Input device of inverter pulse width modulation controller to remove narrow pulse width

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing a narrow pulse width of a gate signal generated when a reference voltage approaches a maximum / minimum value of a carrier signal in pulse width modulation control for controlling an inverter.;The present invention provides a comparator (1) for comparing a reference voltage with a plurality of boundary values, a logic gate part (2) for determining the position of the reference voltage compared in the comparator, and the logic gate part (2). It is composed of a multiplexer that selects the reference voltage (Vref *) according to the output of the output and outputs it to the pulse width modulation controller (PWM). By removing the narrow pulse width and inputting it to the PWM controller, the device can be protected as well as the reference. At the maximum and minimum values of the carrier signal close to the voltage, switching is not performed to reduce the loss of the switching element.