Diagnosing Faults in LLC Resonant Converters
Author Information
Author(s): Zha Xi, Feng Wei, Zhang Xianfeng, Cao Zhonghua, Chen Xinyang
Primary Institution: Chongqing Academy of Agricultural Sciences
Hypothesis
Can a reduced-order interval sliding mode observer effectively diagnose both open-circuit faults and current sensor faults in LLC resonant converters?
Conclusion
The proposed fault diagnosis method significantly enhances the accuracy and robustness of diagnosing faults in LLC resonant converters.
Supporting Evidence
- The method can detect faults in less than 1 ms.
- It effectively differentiates between current sensor faults and open switch faults.
- The approach adapts to varying operational conditions.
- Experimental results validate the robustness of the proposed method.
- It simplifies fault detection by using a single algorithm for multiple fault types.
Takeaway
This study shows a new way to find problems in special electrical devices that help charge electric cars, making it easier to fix them when they break.
Methodology
The study uses a reduced-order interval sliding mode observer to estimate phase currents and detect faults in current sensors and power switches simultaneously.
Limitations
The method may not account for all types of faults or environmental variations that could affect performance.
Digital Object Identifier (DOI)
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