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Energies 2018, 11(6), 1508; https://doi.org/10.3390/en11061508

A New Diagnostic Algorithm for Multiple IGBTs Open Circuit Faults by the Phase Currents for Power Inverter in Electric Vehicles

1
Laboratory of Low Emission Vehicle, Beijing Institute of Technology, Beijing 100081, China
2
National Lab of Auto Performance and Emission Test, Beijing Institute of Technology, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Received: 27 April 2018 / Revised: 5 June 2018 / Accepted: 8 June 2018 / Published: 10 June 2018
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Abstract

In order to simplify the application and improve diagnostic speed of the diagnostics, a novel method to diagnose multiple open circuit faults in insulated gate bipolar transistors (IGBTs) by three-phase currents for power inverter in electric vehicles is presented. The summation of currents with semi-period phase-difference is described in diagnostic variables with exploration of the current information in faulty condition. In contrast with plentiful existing methods which rely on the motor models and control parameters, this algorithm merely requires phase currents. Meanwhile, the normalized way based on the absolute phase currents and variable parameter moving average method are applied to improve the diagnostic speed and independence of load variation, which contributes to the real-time application in the electric vehicles. Experimental results, using a vector-controlled permanent magnet synchronous motor (PMSM) and digital signal processor MC56F8346, are presented to verify the algorithm effectiveness, showing many features, such as applicability for multiple open circuit faults, well-robustness against false alarms, briefness and agility for the diagnosis function. View Full-Text
Keywords: multiple open circuit faults; fault diagnosis; insulated gate bipolar transistor (IGBT); AC motor inverter; electric vehicles. multiple open circuit faults; fault diagnosis; insulated gate bipolar transistor (IGBT); AC motor inverter; electric vehicles.
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wei, H.; Zhang, Y.; Yu, L.; Zhang, M.; Teffah, K. A New Diagnostic Algorithm for Multiple IGBTs Open Circuit Faults by the Phase Currents for Power Inverter in Electric Vehicles. Energies 2018, 11, 1508.

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