Confrontation of the DC/DC converters  efficiency with soft and hard switching  at high frequencies

Abstract

In this paper, the analysis of power losses of an uninsulated converter with hard switching and a quasi resonant converter with soft switching for different frequencies is carried out. Comparison of the efficiency and power loss of passive components are designed for different switching frequencies. Soft commutation occurs over a wide range of loads due to the placement of a capacitor parallel to the drain leakage of the MDN transistor. Soft switching is an important factor in ensuring a stable electrical circuit operation. The main tasks of the designer is the implementation of a system that will perform its effective work for a minimum of materials. Therefore, first of all, an important comparison of the resources spent and the results obtained, as implemented in this article. Methods of providing soft switching allow to influence qualitatively and quantitatively the physical parameters of the system. In order to evaluate the benefits of soft switching, the power loss of the system can be compared to two cases. Soft commutation occurs over a wide range of loads due to the placement of a capacitor in parallel with the drain-leakage of the transistor, compared with the hard switching of the uninsulated converter. Modern systems are designed in such a way that they can carry out complex operations to use the minimum of materials. Therefore, switching from one operating mode to another is inevitable and absolutely necessary for the purpose of providing productive work. Usually, the switching process is accompanied by a voltage drop on the load or energy dissipation, it arises as a result of closing or unlocking the electric circuit at which there is a jump-like change in the value of the resistance. This article describes the methods for using such phenomena and the performance of the system through their use. Power supply is an important factor in the well functioning of any system that performs its functional purpose, connected with the development and maintenance of human life and the environment, from which, in the first place, the qualitative component of this process depends. In the period of a rapid increase in the level of globalization, the issue of reducing the use of resources and their rational minimization passes from the category of urgent to the issue of priority solution. This article may be useful for those who clearly want to look at the comparison of two processes: hard and soft switching. 

Keywords

References

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Copyright (c) 2019 Петро Вікторович Миколайчук, Валерія Миколаївна Охмак (Автор)