This paper presents a frequency regulation system and a sensorless method for the direct estimation of the slip position of the wound-rotor induction machine connected to a DC link, performing a torque control. Since the stator is connected to the DC link through a diode bridge, it is also necessary to implement the stator frequency regulation. Connecting the DFIG to a DC link using a diode bridge on the stator brings considerable benefits, because only a dc/ac power electronic inverter is required. In this system the magnetizing current is necessarily fed by the rotor: this makes the considered sensorless method particularly appropriate, because, under mismatched parameters, it gives small estimation errors. Simulation and experimental results are presented matching and showing good performances.

Sensorless Torque Control of a DFIG connected to a DC Link

IACCHETTI, MATTEO FELICE
2013

Abstract

This paper presents a frequency regulation system and a sensorless method for the direct estimation of the slip position of the wound-rotor induction machine connected to a DC link, performing a torque control. Since the stator is connected to the DC link through a diode bridge, it is also necessary to implement the stator frequency regulation. Connecting the DFIG to a DC link using a diode bridge on the stator brings considerable benefits, because only a dc/ac power electronic inverter is required. In this system the magnetizing current is necessarily fed by the rotor: this makes the considered sensorless method particularly appropriate, because, under mismatched parameters, it gives small estimation errors. Simulation and experimental results are presented matching and showing good performances.
International Symposium on Sensorless control for Electrical Drives
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/758941
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