Modeling and Analysis of Multiple Open-Switch Faults in Converters Supplying Permanent-Magnet Synchronous Machines

This paper discusses the mathematical modeling of multiple open-switch faults in two-level converters and their effects on permanent-magnet synchronous motors. A novel generic, computationally efficient converter model is introduced and applied in simulations with a traction motor from a commercially available electric vehicle. The converter model allows to evaluate the effects of different combinations of multiple open-switch faults on the electrical current of the electric machine. It is validated using comparative simulation and measurement results.