Reliability Analysis of Buck Converter Considering Failure of Composed Components
Subject Areas :
1 - Department of Electrical Engineering, Dariun Branch, Islamic Azad University, Dariun, Iran
Keywords: buck converter, reliability, failure rate, temperature variation, semiconductors ,
Abstract :
Development in manufacturing of power electronic devices including power diodes, tyristors, switches and transistors such as IGBTs, makes these devices are frequently used in power system. These converters are categorized in four groups including inverters (DC-AC), rectifiers (AC-DC), choppers (DC-DC) and AC-AC converters. The most well-known DC-DC converters are buck, boost, buck-boost and Cuk. Reliability, the ability of a device for performing itself function, is an important topic of power system. In the reliability analysis of a device, different failure modes are taken into account to calculate the failure rate of different components of them for determining its availability. In this paper, reliability of buck converter as a step-down converter is studied. This converter includes inductor, capacitor, diode and transistor. Thus, for evaluating reliability performance of buck converter, the impact of components failure on overall failure of converter is considered. Due to the sensitivity of electronic devices on temperature variation, the impact of temperature variation on the components failure is studied
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