Abstract
In this paper, a new transformerless high voltage gain dc-dc converter is proposed for low and medium power application. The proposed converter has high quadratic gain and utilizes only two inductors to achieve this gain. It has two switches that are operated simultaneously, making control of the converter easy. The proposed converter’s output voltage gain is higher than the conventional quadratic boost converter and other recently proposed high gain quadratic converters. A voltage multiplier circuit (VMC) is integrated with the proposed converter, which significantly increases the converter’s output voltage. Apart from a high output voltage, the proposed converter has low voltage stress across switches and capacitors, which is a major advantage of the proposed topology. A hardware prototype of 200 W of the proposed converter is developed in the laboratory to validate the converter’s performance. The efficiency of the converter is obtained through PLECS software by incorporating the switching and conduction losses.
Highlights
High gain dc to dc converters have increasingly become popular due to their suitability in solarPhotovoltaic (PV) systems, electric vehicles, and HVDC transmission systems
The voltage across the diode and switches is lower than the output voltage, which is not valid in the conventional quadratic boost converter
AAvoltage is developed for energy storage application
Summary
High gain dc to dc converters have increasingly become popular due to their suitability in solar. The coupled inductor can be incorporated with VMC to increase the converter’s gain further, but in this case, the number of components may increase, making the circuit bulky and costly [13,14,15] Another high gain converter suitable for electric vehicle applications is proposed in [16]. The paper’s main contribution is the proposed new dc-dc converter with desirable characteristics like high voltage gain with a reduced number of components, low voltage stress on switching devices, and continuous input current. The diodes and capacitors have low voltage stress, leading to the selection of low voltage rating devices and subsequently improving the converter’s efficiency To achieve this high voltage gain, the coupled inductor is not used, and the problem of leakage inductance and the need for a snubber circuit is avoided.
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