Reliability challenge for impedance network‐based DC‐DC boost converters

Abstract

Summary In this paper, reliability evaluation is proposed for some of the most famous impedance network‐based DC‐DC boost converters. Markov reliability approach is used to evaluate the reliability of the converters. Also, some other factors such as components' failure rates, reliability functions, and mean time to failures are introduced and evaluated. Detailed explanations for the evaluation methods of the mentioned factors are also provided in the context of the paper. In addition to the mathematical analysis, numerical calculations are also done through the simulation results of the converters. Simulations are done in PSCAD/EMTDC. Finally, a numerical and graphical reliability comparison is provided for the mentioned converters. The purpose of this paper is to give a comprehensive reliability evaluation and comparison for some of the most popular impedance network‐based DC‐DC converters. In addition, this paper gives a detailed reliability analysis that can be used in reliability assessment of all types of power electronic converters, so it can help the researchers to consider reliability calculations into their designing.

A non‐isolated switched inductor‐capacitor cell based multiple high voltage gain DC‐DC boost converter

“…The Markov reliability method in a previous study, 35 and data from the military handbook MIL‐HDBK‐217F 36 are used to estimate the reliability of the proposed converter in both working modes. Military Handbook 217F is a popular resource for determining the component failure rate.…”

“…It is considered that the perturbations are much smaller than the steady-state values. By substituting Equations ( 33) and ( 34) into (35), the small-signal model of the converter for the two operating modes can be obtained, and it can be represented in matrix form as follows:…”

A Family of High Step-Up Soft-Switching Integrated Sepic Converter With Y-Source Coupled Inductor

“…Structural improvement through the cooperation of each component can improve the voltage gain, as that can also realize the soft-switching function and gradually form the impedance network research. The classical DC-DC converters based on an impedance network are summarized, where the coupled inductor impedance network is more widely used and more reliable [22]. The introduction of coupled inductors can effectively and flexibly increase the gain without increasing the number of components.…”

Tapped inductor based switched boost inverter: Analysis and implementation

“…Conventional voltage source inverters could not gain public satisfaction due to their lack of amplification capability. Meanwhile, research on buck‐boost inverters called Z‐source inverters has developed rapidly 1–8 . Studies on modulation, size, dynamics, and control of this type of inverters have been performed in previous studies 9–11 .…”

“…Z‐source inverters with voltage sources are divided into two types of switched and nonswitched networks based on the type of impedance source network. Different types of inverters with switched Z‐source network and their differences with other types of these converters are introduced in Mehdi Haji‐Esmaeili and Babaei 2 . Inverters with switched impedance source networks can increase the voltage and convert dc to ac voltage using passive and semiconductor elements inside their impedance network by using different switching methods 16,17 …”