The study of the output voltage characteristics using delta-sigma modulation full bridge inverter with sampling interval non-uniformity

The inverter using PWM modulation method performs switching operation by comparing the reference signal and the carrier signal for each fixed period, thus large switching noise components on every integral multiple of the carrier frequency are generated. On the other hand, the inverter using delta-sigma modulation circuit, large noise components do not occur, and this is advantage for clearing noise regulations. About delta-sigma modulation circuit, it has been assumed that the control is performed at predetermined sampling intervals, in practice, it should be necessary to investigate the effect of the sampling interval variations. This paper investigates the impact of the inverter output voltage characteristics. In the case, there is non-uniform component to the sampling interval of full bridge inverter using delta-sigma modulation scheme.