SWITCH DEVICE, POWER CONVERSION DEVICE, MOTOR DRIVE DEVICE, FAN, COMPRESSOR, AIR CONDITIONER, REFRIGERATOR, AND FREEZER

摘要

An object of the present invention is to provide a switch device in a power conversion device that is located between a power supply and a load, wherein the power conversion device includes a shunt resistance and a switching element and is capable of executing stable control, and the switch device includes a switching element 21a that includes a gate terminal, a gate drive circuit 51a that applies a drive voltage V cc to a gate terminal of the switching element 21a, and a control unit 8 that generates a drive signal to be supplied to the gate drive circuit 51a, and wherein a value obtained by subtracting a threshold voltage V th of the switching element 21a from the drive voltage V cc to be applied to the gate terminal of the switching element 21a is greater than a product of a resistance value R sh +R dc from an emitter of the switching element 21a to a negative electrode of the gate drive circuit 51a and a maximum current value I peak that flows through the switching element 21a.