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Soft-Switching DC/AC Inverters

The soft-switching technique has been implemented in DC/DC conversion for more than 25 years. We also would like to introduce this technique in DC/AC inverters in this chapter.

There are numerous ways of implementing soft-switching methods, such as zero voltage switching (ZVS) and zero current switching (ZCS), to reduce the switching losses and to increase efficiency for different multilevel inverters. For the cascaded multilevel inverter, because each inverter cell is a two-level circuit, the implementation of soft switching is not at all different from that of conventional two-level inverters. For capacitor- or diode-clamped inverters, however, the choices of soft switching circuit involve different circuit ...

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