Digitalized Pulse Width Modulator for Inverter Circuit

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digitalized pulse width modulator for use in an inverter circuit for motor control. In particular, a pulse width modulated signal that is digitalized and outputted by an analog processed pulse width modulator is linear in all areas and has noise. The present invention relates to a digitized pulse width modulator used in a strong inverter circuit.;In the conventional pulse width modulation device, the frequency of the pulse width modulation signal output from the buffer part is not constant because the reference signal output from the reference signal generator does not form a sawtooth wave because the capacitance of the capacitor is easily changed according to temperature. Since the D / A converter is vulnerable to noise, the reliability of the product is deteriorated.;Accordingly, the present invention is a digitalized pulse width modulation device in which a pulse width modulation signal output by digitalizing a pulse width modulation device that has been analogized in order to solve the problem is used in an inverter circuit having linearity in all areas and resisting noise.