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In this paper the transistor open-circuit fault diagnosis strategy based on the converter voltage estimation error in the voltage oriented controlled three-phase two-level AC/DC lineside converter was presented. In accordance with the developed method, for the converter voltage estimation, the signals of the duty cycles of the voltage modulator as well as simple calculations, that use the line-to-line...
In this paper the transistor open-circuit fault diagnostic technique that is based on the grid current prediction in the voltage oriented controlled three-phase two-level rectifier was discussed. For the current one-step prediction, the rectifier's dynamics equation was discretized using the Euler's method. The proposed technique allows to detect single and multiple transistor faults under the rectifying...
this paper addresses a single-switch IGBT open-circuit faults diagnosis of a two-level voltage source inverter in an induction motor drive system with the direct torque control (DTC) strategy. The proposed diagnostic algorithm consists in the analysis of a stator flux vector amplitude and its position in a stationary reference frame. In accordance with this method the inverter fault is detected when...
This paper deals with an open-circuit IGBTs faults diagnostic method that is dedicated for three-phase two-level voltage inverter fed vector controlled induction motor drive systems. The presented technique is based on a transient analysis of a reference voltage space vector in a stationary reference frame and it does not require an extra sensors application. The diagnostic algorithm ensures to detect...
The paper deals with a transistor open-circuit faults diagnosis in a rotor field oriented controlled induction motor drive fed by a two-level voltage inverter. The diagnostic procedure ensures to detect and localize single power switch failures as well as single-phase transistor faults in a time shorter than one period of a stator current fundamental harmonic, without regard to a drive operation point...
In this paper a new simple diagnostic technique of single IGBT open-circuit faults for a two level voltage inverter-fed field oriented controlled induction motor drive is presented. A failure diagnosis is carried out utilizing a reference voltage vector analysis in stationary coordinates, without additional sensors. An extraction of fault information is based on monitoring the voltage vector time...
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