Electrical transmission or interconnection systems – Plural supply circuits or sources – Plural converters
Reexamination Certificate
2006-08-21
2008-09-16
Sherry, Michael J (Department: 2836)
Electrical transmission or interconnection systems
Plural supply circuits or sources
Plural converters
Reexamination Certificate
active
07425779
ABSTRACT:
A power redundant power system and a method for controlling the power system are presented, wherein the power system is composed of at least one inverter for supplying AC power to a load through a bus, a phase lock system to synchronize all output voltages of the inverters and a current sharing circuit to properly distribute the load current among all inverters. Each inverter is controlled by an unbalanced power to limit the increase of its cross current. Moreover, the information related to DC bus voltage is further applied to control the inverters, whereby the cross current is mitigated and entire power system is operated steadily.
REFERENCES:
patent: 5257180 (1993-10-01), Sashida et al.
patent: 5712540 (1998-01-01), Toda et al.
Luo Han-Sheng
Tian Shou-Long
Tsai Chia-Ming
Cooper & Dunham LLP
Parries Dru M
Pelton, Esq. William E.
Phoenixtec Power Co. Ltd.
Sherry Michael J
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