Active Common-Mode Voltage-Based Open-Switch Fault Diagnosis of Inverters in IM-Drive Systems

Research on Fault Diagnosis of Six-Phase Propulsion Motor Drive Inverter for Marine Electric Propulsion System Based on Res-BiLSTM

“…C. Chen et al [9] analyzed the voltage waveform under normal operating conditions, established a hybrid logic dynamic model of the inverter, designed a voltage expansion observer, and determined the faulty device according to the residual error between the observed voltage and the actual voltage. Y. Cheng et al [10] obtained the expected voltage through a mixed logic dynamic model, estimated the voltage through the measured current, and used the average voltage deviation of each switching cycle as a fault location variable for fault diagnosis. However, such methods require system control signals as model input, and the diagnostic effect is related to the accuracy of the model built.…”

Open‐switch fault diagnosis in voltage source inverters of PMSM drives using predictive current errors and fuzzy logic approach

“…The fault diagnosis process is generally achieved through residual generation. Some contributions have proposed observers to estimate motor or grid currents [4][5][6][7][8][9] whereas others have been dedicated to estimate converter's output voltages [10][11][12][13][14][15][16][17][18]. For current-based algorithms, a residual is generated by comparing the measured current with the observed current.…”

“…In case of voltage-based approaches, and in order to avoid the use of additional sensors, the residual results from the comparison of the estimated voltage with the reference voltage obtained from the feedback control. Generally, state estimators are employed [10][11][12][13][14][15][16], but PI and model reference adaptive system (MRAS) observers have been also proposed in [17] and [18], respectively.…”

“…Model-based and signal-based methods are also subdivided into voltage-based or current-based algorithms. Modelbased open-circuit fault diagnosis algorithms require the use of observers [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The fault diagnosis process is generally achieved through residual generation.…”

Contribución al desarrollo de convertidores multinivel de alta tensión tolerantes a fallos

“…Se han analizado diferentes trabajos en los que se plantean nuevas topologías redundantes de convertidores de potencia como el descrito en [69] y métodos alternativos a los existentes de detección de fallos como el propuesto en [70] mediante la inyección de tensiones de modo común de manera artificial en la etapa de potencia. Otros métodos [71], proponen continuar utilizando parte de las unidades en fallo para que el convertidor pueda seguir trabajando; estos métodos, aunque en teoría funcionan, en la práctica son difíciles de llevar a cabo pues cuando se produce un fallo en una celda, queda completamente inutilizada, no sólo por los componentes que quedan dañados sino porque los daños colaterales suelen ser tan grandes que no es viable la utilización de las celdas dañadas.…”