An Advanced Simple Configuration Delta-Sigma Modulation Three-Phase Inverter Implementing Space Voltage Vector Approach

To miniaturize and enhance the performance of a variety type of switching mode inverters and converters, researchers have developed with great efforts so far. In these switching node converters, pulse width modulation (PWM) technique is commonly made use of voltage regulation. In case of using PWM processing scheme, noise peaks appear at the whole number of carrier frequency. And this causes bad influence to the electronic information, telecommunication, consumer and medical equipments near the converter. On the contrary, in case of applying a delta-sigma modulation scheme to switching power converters, no noise peaks appear in the high frequency bands. In this paper, an advanced three-phase delta-sigma modulation inverter introducing space voltage vector modulation scheme is presented and evaluated. Though the proposed modulation inverter consists of simple configuration, the proposed scheme can suppress noise level effectively with low switching operation number.