Operating a three phase device using single phase power

Details Operating a three phase device using single phase power Operating a three phase device using single phase power

2004-08-19

2009-10-27

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

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

C187S296000, C318S768000

Reexamination Certificate

active

07609534

ABSTRACT:
A powering arrangement (32, 34) for a device (30, 22) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltage across the leads coupled with the single phase power supply. The quadrature component is estimated based upon a numerical derivative of the direct component. The direct component is also provided to a current regulator in a feed forward control manner, which minimizes error.

REFERENCES:
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patent: 5824990 (1998-10-01), Geissler et al.
patent: 5850132 (1998-12-01), Garces
patent: 6058028 (2000-05-01), Czerwinski
patent: 6636012 (2003-10-01), Royak et al.
patent: 6697268 (2004-02-01), Tomonaga
PCT International Search Report and Written Opinion of the International Searching Authority dated Sep. 26, 2007 for International application No. PCT/US04/26974.
International Preliminary Report on Patentability for International application No. PCT/US2004/026974 mailed Nov. 1, 2007.

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