Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1996-04-16
1997-05-20
Hecker, Stuart N.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 41, 318811, H02M 7537, H02M 7538
Patent
active
056318197
ABSTRACT:
The invention provides an electric power converter system which uses a standard low-priced control processor and is suitable for improving the voltage utilization factor in the output voltage. D-axis and q-axis voltage commands and a rotation angle .theta. defining a voltage command vector on a rotating coordinate system are input to a voltage calculation circuit. The voltage command vector is transformed in a rotating coordinate transformation unit into a .alpha. axis and .beta. axis voltage commands to be defined relative to stationary coordinate system. A judgment unit determines which section contains the voltage command vector, from among three sections on the stationary coordinate system having one axis thereof (.alpha.-axis for example) coinciding with one axis of the three phases. A three phase voltage generation unit then selects a method of calculation on the basis of a result of the section determination, and calculates three phase voltage command values respectively utilizing the .alpha. axis and .beta. axis voltage command values. Since calculation requires only a simple add/subtract and shift operation, a high performance economical power converter system which improves the voltage utilization factor substantially can be realized.
REFERENCES:
patent: 3603867 (1971-09-01), Cuenoud
patent: 4321663 (1982-03-01), Krtek
patent: 4480301 (1984-10-01), Pfaff et al.
patent: 5023538 (1991-06-01), Mutoh et al.
patent: 5436819 (1995-07-01), Mikami et al.
patent: 5550450 (1996-08-01), Palko et al.
Ikimi Takashi
Ishida Seiji
Masaki Ryoso
Obara Sanshiro
Ohashi Hironori
Hecker Stuart N.
Hitachi , Ltd.
LandOfFree
Power converter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power converter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1728580