Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Reexamination Certificate
2008-05-20
2009-06-02
Laxton, Gary L (Department: 2838)
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
C363S098000
Reexamination Certificate
active
07542311
ABSTRACT:
A method for operating a converter circuit is specified with the converter circuit having a converter unit with a multiplicity of controllable power semiconductor switches and having an energy storage circuit formed by two series-connected capacitors, in which the controllable power semiconductor switches are controlled by means of a control signal formed from a hysteresis signal vector (x), and the hysteresis signal vector (x) is formed from a difference-phase connection current vector (Δifi,i) by means of a hysteresis regulator, and the difference-phase connection current vector (Δifi,i) is formed from the subtraction of a phase connection current vector (ifi,i) from a reference phase connection current vector (ifi,i,ref), with the reference phase connection current vector (ifi,i,ref) being formed from a difference power value (Pdiff), a difference wattless-component value (Qdiff) and a phase flux vector (ψg,αβ). In order to very largely stabilize the switching frequency of the controllable power semiconductor switches, a current correction value (i0) is additionally subtracted in order to form the difference-phase connection current vector (Δifi,i), with the current correction value (i0) being formed by integration of a phase connection voltage mean value (uinv,A), and the phase connection voltage mean value (uinv,A) being formed by determining the arithmetic mean value of the phase connection voltages (uinv,iM) with the reference point of the connection point of the capacitors in the energy storage circuit. A device is also specified, by means of which the method can be carried out in a particularly simple manner.
REFERENCES:
patent: 6166928 (2000-12-01), Chandorkar
patent: 6804130 (2004-10-01), Morimoto
patent: 7310253 (2007-12-01), Fujii et al.
patent: 2006/0215425 (2006-09-01), Fu et al.
Hernandez F et al:, “A generalized control scheme for active front-end multilevel converters”, IECON'01., Proceedings of the 27th. Annual Conference of the IEEE Industrial Electronics Socienty., Denver, CO, Nov. 329-Dec. 2, 2001, Annual Conference of the IEEE Industrial Electronics Society, New York, NY, vol. 1 of 3, Conf. 27 Nov. 29, 2001, pp. 915-920.
Malinowski M et al:, “A comparative study of control techniques for PWM rectifiers in AC adjustable speed drives”, IECON'01., Proceedings of the 27th., Annual Conference of the IEEE Inudstrial Electronics Society., Denver, CO, Nov. 29-Dec. 2, 2001, Annual Conference of the IEEE Industrial Electronics Society, New York, NY, vol. 1 of 3, pp. 1114-1118.
Liserre M et al:, “Stability improvements of an LCL-filter based three-phase active rectifier”, 33rd. Annual IEEE Power Electronics Specialists Conference. PESC 2002 Conference Proceedings. Cairns, Queensland, Australia, Jun. 23-27, 2002, Annual Power Electronics Specialist Conference, New York, vol. 2 of 4 Jun. 23, 2002, pp. 1195-1201.
Yifan Zhao et al:, “Force Commutated Three Level Boost Type Rectifier”, IEEE Transactions on Industry Applications, IEEE Service Center, Piscataway, NJ, US, Jan. 1995, vol. 31, No. 1 pp. 155-161.
International Preliminary Report on Patentability PCT/IB/373.
Notification Concerning Transmittal of International Preliminary Report on Patentability PCT/IB/326.
Kolar Johann Walter
Round Simon Douglas
Serpa Leonardo
ABB (Schweiz) AG
Buchanan & Ingersoll & Rooney PC
Laxton Gary L
LandOfFree
Method for operating a converter circuit, and device for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for operating a converter circuit, and device for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for operating a converter circuit, and device for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4146842