Operating electrical machines from a DC link

Electricity: motive power systems – Battery-fed motor systems

Reexamination Certificate

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Details

C318S140000

Reexamination Certificate

active

07888896

ABSTRACT:
A drive system has a number of electrical machines. One machine operates as a generator supplying an output to a DC link, which in turn supplies one or more machines operating as motors to drive loads. The motors are supplied through power converters. The total capacitance of the DC link is minimized and the link kept in a stable condition by preventing it falling to a hazardous level. One embodiment prevents the phase currents adding in such a manner as to reduce the DC link voltage. Another embodiment employs freewheeling in the phase currents to prevent the DC link voltage falling below a predetermined threshold.

REFERENCES:
patent: 4263535 (1981-04-01), Jones
patent: 5012177 (1991-04-01), Dhyanchand et al.
patent: 5568073 (1996-10-01), McClure
patent: 5850133 (1998-12-01), Heglund
patent: 5936386 (1999-08-01), Heglund
patent: 6333620 (2001-12-01), Schmitz et al.
patent: 6661206 (2003-12-01), Gallegos-Lopez
patent: 7164253 (2007-01-01), Sato et al.
patent: 2004/0027105 (2004-02-01), Nakamura et al.
patent: 2004/0135437 (2004-07-01), Mohr et al.
patent: 2005/0105897 (2005-05-01), Wu et al.
patent: 2005/0263331 (2005-12-01), Sopko et al.
patent: 32 23 786 (1983-12-01), None
patent: 0 752 753 (1997-01-01), None
patent: 0 982 194 (2000-03-01), None
patent: WO 2006/098703 (2006-09-01), None
Miller, TJE, “Electronic Control of Switched Reluctance Machines,” Newnes, Power Engineering Series, Great Britain, 2001, 2 title pages and pp. 92-97.
Stephenson, et al., “The Characteristics, Design and Applications of Switched Reluctance Motors and Drives,” PCIM '93 Conference & Exhibition, Nürnberg, Germany, Jun. 21-24, 1993, Title page and pp. 1-31 and 33-68.
Radun, et al., “Generating With the Switched Reluctance Motor,” IEEE, 1994, pp. 41-47.
Partial European Search Report mailed Dec. 21, 2007 by the European Patent Office in European Patent Applicatoni No. 07253759.0-2207, 5 pages.
Extended European Search Report mailed Feb. 18, 2008 by the European Patent Office in European Patent Application No. 07253759.0-2207, 11 pages.

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