A three-phase induction motor electric driver - modeling and implementation

• Fajardo Jaimes, Arturo ^[1] ; Ojeda Ruiz, Fernando ^[2] ; Hay Harb, Abdel Karim ^[1] ; Perilla Galindo, Gabriel ^[1]
  1. [1] Pontífica Universidad Javeriana

     Pontífica Universidad Javeriana

     Colombia

     
  2. [2] U y G Ingeniería S.A
• Localización: Tecnura: Tecnología y Cultura Afirmando el Conocimiento, ISSN-e 2248-7638, ISSN 0123-921X, Vol. 18, Nº. 39, 2014, págs. 94-109
• Idioma: inglés
• Títulos paralelos:
  • Modelado e implementación de un manejador eléctrico para un motor de inducción trifásico
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• Resumen
  • español

    En este articulo se presenta el diseñó e implementación de un manejador eléctrico con factor de potencia unitario de un motor de inducción trifásico controlado de forma digital mediante la técnica de control escalar. Se describe en detalle la metodología usada para obtener los modelos lineales de todo el sistema y los resultados experimentales de la implementación. El sistema implementado obtuvo factor de potencia unitario en el rango de operación (Pin <200W), regulación de velocidad menor 5% y una eficiencia de la unidad de procesamiento de potencia de 82%.

  • English

    This paper gives a detailed description of a non-conventional speed-variation linear model in­tended for a conventional three-phase induction motor. The proposed architecture consists in a single-phase unit-power-factor tap (PFC) fo­llowed by three-phase inverter, which feeds the motor by using the scalar-control technique. The whole system is digitally-controlled by a Digital Signal Processor (DSP). In order to obtain the model, non-conventional use of the average ope­rator is suggested, which involves a calculation time span that depends on the target dynamics. This type of analysis simplifies the development of lossless models in terms of model precision. The project was divided into three methodolo­gical stages. Stage one established target dyna­mics for each of the electric-driver parts as well as providing linear models by means of a well-defined stage-specific mobile average operator. Stage two served to validate the models through simulation-based experiments. Finally, contro­llers were designed and the driver was imple­mented so as to validate the design process ex­perimentally. The system that was implementing through this modeling process corresponds to a speed-variation unit for a 0,5-HP reduced-vol­tage (22V) induction motor. The implemented system was characterized in terms of the total power-factor correction, a speed regulation level lower than 5 %, and power-processing-unit effi­ciency (PFC-Inverter) of 82 %.