A high gain DC/DC converter with coupled inductor

Abstract

A DC / DC boost convert with non-isolated high gain is provided. The converter consists of a coupling inductor, an inductor, a single power switch, three capacitors and four diodes. The energy stored inthe leakage inductor of the coupling inductor is recovered by the passive voltage clamping circuit, so that the pulse of the power switch is reduced, the loss is reduced, and the efficiency is improved. Since the inductor is used in series with the input source, the input current of the converter is continuous, thus achieving low current ripple, while the input current can be used for maximum power point tracking of renewable energy sources, such as photovoltaic panels. On the other hand, high voltage gain facilitates increasing the panel voltage of the converter.

Description

technical field [0001] The invention relates to a high-gain DC / DC converter with coupling inductance, which belongs to the field of electricity. Background technique [0002] In recent years, rising environmental awareness and dwindling fossil fuel reserves have made renewable energy the new favorite. Fuel cells (F.C.), photovoltaics (PV) and wind energy are among the renewable energy sources mentioned above, but their output voltages are very low. In order to obtain a higher voltage, the photovoltaic panel modules can be connected in series, but this method also has some disadvantages, such as under partial shading conditions. Therefore, in order to increase its very low input voltage to a suitable high voltage, it is very important to choose a suitable high-gain DC-DC converter. Many high-gain topologies have been proposed, such as: secondary Boost-Zeta converters, cascaded high-order converters, multilevel boost converters, transformerless boost converters, and flyback ...

AI Technical Summary

Problems solved by technology

However, these converters have disadvantages such as low efficiency, many components, and high cost

The use of coupled inductors is one of the techniques to increase the output voltage. However, this converter has some disadvantages, such as the voltage spike on the main switch due to the leakage inductance of the coupled inductor. At this time, the energy stored in the coupled inductor affects the switching The parasitic capacitance of the sensor is charged, so a voltage clamp circuit can be used to solve this problem, and the energy stored in the leakage inductor can be recovered

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