2014/04/09 by Mohamed Salah, Khmais Bacha, Abdelkader Châari +1 · 79 citations
Engineering · Energy · #Engineering and Technology Innovations #Photovoltaic System Optimization Techniques #Magnetic Bearings and Levitation Dynamics #Diode #Fault (geology) #Generator (circuit theory) #Voltage #Permanent magnet synchronous generator #Excitation #Three-phase #PIN diode #Electronic circuit #Control theory (sociology) #Computer science #Engineering #Electronic engineering #Electrical engineering #Physics #Power (physics) #Control (management)
paper · doi:10.1109/tec.2014.2312173
published in IEEE Transactions on Energy Conversion 29(3), 594-601 (Institute of Electrical and Electronics Engineers)
openalex publication_date 2014/04/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/08
In brushless excitation systems, the rotating diodes can experience open- or short-circuits. For a three-phase synchronous generator under no-load, we present theoretical development of effects of diode failures on machine output voltage. Thereby, we expect the spectral response faced with each fault condition, and we propose an original algorithm for state monitoring of rotating diodes. Moreover, given experimental observations of the spectral behavior of stray flux, we propose an alternative technique. Laboratory tests have proven the effectiveness of the proposed methods for detection of fault diodes, even when the generator has been fully loaded. However, their ability to distinguish between cases of diodes interrupted and short-circuited, has been limited to the no-load condition, and certain loads of specific natures.