A Fault-Tolerant DC-DC Buck Converter with Zero Interruption Time for Autonomous Vehicles

IF 1.4 4区工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY

Scientia Iranica Pub Date : 2023-10-09 DOI:10.24200/sci.2023.61387.7283

Preethi Sharma K., Vijayakumar T.

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引用次数: 0

Abstract

A high-end autonomous vehicle is expected to have at least a hundred different electronic subsystems. Each one of them takes power from the battery through Power Management Unit (PMU). Having an efficient PMU is crucial and is expected to supply the required level of uninterrupted power. PMU consists of several buck converters which translate a higher voltage level to required lower voltage levels. A PMU is more reliable if it consists efficient and well-structured voltage converters. In this paper, a fault-tolerant buck converter is designed which outputs 3.3 volts. A simple yet effective technique is proposed to design a fault-tolerant buck DC-DC converter by bypassing the faulty converter leg. The proposed system utilizes a signal processing-based method for fault detection. The secondary converter is activated only upon the confirmed prognosis of a faulty primary converter. Ripple content in the output Aluminum Electrolytic Capacitor (AEC) voltage is monitored and used as a primary health indicator for the converter. An experimental setup is built and tested in the laboratory. Experimental results indicate a smooth transition from the primary converter to the secondary demonstrating an uninterrupted power supply along with the simplicity and effectiveness of the proposed solution.

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自动驾驶汽车零中断容错DC-DC降压变换器

一辆高端自动驾驶汽车预计至少有100个不同的电子子系统。每一个都通过PMU (power Management Unit)从电池中获取电力。拥有一个高效的PMU是至关重要的，预计将提供所需的不间断电源水平。PMU由几个降压转换器组成，这些转换器将较高的电压水平转换为所需的较低电压水平。如果PMU包含高效且结构良好的电压变换器，则PMU更加可靠。本文设计了一种输出3.3伏的容错降压变换器。提出了一种简单而有效的设计容错降压型DC-DC变换器的方法，即绕过故障变换器支路。该系统采用基于信号处理的方法进行故障检测。只有在确认一次变流器故障的预后后，二次变流器才被激活。监测输出铝电解电容器(AEC)电压中的纹波含量，并将其用作转换器的主要健康指标。建立了实验装置并在实验室进行了测试。实验结果表明，从一次变换器到二次变换器的平滑过渡证明了不间断电源，以及所提出的解决方案的简单和有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scientia Iranica 工程技术-工程：综合

CiteScore

2.90

自引率

7.10%

发文量

审稿时长

2 months

期刊介绍： The objectives of Scientia Iranica are two-fold. The first is to provide a forum for the presentation of original works by scientists and engineers from around the world. The second is to open an effective channel to enhance the level of communication between scientists and engineers and the exchange of state-of-the-art research and ideas. The scope of the journal is broad and multidisciplinary in technical sciences and engineering. It encompasses theoretical and experimental research. Specific areas include but not limited to chemistry, chemical engineering, civil engineering, control and computer engineering, electrical engineering, material, manufacturing and industrial management, mathematics, mechanical engineering, nuclear engineering, petroleum engineering, physics, nanotechnology.