A simple configuration reducing noise level three-phase sinewave inverter employing delta-sigma modulation scheme

For the purpose of reducing noise level, this paper proposes a simple configuration space vector controlled three-phase sinewave inverter employing delta-sigma modulation scheme. To determine the output voltage vector of the inverter, the proposed scheme combines two channel delta-sigma modulators effectively. Comparing to the conventional PWM inverter, it is clarified that the proposed inverter can reduce noise level and suppress load current distortion.