A Novel Resonant-Based Soft Switched Capacitor DC-DC Converter Topology for High Voltage and High Gain Application

• Main Authors: K, Ashwin, K, Nakul Narayanan, Umanand, L, Reddy B, Subba
• Format: Conference Proceeding
• Language: English
• Subjects: Capacitance; Capacitors; High-voltage techniques; resonant based converter; Switched Capacitor Converter; Switches; Switching frequency; Switching loss; Topology; ZCS; Zero Current Switching
• ISSN: 2642-5289
• DOI: 10.1109/PIICON56320.2022.10045191

Switched Capacitor Converters (SCC) are gaining popularity due to their advantages, such as high energy density, high efficiency, compactness, and minimal cost and their applicability under a broad range of applications. SCC's are of two types-hard switched and soft switched. The hard switched converter possesses some severe drawbacks such as using high switching frequency and large value of capacitances to reduce current spikes during switching transients as there are no magnetic components associated with it. However, this adds to increased switching losses and considerably increases space consumption. Hence, a resonant-based soft switched converter is utilized which reduces the switching stresses by introducing Zero Current Switching (ZCS) operation into the converter. The switching frequency and overall capacitance size is also reduced. Several soft switched SCC are proposed in the literature, but they still have issues such as ZCS operation not applicable to all switching devices, usage of multiple inductances, device ratings not optimized for high voltage applications and so on. This paper proposes a novel resonant-based soft switched converter that utilises a single inductance on the input side to achieve ZCS operation of all the switching devices involved within the converter. The proposed converter also optimizes the ratings of the devices such that it can easily be used for high voltage and high gain applications.