Speed Estimation of DFIM by Using Frequency Analysis of Stator Current

Conference: PCIM Europe 2014 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/20/2014 - 05/22/2014 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2014

Pages: 6Language: englishTyp: PDF

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Fang, J.; Staudt, V.; Steimel, A. (Ruhr-University Bochum, Germany)

Speed-sensorless operation of machines eliminates the need for a sensor, reducing cost and enhancing reliability. For speed identification schemes based on linear models of the machine various concepts are known. In case of doubly-fed induction machines challenges result from the slotting of the stator as well as of the rotor, leading to harmonics of the respective currents at quasi-sinusoidal voltages. Including slotting and the resulting current harmonics into the model allows for speed identification.