Operation of Permanent Magnet Synchronous Motor after Open-circuit Battery Supply Fault

Vanja Ambrožič, Mitja Breznik, Mitja Nemec


This paper presents a method for post-fault operation with reduced performance of a permanent magnet synchronous motor following a battery supply open circuit fault. The approach upgrades the previously developed fast model-oriented supply fault detection algorithm based on comparing actual and estimated values of a DC-link voltage. The latter is determined by the model of supply circuit and observer of battery open-circuit voltage. Implementing a post-fault concept does not require additional hardware, as it uses quantities from an already existent vector control algorithm. After the fault is detected, the algorithm is upgraded by a DC-link voltage cascade control loop.  An analytical approach to parametrization of the controller, based on the linearization and the reduction of the system's transfer function, is also proposed. Simulations and experimental results have validated the performance of the post-fault algorithm.


power supply fault; model-based detection algorithm; control loop parametrization; DC-link voltage regulator; fault-tolerant design

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DOI: https://doi.org/10.33180/InfMIDEM2022.103


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