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首页> 外文期刊>Power Electronics, IEEE Transactions on >Application of an Efficient Rogowski Coil Sensor for Switch Fault Diagnosis and Capacitor ESR Monitoring in Nonisolated Single-Switch DC–DC Converters
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Application of an Efficient Rogowski Coil Sensor for Switch Fault Diagnosis and Capacitor ESR Monitoring in Nonisolated Single-Switch DC–DC Converters

机译：高效Rogowski线圈传感器在非隔离式单开关DC-DC转换器中的开关故障诊断和电容器ESR监控中的应用

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摘要

Power switches and electrolytic capacitors are the most vulnerable components in the power electronic converters. Any failure in these components may result in severe damages, if no remedial action is employed. Prior to any remedy, the first step is fault diagnosis. In this paper, a new type of Rogowski coil sensor is proposed. The sensor captures the inductor current derivative, which contains suitable signatures for switch fault diagnosis and capacitor lifetime monitoring in nonisolated single-switch dc–dc converters. Using the captured signal, detection of switch open-circuit and short-circuit faults is realized by a simple logic circuit. Furthermore, a new capacitor lifetime monitoring technique is proposed, which employs this signal for calculating equivalent series resistance of the capacitor. The proposed sensor has some remarkable advantages. Due to its nonmagnetic core, the problem related to nonlinear response of magnetic cores at high frequencies will not be encountered. Furthermore, the proposed cost-efficient approach can be easily implemented even for already fabricated converters. The performance of the proposed sensor is evaluated using some finite-element simulations and experiments for a buck converter. The results confirm the capabilities of the sensor for switch fault diagnosis and capacitor lifetime monitoring in nonisolated single-switch dc–dc converters.
机译：电源开关和电解电容器是电力电子转换器中最易损坏的组件。如果不采取任何补救措施，则这些组件的任何故障都可能导致严重损坏。在采取任何补救措施之前，第一步是故障诊断。本文提出了一种新型的Rogowski线圈传感器。传感器捕获电感电流导数，其中包含合适的信号，用于非隔离单开关dc-dc转换器中的开关故障诊断和电容器寿命监控。利用捕获的信号，可以通过简单的逻辑电路来检测开关的开路和短路故障。此外，提出了一种新的电容器寿命监测技术，该技术利用该信号来计算电容器的等效串联电阻。所提出的传感器具有一些显着的优点。由于其非磁芯，将不会遇到与磁芯在高频下的非线性响应有关的问题。此外，即使对于已经制造的转换器，所提出的具有成本效益的方法也可以容易地实现。提出的传感器的性能通过降压转换器的一些有限元模拟和实验进行评估。结果证实了该传感器具有在非隔离式单开关dc-dc转换器中进行开关故障诊断和监视电容器寿命的功能。

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