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Application of Kalman Filter to Estimate Junction Temperature in IGBT Power Modules

Eleffendi, Mohd. Amir; Johnson, Christopher Mark

Authors

Mohd. Amir Eleffendi eexmae@exmail.nottingham.ac.uk

MARK JOHNSON mark.johnson@nottingham.ac.uk
Professor of Advancedpower Conversion



Abstract

Knowledge of instantaneous junction temperature is essential for effective health management of power converters, enabling safe operation of the power semiconductors under all operating conditions. Methods based on fixed thermal models are typically unable to compensate for degradation of the thermal path resulting from aging and the effect of variable cooling conditions. Thermosensitive electrical parameters (TSEPs), on the other hand, can give an estimate of junction temperature TJ, but measurement inaccuracies and the masking effect of varying operating conditions can corrupt the estimate. This paper presents a robust and noninvasive real-time estimate of junction temperature that can provide enhanced accuracy under all operating and cooling conditions when compared to model-based or TSEP-based methods alone. The proposed method uses a Kalman filter to fuse the advantages of model-based estimates and an online measurement of TSEPs. Junction temperature measurements are obtained from an online measurement of the on-state voltage, VCE(ON) , at high current and processed by a Kalman filter, which implements a predict-correct mechanism to generate an adaptive estimate of TJ. It is shown that the residual signal from the Kalman filter may be used to detect changes in thermal model parameters, thus allowing the assessment of thermal path degradation. The algorithm is implemented on a full-bridge inverter and the results verified with an IR camera

Journal Article Type Article
Publication Date 2016-02
Journal IEEE Transactions on Power Electronics
Print ISSN 0885-8993
Electronic ISSN 1941-0107
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 31
Issue 2
Pages 1576-1587
APA6 Citation Eleffendi, M. A., & Johnson, C. M. (2016). Application of Kalman Filter to Estimate Junction Temperature in IGBT Power Modules. IEEE Transactions on Power Electronics, 31(2), 1576-1587. https://doi.org/10.1109/TPEL.2015.2418711
DOI https://doi.org/10.1109/TPEL.2015.2418711
Keywords Kalman filters; Semiconductor junctions; Temperature measurement; Thermography (temperature measurement)
Electrical parameter; Health management; Junction temperatures; Real time; Solder fatigue
Insulated gate bipolar transistors (IGBT)
Publisher URL http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7073633
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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