Method for open-loop and closed-loop control of an electrical dr

Details Method for open-loop and closed-loop control of an electrical dr Method for open-loop and closed-loop control of an electrical dr

1999-09-21

2000-12-26

Wong, Peter S.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

363 34, 363 41, 363 98, H02M 540, H02M 112, H02M 744

Patent

active

061669288

ABSTRACT:
In a method for open-loop and closed-loop control of an electrical drive, which comprises an asynchronous motor (18) which is supplied by a DC-AC invertor (14) with a downstream sine-wave output filter (15) with an AC voltage at a predetermined circular frequency (.omega.), stable operation with a good control response and reliable damping of natural filter oscillations is achieved in that the voltage at the output of the sine-wave output filter (15) is measured, in that the measured filter voltage is assigned a complex filter voltage vector (E) in a complex reference system rotating at the circular frequency (.omega.), and in that the DC-AC invertor (14) is actuated in such a manner that the complex filter voltage vector (E) corresponds to a predetermined required voltage vector (E*).

REFERENCES:
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Von S.N. Kalaschnikow, "Regelung des netzseitigen Pulsstromrichters eines Vier-Quadranten-Spannungszwischenkreis-Umrichters", 1994, pp. 102-111.
Translation of the explanations ("Erklarungen") of enclosure 2 ("Anlage 2") of the search report of the German Patent Office ("Deutsches Patentamt") explaining the symbol letters stating the relevance of the cited references.
German Search Report.

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