High step-down converter using coupled inductor with zero voltage switching

The lack of fossil fuels and environmental problems have led to the attention of receiving green energy and the use of renewable energy sources such as photovoltaic (PV) systems, fuel cells and wind turbines. In order to benefit from these renewable sources, non-isolated DC-DC converters with high reduction are used in many industrial applications, especially photovoltaic renewable sources. If a voltage different from the battery voltage (DC link) is needed, another converter is used to produce the required voltage. This structure is used in various applications such as mobile charging stations, street lighting LEDs, etc. As a result, the first converter acts as an interface circuit between the PV and DC link by increasing the voltage level of the PV panel. On the other hand, the second converter is used to reduce the voltage level of the DC link and feed certain loads. In general, it is very important to achieve a suitable step-down converter with high efficiency that enables the achievement of low voltage, so far many researchers have studied on this topic. In this article, in order to improve the important parameters in such converters, an attempt is made to present a step-down converter using a coupled inductor with zero voltage switching, which has these characteristics. In order to check the presented circuit, the simulation was done in Orcad software, the results of the simulation, which is the voltage and current characteristics of the circuit, were drawn and analyzed for different elements of the circuit. As the results showed, the proposed converter has several basic advantages, such as no overshoot in the transient state and fast response in the output, and the voltage and current components of the output also have a very low fluctuation and distortion compared to the average value of the signal, and this value is less than ۵ ۲% of the average voltage and nominal current in which the circuit is designed.

کلیدواژه ها:

converter ، step-up reducer ، switching ، zero voltage ، coupled inductor