Inverter apparatus having two control modes and apparatus using

Details Inverter apparatus having two control modes and apparatus using Inverter apparatus having two control modes and apparatus using

1993-04-01

1996-02-06

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

318801, H02M 742, H02M 774

Patent

active

054900565

ABSTRACT:
An inverter apparatus and a transport system using the same comprises a pair of current detectors for detecting output currents of at least two phases of output currents of three phases, a pair of converters for converting detected currents to two axes extending perpendicularly to each other, which are rotated in synchronism with output frequency of the inverter apparatus by an orthogonal projection, a computer for adding frequency correcting set frequency with respect to output voltage and the set frequency set from the outside, in accordance with current converted to the two axes, and for deciding predetermined output voltage and output frequency by the set frequency regardless of the current, and a switch in which ON/OFF can be assigned from the outside.

REFERENCES:
Klautschek, Weberskirch, "Vektorregelung auch ohne Drehzahlistwertgeber", 1991, pp. 14, 15.
Klautschek, Speth, Simovert-P-Umrichter fur Drehstromantriebe von 30 bis 900 kw, May 1989, pp. 34-38.

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