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Classical Dependability Analysis techniques, such as Failure Mode and Effects Analysis (FMEA) and Fault Tree Analysis, have been used during the last decades to demonstrate the reliability, availability, maintainability and safety of industrial equipment. One of the main challenges that these techniques have to overcome is the complexity of current systems, in which more than one engineering domain...
This article presents the design and the implementation of a fault detection and isolation strategy for sensors in variable speed drives. Electric drives use several current and voltage sensors for control and protection. The principal objective of the strategy is to detect faults in DC-Link sensors, since the conclusion of a preliminary study showed that in some applications many functionalities...
This paper proposes an automatic detection test of gain faults in current sensors. An offline test is applied when the machine is not operating. The designed test operates at standstill without being necessary to disconnect the machine from the application. Current sensors are part of a commercial induction motor drive composed by a bilevel inverter, an induction motor and an electronic control unit...
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