Saft America

Christopher Thorpe

Ali Zenati

Theodore Brown

The present invention is notably directed to methods for estimating a degradation of an electronically controlled electro-mechanical switch. The methods comprise determining a change of state of the contactor. They also comprise, computing, for each determined change of state, a wear increment Wof the contactor by: identifying a wear coefficient using a mapping between a last measured current through the contactor and a current range associated with a given wear coefficient; computing the actual wear Wof the contactor by adding the computed wear increment Wto a former known wear Wof the contactor.

Direct current contactor wear tracking

The present invention is notably directed to methods and systems for protecting a pre-charge circuit. The present invention is further directed to related computer-implemented program product. The method comprises monitoring the current flowing through the current limiting device, calculating the energy loading of the current limiting device over time, and managing the system state to prevent damaging operation of the pre-charge circuit.

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Jacksonville, FL, United States of America

Christopher Thorpe