Measurement of the current of a frequency converter

Details Measurement of the current of a frequency converter Measurement of the current of a frequency converter

2007-06-01

2010-06-22

Sterrett, Jeffrey L (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S097000

Reexamination Certificate

active

07742321

ABSTRACT:
A method and an apparatus for measuring the output currents of a frequency converter, preferably a vector-controlled frequency converter, which comprises a mains bridge (10) connectable to an alternating-current network and a load bridge (11) connectable to an alternating-current load and between these a direct-voltage intermediate circuit, by using current samples obtained from a current measuring sensor in the intermediate voltage circuit, wherein a sample is taken from the signal of the current measuring sensor substantially simultaneously with a point of change of the output voltage vector and upon the lapse of a predetermined delay after the point of change after the switching effects have settled.

REFERENCES:
patent: 4520298 (1985-05-01), Abbondanti
patent: 5367240 (1994-11-01), Schroder-Brumloop et al.
patent: 6049474 (2000-04-01), Platnic
patent: 116337 (2005-06-01), None
“Calculate.” Random House Unabridged Dictionary. (C) 1997 by Random House, Inc., on Infoplease. (C) 2000-2009 Pearson Education, publishing as Infoplease. Accessed Oct. 27, 2009 <http://dictionary.infoplease.com/calculate>.
IEEE, Transactions on Industry Applications, vol. 33, No./ 5, Sep./Oct. 1997; Frede Blaabjert et al.; “Single Current Sensor Technique in the DC Link of Three-Phase-VS Inverters: A Review and a Novel Solution”.
The European Power Electronics Association. 1993, pp. 415-421, J.F. Moynihan, et al., “Single Sensor Current Control of AC Servodrives Using Digital Signal Processors”.
University of L′Aquila Department of Electrical Engineering. pp. 1284-1289, Francesco Parasiliti, et al., “Low Cost Phase Current Sensing in DSP Based AC Drives”.
IEEE Transations on Power Electronics, vol. 17, No. 6, Nov. 2002, Dong-Choon Lee, et al., “AC Voltage and Current Sensorless Control of Three-Phase PWM Rectifiers”.
IEEE 1999 International Conference on Power Electronics and Drive Systems, REDS'99, Jul. 1999, Hong Kong, B. Anderson et al., “Active Three-phase Rectifier with only One Current Sensor in the dc-link”.

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