An on-line fault diagnosis method for power electronic drives

Anderson, Jason M.; Cox, Robert W.; Noppakunkajorn, Jukkrit

doi:10.1109/ests.2011.5770922

Cited by 29 publications

(9 citation statements)

References 7 publications

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“…An online monitoring method was presented in [22] which measures the junction temperature of power devices in a voltage source inverter, and this temperature was found directly related to the operating states of the inverter. Online fault diagnosis methods in power electronic drives were described in [23] by measuring capacitor ESR, MOSFET R DS(ON) , and V CE(sat) of IGBT. ESR was calculated from the capacitor voltage and current, and R DS(ON) was calculated from the corresponding ripple voltage and ripple current of the MOSFET.…”

Section: Origin Of Degradation In Power Semiconductor Devicesmentioning

confidence: 99%

Quantifying Device Degradation in Live Power Converters Using SSTDR Assisted Impedance Matrix

Nasrin

Khan

Alam

2014

IEEE Trans. Power Electron.

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A noninterfering measurement technique designed around spread spectrum time domain reflectometry (SSTDR) has been proposed in this paper to identify the level of aging associated with power semiconductor switches inside a live converter circuit. Power MOSFETs are one of the most age-sensitive components in power converter circuits, and this paper demonstrates how SSTDR can be used to determine the characteristic degradation of the switching MOSFETs used in various power converters. An SSTDR technique was applied to determine the aging in power MOSFETs, while they remained energized in live circuits. In addition, SSTDR was applied to various test nodes of an H-bridge ac-ac converter, and multiple impedance matrices were created based on the measured reflections. An error minimization technique has been developed to locate and determine the origin and amount of aging in this circuit, and this technique provides key information about the level of aging associated to the components of interest. By conducting component level failure analysis, the overall reliability of an H-bridge ac-ac converter has been derived and incorporated in this paper.Index Terms-Aging, converter, degradation, failure rate, matrix, mean time to failure (MTTF), reflectometry, reliability, spread spectrum time domain reflectometry (SSTDR).

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Section: Origin Of Degradation In Power Semiconductor Devicesmentioning

confidence: 99%

Quantifying Device Degradation in Live Power Converters Using SSTDR Assisted Impedance Matrix

Nasrin

Khan

Alam

2014

IEEE Trans. Power Electron.

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“…In [8], due to the dominance difference between impedance, ESR and C can be obtained by RMS values of capacitor ripple voltage and current at low and mid frequency. [9][10][11][12] propose the ESR monitor through direct division or FFT analysis with the amplitude of the capacitor voltage and current. In [13], The ESR detection is based on the capacitor's ac losses calculated from voltage and current measurements using a simple low-cost microcontroller.…”

Section: Introductionmentioning

confidence: 99%

“…The MCU's AD conversion read the output voltage at the rising moment of trigger signals while pulse capture is active. Combining with the switching frequency f s and duty cycle D obtained from the trigger circuit, the monitoring program based on the equation(11)(12) namely the calculation model of ESR and C is compiled. The final result is got and displayed in real time.…”

mentioning

confidence: 99%

A novel online ESR and C identification method for output capacitor of buck converter

Yao

Zhou

et al. 2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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As electrolytic capacitor is apt to fail in power circuits, it is very important to monitor its electrical parameters, mainly the equivalent series resistance (ESR) and capacitance (C). A novel non-invasive online monitoring method of capacitor's ESR and C for CCM buck converter is proposed in this paper. Based on the ac component of capacitor voltage, the calculation model is founded. By sampling the PWM signal and output voltage, the method needs no current sensor and is effective for the CCM buck converter operating at different conditions. Implementation of the monitoring system is presented. The experimental results validate the effectiveness of the method.

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“…Approaches for on-line monitoring of capacitor health have been described in the literature, and are relatively easy to implement in digitally controlled drives [5], [6]. In the case of MOSFET and IGBT switches, on the other hand, the focus has been to develop fault-detection schemes that allow one to detect complete device failures such as shorted or open transistors [7], [8], [9], [10], [11].…”

Section: Introductionmentioning

confidence: 99%

On-line condition monitoring for MOSFET and IGBT switches in digitally controlled drives

Anderson

Cox

2011

2011 IEEE Energy Conversion Congress and Exposition

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The early detection of incipient faults is desirable in mission-critical applications such as shipboard propulsion drives. This paper presents an on-line condition-monitoring approach for detecting incipient faults in IGBTs and MOSFETs. The proposed algorithm extracts important device features (i.e VCE,ON and RDS,ON ) and compares them to healthy values recorded over a range of operating conditions. The algorithm is based on principal-components analysis (PCA). An experimental implementation in an IGBT-based drive is described. An on-line feature extraction scheme for MOSFETs is also proposed and demonstrated. This scheme exploits the nature of carrier-based PWM in order simplify the measurement process.

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An on-line fault diagnosis method for power electronic drives

Cited by 29 publications

References 7 publications

Quantifying Device Degradation in Live Power Converters Using SSTDR Assisted Impedance Matrix

Quantifying Device Degradation in Live Power Converters Using SSTDR Assisted Impedance Matrix

A novel online ESR and C identification method for output capacitor of buck converter

On-line condition monitoring for MOSFET and IGBT switches in digitally controlled drives

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