Multilevel inverters are a different method to construct DC/AC inverter. This idea was published by Nabae in 1980 in an IEEE international conference IEEE APEC’80 [1], and the same idea was again published in 1981 in IEEE Transactions on Industry Applications [2]. Actually, multilevel inverters are a different technique from PWM method, which requires vertically chopping a reference waveform to achieve the similar output waveform (e.g., sine-wave) Multilevel inverting technique involves horizontally accumulating the levels to achieve the waveform (e.g., sine-wave).
Soft-switching technique was implemented in DC/DC conversion for more than 20 years. We also would like to introduce soft-switching ...
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