output selection unit, wherein a non-supply period is a period in which the charge of the capacitor is not supplied to the conduction control terminal of the semiconductor switching device by the output selection unit, wherein the supply period and the non-supply period together form one cycle, wherein the output selection unit generates
a first drive cycle where the ratio of the supply period in the one cycle is a first ratio, anda second drive cycle where the ratio of the supply period in the one cycle is a second ratio which is larger than the first ratio, and wherein the amount of charge of the capacitor that is consumed by the charge consumption unit in the first drive cycle is larger than the amount of charge of the capacitor that is consumed by the charge consumption unit in the second drive cycle.