PWM SIGNAL OUTPUT DEVICE AND PWM SIGNAL PROCESSING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a PWM signal output device enabling the correct evaluation of a PWM signal on the reception side, if a distortion occurs in a carrier wave used for actual PWM control.SOLUTION: A duty converter unit 4 generates Ach and Bch PWM signals on the basis of a voltage signal generated by diodes 31a, 31b. A correction signal and carrier wave generation unit 5 generate identification signals respectively proper to the Ach and Bch PWM signals, and a correction signal (and an inverse correction signal) including information which indicates each carrier wave period of the PWM signals. Changeover switches 51, 52 and a control unit 6 synthesize the correction signals together with the plurality of identification signals and the PWM signals in a time series, to output a synthetic PWM signal.SELECTED DRAWING: Figure 1