Mohammad Sharifzadeh

TL;DR: A modified conation of single-phase pack U-cell (PUC) multilevel inverter in which the output voltage has higher amplitude than the maximum dc link value used in the topology as a boost operation is proposed.

TL;DR: An active capacitor voltage balancing integrated to the level-shifted half-parabola carrier PWM technique has been designed based on the redundant charging/discharging states to regulate the dc capacitors voltages of PEC9, which allows five-level inverter operation during the four-quadrant switch fault.

TL;DR: Simulation and experimental results validate a good dynamic performance of the proposed hybrid modulation technique in firing the NPC inverter switches to generate low-harmonic voltage waveforms supplying balanced and unbalanced loads while balancing the dc capacitor voltages in a four-wire network with small dc-link capacitors.

TL;DR: Experimental tests' results of a four-leg NPC inverter as UPS application prove the good dynamic performance and accuracy of the proposed implemented switching technique in producing associated pulses for the inverter switches at very low frequency to mitigate/eliminate undesired harmonic orders from the output phase/line voltage waveforms without using bulky filters.

TL;DR: In this paper, a modified selective harmonic mitigation pulse amplitude modulation (SHM-PAM) is presented to cancel all triplen harmonic orders and suitable for single-phase application of five-level type of voltage source inverters.