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Ultra-Sensitive Monitoring of Line-End Coil Insulation Degradation in Inverter-Fed Machine Using PT Symmetry
IEEE Transactions on Industrial Electronics
Year: 2025 | Early Access Article |
The line-end coil insulation, a vulnerable point in winding insulation, is subjected to higher transient voltage stress and a greater risk of breakdown, making it both attractive and challenging to monitor at an early stage. To improve the sensitivity of early line-end coil insulation monitoring, this article proposes a novel approach based on parity-time (PT) symmetry, utilizing an external reson...Show More
An Improved Power Cable Insulation Monitoring Method for Inverter-Fed Machines Using Switching Oscillation Damping Feature
Hao Li;Jinlong Ma;Dawei Xiang;Pengju Gao;Sitian Zhu;Pinjia Zhang
Online cable condition monitoring is a reliability enhancement technique for inverter-fed machine systems, which requires high sensitivity with quantitative assessment capability to detect the incipient insulation degradation as early as possible. This article presents a noncontact cable condition monitoring method by utilizing the inverter's self-excited high-frequency (HF) pulsewidth modulation ...Show More
Improved Oscillation Method for High-Frequency Magnetic Core Loss Measurement
Dawei Xiang;Zhiwen Sun;Hao Li;Hangkang Hu;Hongsheng Zhong;Guolin Lu
Accurate measurement of magnetic core loss is of great significance for magnetic and thermal design for power electronic converters operating at high frequencies. However, the commonly used two-winding method is difficult for ultrahigh frequency measurement due to the voltage and current phase error. The oscillation method presents a promising solution for high-frequency applications, albeit with ...Show More
A Noncontact Open-Circuit Fault Detection Method for VSI Systems Using High-Frequency Common-Mode Switching Oscillations
Fault diagnosis is essential for enhancing the reliability of voltage source inverter (VSI) systems. This article proposes a rapid, noncontact method for detecting open-circuit faults (OCFs) in VSI systems. The high-frequency common-mode (HFCM) switching oscillation current is noninvasively captured as a novel indicator. The integrity of the HFCM oscillation signal is utilized to detect and locate...Show More
A Fast and Robust Open-Circuit Fault Detection Method for Voltage-Source-Inverter With Integrated High-Frequency Sensor
Efficient fault detection is essential for the safety and reliability of voltage source inverters (VSIs), particularly the rapid and robust detection of open-circuit faults (OCFs) under dynamic conditions. This study proposes a novel OCF detection method for VSI, employing a high-frequency (HF) sensor embedded in a traditional Hall current sensor to detect HF switching oscillations. First, the cau...Show More
A Study of Brain Mechanisms by Which Sound Source Location and Amount of Masking Affect Target Perception
2024 IEEE 14th International Symposium on Chinese Spoken Language Processing (ISCSLP)
Year: 2024 | Conference Paper |
In the cocktail-party listening environments, listeners can selectively focus their attention on the positions of the target speaker according to their communicative intentions, suppress the influence of other speech, and effectively process the semantic information of the target speech. However, it is not clear how factors such as the positional relationship and the number of interfering speech a...Show More
Modal-Oriented High-Frequency Common-Mode Switching Oscillation Suppression in Inverter-Fed Machines Using Parity-Time Symmetry
The suppression of high-frequency (HF) common-mode (CM) switching oscillations in inverter-fed machine systems is a critical yet challenging task, primarily due to the presence of self-resonance in CM propagation paths, such as parasitic parameters of the filter. This article presents a novel approach based on parity-time (PT) symmetry to mitigate HFCM switching oscillation by utilizing a magnetic...Show More
A Hybrid Physics-Based and Data-Driven Approach for Monitoring of Inverter-Fed Machine Stator Insulation Degradations Using Switching Oscillations
Inverter-fed machines are widely used in many important industrial applications. However, the machine stator groundwall and/or turn insulation are prone to failure suffering the inverter's high dv/dt. It is necessary to identify them as early as possible but challenging due to their coupled and weak symptoms. In this article, a hybrid physics-based and data-driven approach is proposed to monitor i...Show More
Noncontact SiC MOSFET Switching Time Monitoring in DC–DC Converter Using Switching Oscillation Amplitude Feature
Dawei Xiang;Yipeng Li;Hao Li;Yunpeng Xiao;Xin Tian;Xinyu Han
The switching time of a silicon carbide metal–oxide–semiconductor field-effect transistor (SiC mosfet) is a crucial parameter that provides valuable insights into the device's operational performance and health status. However, direct measurement of switching time from the drain-source voltage or gate-source voltage may pose challenges in terms of safety and precision. To address these difficultie...Show More
Offline Quantitative Evaluation of Electrical Machine Insulation Through Common-Mode Impedance Resonance Frequency Perturbation
Identifying high-frequency common-mode parameters is crucial for assessing the insulation health of inverter-fed machine systems. However, this task presents significant challenges due to the frequency-dependent effects on winding inductance and resistance. To overcome these difficulties, this article proposes a method for common-mode parameter identification based on resonance frequency perturbat...Show More
Online Monitoring of Lithium-Ion Battery Impedance Using DC–DC Converter Self-Excited Switching Oscillations
Dawei Xiang;Chen Yang;Hao Li;Yiheng Zhou;Yueyang Cao;Zhiwen Sun;Qiang Xie
Online impedance monitoring is an important technique for acquiring the condition information of a Lithium-ion (Li-ion) battery (e.g., state of charge and internal temperature) for safe, reliable, and efficient operation. The existing ac excitation/response method (Z(jω) = V(jω)/I(jω)) may interact with the system's normal operation leading to an interrupted measurement and degraded accuracy. To a...Show More
Online Monitoring of Cable Insulation Degradation for Inverter-Fed Machine System Using PWM Switching Oscillations
Online cable condition monitoring is a reliability enhancement technique for inverter-fed machine systems, which requires high sensitivity with quantitative assessment capability to detect the incipient insulation degradation as early as possible. This article presents a noncontact cable condition monitoring method by utilizing the inverter's self-excited high-frequency (HF) pulsewidth modulation ...Show More
A Switching Oscillation Event-Triggered Switch Fault Detection Method for SiC DC–DC Converter
Switch fault detection is critical for the safety and reliability of a SiC dc–dc converter, which is however difficult by directly comparing the PWM voltage and the gate signal due to the harsh electromagnetic environment and ultrahigh switching frequency. To address the challenges, a novel method is proposed to detect and diagnose the switch fault using the converter PWM high-frequency (HF) switc...Show More
Online Monitoring of Lithium-Ion Battery Internal Temperature Using PWM Switching Oscillations
Dawei Xiang;Chen Yang;Hao Li;Yiheng Zhou;Sitian Zhu;Yipeng Li
Online monitoring of Lithium-ion (Li-ion) battery internal temperature by electrochemical impedance spectrum (EIS) is important for the system safe and reliable operation. However, it is challenging in the high temperature region due to the limited thermal sensitivity. Moreover, additional signal injection or disturbance for online EIS measurement may interact with the operating system. To address...Show More
A High-Speed IGBT Switching Characteristic Detection System Based on SoC and FPGA Acceleration
2022 7th International Conference on Power and Renewable Energy (ICPRE)
Year: 2022 | Conference Paper |
As an important condition parameter, turn-off time of insulated gate bipolar transistor (IGBT) has a close relationship with junction temperature and device health state. Researches show that it is effective to monitor the health state of IGBT by measuring turn-off time of each switching and junction temperature. However, traditional methods of calculating turnoff time either directly measure coll...Show More
Online Condition Monitoring of Line-End Coil Insulation for Inverter-Fed Machine by Switching Oscillation Mode Decomposition
Online condition monitoring of winding insulation has been proved to be an effective means to improve the reliability of an inverter-fed machine, but little work has been done on the insulation of line-end coil subjected to much higher transient voltage stress with a higher risk of premature insulation break down. In this article, the inverter self-excited high-frequency switching oscillations are...Show More
An Investigation into the Effect of Bearing Grease Degradation on the High-frequency $dv/dt$ Bearing Current in an Inverter-fed Motor System
2021 6th International Conference on Power and Renewable Energy (ICPRE)
Year: 2021 | Conference Paper |
Cited by: Papers (2)
Bearing is one of the key components in an inverter-fed motor system, whose lubrication performance is important for the safety and reliability of system. In this paper, from the perspective of bearing grease condition monitoring, the high-frequency (HF) $dv/dt$ bearing current generated by the inverter PWM switching is studied. First, the generation mechanisms and circulating paths of bearing cur...Show More
Research on the Gate-oxygen Aging Trend of Power Electronic Device
Guoqing Xu;Yi Hu;Lingfeng Shao;Dawei Xiang;Fei Han;Yanhui Zhang
2021 4th International Conference on Energy, Electrical and Power Engineering (CEEPE)
Year: 2021 | Conference Paper |
Cited by: Papers (1)
The introduction of fully electric vehicles (FEVs) into the mainstream has raised concerns about the reliability of their electronic components such as IGBT. The great variability in Insulated Gate Bipolar Translator (IGBT) failure times caused by the very different operating conditions experienced and the stochasticity of their degradation processes suggests the adoption of condition-based mainte...Show More
Noncontact Monitoring of IGBT Turn-OFF Time Using PWM Switching Ringing for Inverter-Fed Machine Systems
Dawei Xiang;Ning Zhao;Hao Li;Xinyu Zhang;Yan Zheng;Chen Yang;Yunpeng Xiao
Turn-off time is an important condition parameter for insulated gate bipolar transistor (IGBT), which could provide useful information on the device junction temperature and its state of health. Currently, it is measured directly from the IGBT collector-emitter voltage Vce or indirectly from the gate side, which may cause problems of safety and complexity for a power converter operating in a harsh...Show More
Online Monitoring of Incipient Turn Insulation Degradation for Inverter-Fed Machine Using Sensitive Tail Component in PWM Switching Oscillations
A failure of insulation is one of the main reasons for electric machine outage. Online condition monitoring (CM) of an incipient degradation of turn insulation could eliminate the potential fault at the early stage, which is attractive but challenging. To improve the sensitivity and availability of CM, a noninvasive technique is presented in this article for the inverter-fed electric machine utili...Show More
Online ESR Monitoring of DC-Link Capacitor in Voltage-Source-Converter Using Damping Characteristic of Switching Ringings
Online monitoring of dc-link capacitor's equivalent series resistance (ESR) could provide valuable and timely information for power converter failure prognosis and predictive maintenance. The conventional ESR estimation methods are mainly based on pulsewidth modulation (PWM) voltage and current ripples (ESR≈Δuc/Δic), but the performance is affected by operating conditions (especially at light-load...Show More
With the wide application of insulated gate bipolar transistor (IGBT), it is becoming more and more important to understand the failure mechanisms of power electronic devices. So far, many efforts have been made to improve the IGBT reliability by condition monitoring. However, most of the existing literatures aim at the prognosis of IGBT package-related failures, such as solder fatigue and bonding...Show More
High-Accuracy Capacitance Monitoring of DC-Link Capacitor in VSI Systems by LC Resonance
Monitoring the condition of a dc-link capacitor is important for the reliability-critical voltage source inverter (VSI) systems. With the ever increasing application of a metalized poly propylene film (MPPF) capacitor, a new challenge for dc-link capacitor condition monitoring (CM) is presented due to the very small equivalent series resistance and capacitance end-of-life criterion (typically 2%-5...Show More
Compressed Sensing Method for IGBT High-Speed Switching Time On-Line Monitoring
Condition monitoring (CM) has been considered as a promising technique to improve the reliability of insulated gate bipolar transistors (IGBTs). Among various condition parameters, switching time is a good health status indicator to detect IGBT failures. However, on-line monitoring of the IGBT high-speed switching time is still difficult in practice due to the requirement of the extremely high sam...Show More
Diode Junction Temperature Measurement from Power Converter Output Voltage
2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
For power electronics devices, the junction temperature that can be measured by the Temperature Sensitive Electrical Parameter(TSEP) indirectly is a key condition variable. In this paper, the dv/dt of converter output voltage is measured as the TSEP for diode junction temperature, which mainly depends on the reverse recovery characteristic affected by temperature and current. To clarify the method...Show More
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