Typical faults and safety analysis of brake controller for AC locomotive

Yujie Ren, Hai Chi
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Abstract

PurposeThe brake controller is a key component of the locomotive brake system. It is essential to study its safety.Design/methodology/approachThis paper summarizes and analyzes typical faults of the brake controller, and proposes four categories of faults: position sensor faults, microswitch faults, mechanical faults and communication faults. Suggestions and methods for improving the safety of the brake controller are also presented.FindingsIn this paper, a self-judgment and self-learning dynamic calibration method is proposed, which integrates the linear error of the sensor and the manufacturing and assembly errors of the brake controller to solve the output drift. This paper also proposes a logic for diagnosing and handling microswitch faults. Suggestions are proposed for other faults of brake controller.Originality/valueThe methods proposed in this paper can greatly improve the usability of the brake controller and reduce the failure rate.
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交流机车制动控制器的典型故障和安全分析
目的 制动控制器是机车制动系统的关键部件。本文总结分析了制动控制器的典型故障,提出了位置传感器故障、微动开关故障、机械故障和通信故障四类故障,并提出了提高制动控制器安全性的建议和方法。本文提出了一种自判断、自学习的动态校准方法,该方法综合了传感器的线性误差和制动控制器的制造和装配误差,解决了输出漂移问题。本文还提出了诊断和处理微动开关故障的逻辑。原创性/价值本文提出的方法可大大提高制动控制器的可用性并降低故障率。
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