Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1992-03-26
1994-01-18
Stephan, Steven L.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363160, 318811, H02M 7525, H02P 540
Patent
active
052804194
ABSTRACT:
A method and a switching arrangement are provided for regulating a two-dimensional vector of a controlled system with a discrete value final controlling element having a limited switching frequency. The discrete value final controlling element also has limited number of actual-value vectors. A switching arrangement, such as a microprocessor, receives actual values for the two-dimensional vector as well as a reference vector and selects three actual-value vectors that are adjacent to the reference vector. The switching arrangement generates a reference trajectory which represents a sequence of vector settings for the discrete value final controlling element. A switch from one actual-value vector to another takes place when the distance between the two-dimensional vector and a next corner point of the reference trajectory is at a minimum. The resulting mean value of the generated two-dimensional vector is equal to the reference vector.
REFERENCES:
patent: 4159513 (1979-06-01), Gemp et al.
patent: 4488215 (1984-12-01), Pfaff et al.
patent: 4978894 (1990-12-01), Takahara
patent: 5182701 (1993-01-01), Mochikawa et al.
Davidson Ben
Siemens Aktiengesellschaft
Stephan Steven L.
LandOfFree
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