Adaptive SVM to compensate DC-Link voltage ripple for four-switch three-phase voltage-source inverters

An adaptive space vector modulation (SVM) approach to compensate the de-link voltage ripple in a B4 inverter is proposed and examined in detail. The theory, design, and performance of this pulsewidth modulation (PWM) method are presented, and the method effectiveness is demonstrated by extensive simulations and experiments. High-quality output currents are guaranteed by this approach even with substantial de-voltage variations that might be caused by an unbalanced ac supply system, the diode rectification of the line voltages, and circulation of one output phase current through the split capacitor bank. The application of this approach to induction machine drives is also discussed, It is concluded that the de-voltage ripple effect on the B4 inverter output can be minimized by an adaptive SVM algorithm with the advantage of improving the response of the de-link filter and the output quality of the inverter becoming high.