Publisher : The Korean Institute of Power Electronics
DOI : 10.6113/JPE.2016.16.2.498
Title & Authors
PWM Control Techniques for Single-Phase Multilevel Inverter Based Controlled DC Cells Sayed, Mahmoud A.; Ahmed, Mahrous; Elsheikh, Maha G.; Orabi, Mohamed;
This paper presents a single-phase five-level inverter controlled by two novel pulse width modulation (PWM) switching techniques. The proposed PWM techniques are designed based on minimum switching power loss and minimum total harmonic distortion (THD). In a single-phase five-level inverter employing six switches, the first proposed PWM technique requires four switches to operate at switching frequency and two other switches to operate at line frequency. The second proposed PWM technique requires only two switches to operate at switching frequency and the rest of the switches to operate at line frequency. Compared with conventional PWM techniques for single-phase five-level inverters, the proposed PWM techniques offer high efficiency and low harmonic components in the output voltage. The validity of the proposed PWM switching techniques in controlling single-phase five-level inverters to regulate load voltage is verified experimentally using a 100 V, 500 W laboratory prototype controlled by dspace 1103.
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