Fault Diagnosis of PWM DC–DC Converters Based on Magnetic Component Voltages Equation
Fault Diagnosis of PWM DC–DC Converters Based on Magnetic Component Voltages Equation
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DOI：
10.1109/tpel.2013.2283881
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发表时间：
2014-09
影响因子：
6.7
通讯作者：
Songsong Nie;Xuejun Pei;Yu Chen;Y. Kang
中科院分区：
文献类型：
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作者：
Songsong Nie;Xuejun Pei;Yu Chen;Y. Kang
开关故障诊断是脉宽调制（PWM）DC-DC功率变换器设计的一个重要方面。它可以防止电源转换器进一步损坏，并为补救措施做好准备。本文提出了一种适用于连续导通模式PWM DC-DC变换器的快速开关故障诊断方法。该方法利用磁元件（电感或Transformer）的电压进行故障诊断。基于实时电压测量和开关门极驱动信号，快速提取开关开路故障和短路故障的特征，从而可以快速检测开关故障。磁分量电压可以通过磁芯中的辅助绕组测量，并且栅极驱动信号可以容易地从控制电路获得。此外，故障检测可以通过低成本的逻辑硬件电路来实现，并且该电路可以集成到控制电路中。本文讨论了故障诊断原理、设计思想和实现方法。实验验证了理论分析的正确性。
Switch fault diagnosis is an important design aspect for pulse width modulation (PWM) dc-dc power converters. It can prevent power converters from further damage, and also make preparations for remedial actions. In this paper, a fast switch fault diagnostic method is proposed for PWM dc-dc converters operating in continuous conduction mode. The proposed method utilizes the magnetic component (inductor or transformer) voltage for fault diagnosis. Based on the real-time voltage measurement and switch gate-driver signals, characteristics of switch open-circuit faults and short-circuit faults are rapidly extracted, and thus, switch faults can be quickly detected. The magnetic component voltage can be measured by an auxiliary winding in the magnetic core, and gate-driver signals can be easily got from the control circuit. Moreover, the fault detection can be implemented by a low-cost logical hardware circuit, and this circuit can be integrated into the control circuit. The fault diagnosis principle, design considerations, and implementation are discussed in this paper. Experiments are conducted to verify the theoretical analysis.