Sensorless vector control and instability phenomena of induction motors

• Autorzy: Ottersten R. , Harnefors L.

Warianty tytułu

PL

Bezczujnikowe sterowanie i stabilność silników indukcyjnych

• Języki publikacji: EN

Abstrakty

EN

The back electromotive force is used as the basis for sensorless control in this paper. A variant of the classical "voltage model" is adopted for sensorless flux estimation. It is shown that the estimator must be redesigned for the purpose of arbitrarily placement of the closed-loop poles. A stability analysis of the redesigned estimator shows that asymptotical stability can be guaranteed at nominal speeds. At very low frequencies, on the other hand, experimental results show that stability is largely affected by the knowledge of the stator resistance.

PL

W artykule przedstawiono koncepcje sterowania bezczujnikowego prędkości kątowej silnika indukcyjnego na bazie estymacji siły elektromagnetycznej obliczanej z modelu napięciowego strumienia. Wykazano, że ze względu na stabilność estymator musi być zmodyfikowany i zapewnia stabilność asymptotyczną dla prędkości znamionowej. W zakresie dolnych prędkości stabilność systemu zależy silnie od znajomości rezystancji stojana.

Słowa kluczowe

EN

induction motor; stability; flux estimation

PL

silnik indukcyjny; stabilność; estymator strumienia; bezczujnikowe sterowanie prędkością

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2004
• Tom: R. 80, nr 5
• Strony: 476--483
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Ottersten R.

• Department of Electric Power Engineering, Chalmers University of Technology, SE-412 96 Goteborg, Sweden

autor

Harnefors L.

• Department of Electric Power Engineering, Chalmers University of Technology, SE-412 96 Goteborg, Sweden

Bibliografia

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