A Hybrid Bipolar DC-Link Converter Based on SEPIC-Cuk Combination

Power converters of DC-DC nature are pivotal to supplying power in electronics, charging equipment, and renewable energy integration along with AC-DC converters. They are frequently used in most of the power supplies of electronic devices as well as dedicated high-energy functionalities including charging battery cells, electroplating, and welding. Furthermore, DC-DC switching regulators not only fulfill the challenging necessities of engineering systems but also satisfy the rigorous standards of vehicles. Having efficient and stable Switched Mode Power Supply (SMPS) converters under extreme duty cycles is not that easy. The Single Ended Primary Inductor Converter (SEPIC) and Cuk converter combination are used in this research to create a blended DCDC converter with a single Insulated Gate Bipolar Transistor (IGBT) switch, thanks to their almost identical circuit configuration. The key advantage of employing one IGBT switch is that synchronization between switches is not necessary, and it can handle remarkably high voltage and high power compared to MOSFET. Additionally, the gate driver design will be sophisticated due to switching between the control terminal and the ground. An experimental simulation was created, and its performance was assessed under higher duty cycles. Consequently, this converter achieves a simple control structure with a high voltage gain, high efficiency, and lowered total harmonic distortion (THD) with the inclusion of two switched inductor blocks to replace both the input inductors of the respective SEPIC and Cuk partitions of the device.