Single-switch high-gain coupling inductor Boost converter

Abstract

The invention belongs to the technical field of DC-DC conversion devices, and relates to a single-switch high-gain coupling inductor Boost converter which comprises a power supply, a power switch tube, a first energy storage capacitor, a second energy storage capacitor, an output capacitor, a first diode, a second diode, a three-coupling winding, an input inductor and a load, wherein the three-coupling windingis composed of a first coupling inductor, a second coupling inductor and a third coupling inductor, the dotted terminal of the first coupling inductor is connected with the synonym terminal of the second coupling inductor and the dotted terminal of the third coupling inductor, and the other end of the first coupling inductor is connected with the positive electrode of the output capacitor and the positive electrode of the load; the dotted terminal of the second coupling inductor is connected with the cathode of the first diode; and the synonym end of the third coupling inductor is connected with the positive electrode of the first energy storage capacitor. The single-switch high-gain coupling inductor Boost converter is reasonable in overall design, is safe to use and simple to operate, is less in used devices and low in design cost, and is capable of reducing the device loss and improving the working efficiency of a circuit, and has greater application potential.

Description

Technical field: [0001] The invention belongs to the technical field of DC-DC conversion equipment, and relates to a single-switch high-gain coupled inductance Boost converter. Background technique: [0002] At present, the energy crisis and environmental pollution problems are intensifying, which promotes the rapid development of clean energy and green energy. With the rapid development of clean energy power generation trends such as solar energy, clean energy power generation has received more and more attention and applications. Among them, photovoltaic cells, fuel cells, and wind power generation are the most important. In practical applications, these power conversion circuit structures must have the characteristics of high efficiency and high boost gain. However, due to the low boost capability of a single module during the energy conversion process, a higher output voltage cannot be obtained. [0003] For example, photovoltaic power supply is one of the more widely ...

AI Technical Summary

Problems solved by technology

In the existing research, there are traditional topologies that can achieve the purpose of boosting, such as Boost, Buck-Boost, Sepic, etc. They are simple in structure and easy to control, but they need the circuit to work at the limit duty cycle for a long time However, this is difficult to achieve, so it is still impossible to achieve higher and more ideal voltage gain and higher efficiency

With the deepening of research, some new topological structures have emerged, which achieve high voltage gain by introducing unit modules such as switched inductors, coupled inductors, or cascaded converters, but there are still some shortcomings, such as due to The existence of leakage inductance will make the device withstand higher voltage spikes, and the increase in the number of devices will increase the cost of the converter itself, increase the volume, increase the difficulty of control, and lower the efficiency

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