Electric power conversion systems – Current conversion – Having plural converters for single conversion
Reexamination Certificate
2008-09-23
2008-09-23
Laxton, Gary L (Department: 2838)
Electric power conversion systems
Current conversion
Having plural converters for single conversion
C363S039000
Reexamination Certificate
active
11518979
ABSTRACT:
A power delivery system, and a method for operating it includes a plurality of power cells that are electrically connected to a multi-winding machine comprising one or more primary windings and a plurality of secondary windings such that each cell is electrically connected to one of the secondary windings and a plurality of the secondary windings are phase-shifted with respect to the primary windings. The method includes determining, for each cell in a set of the power cells, a carrier offset angle, and synchronizing, by the each cell in the set, a carrier signal to the secondary voltage for the cell based on the carrier offset angle determined for the cell. The carrier signal for each cell controls the timing of operation of switching devices within the cell.
REFERENCES:
patent: 5625545 (1997-04-01), Hammond
patent: 5638263 (1997-06-01), Opal et al.
patent: 5933339 (1999-08-01), Duba et al.
patent: 6236580 (2001-05-01), Aiello et al.
patent: 6301130 (2001-10-01), Aiello et al.
patent: 6313600 (2001-11-01), Hammond et al.
patent: 6411530 (2002-06-01), Hammond et al.
patent: 6762947 (2004-07-01), Hammond
J.W. Dixon et al., “Dynamically Stabilized Indirect Current Controlled SPWM Boost Type 3-Phase Rectifier”, IEEE, 1988, pp. 700-705.
T. Kohara et al., “Carrier Phase Error Detection Method and Synchronization Control of Parallel-Connected PWM Inverters without Signal Line”, IEEJ Trans. IA, vol. 124, No. 5, 2004, pp. 450-456.
Z.H. Wang, et al., “A Novel PWM scheme to eliminate common-mode voltages in cascaded multi-level inverters”, IEEE, 2003, pp. 780-785.
Bousfield, III John Channing
Osman Richard H.
Laxton Gary L
Siemens Energy & Automation Inc.
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