In EVs and HEVs, there are different ranges of voltage conversions, from very low (0.8 V) to very high (450 to 800 V). This has sparked an interest in developing new techniques to produce DC/DC converters that are not only efficient and provide the precise value for a certain application but also offer fewer power losses. For high voltage gain, an LC resonant tank is used, which has a shortcoming that is load-dependent and also produces reactive current, which reduces the efficiency.2 To overcome this shortcoming, a transformer with a large number of turns is used for high voltage gain.3,4 A large number of turns introduces large leakage current that causes a voltage drop, which lowers the voltage gain of the conversion. Although a capacitor in series can be used to compensate for the voltage drop, it’s a difficult approach to achieve a high voltage gain.5,6 In this article, we will discuss resonant inductive boosting DC/DC converters with very high voltage gain. They feature a single switch resonant inverter, which provides an AC voltage of high frequency to the transformer, and a Cockcraft-Walton (CW) multiplier, which rectifies the output of the transformer and boosts it up to a high DC voltage.

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