PWM signal generator and inverter equipped with this PWM signal generator

摘要

PWM signal generator (41) or (42), comprising: a first pulse waveform generator for generating a first pulse waveform corresponding to a period of a first pulse signal; a second pulse waveform generator for generating a second pulse waveform when it elapses in a predetermined delay time after the start of generation of the first pulse waveform, the second pulse waveform corresponding to a period of a second pulse signal; and PWM signal generating means for generating a PWM signal based on a composite pulse waveform in which all of the first pulse waveform generated by the first pulse waveform generator is combined with the entire second. pulse waveform generated by the second pulse waveform generator; so that the first pulse waveform generator is configured to generate a following first pulse waveform upon completion of the composite pulse waveform.