Abstract
Transformerless step-down and step-up DC-DC topologies are currently extensively employed in a variety of applications. A positive output voltage SEPIC-type DC-DC converter without a transformer is proposed in this article. This configuration has the benefit of input continuous current over the traditional buck-boost converter, making it better suited for use with electric vehicles. Moreover, it has an increase in gain that is quadratic of the voltage gain of a standard topology. Also, the suggested converter has a constant current output, which decreases the output voltage ripple and reduces the current stress on the converter's output capacitor. As a result, this converter can generate an extensive range of voltages with less input and output ripples. In addition, closed loop control of DSMST converter is presented in the paper using PI control Ziegler- Nichols method. In the end, simulation findings are shown to support the converter's closed loop study.
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