Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate
2006-01-05
2008-03-04
Berhane, Adolf (Department: 2838)
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
Reexamination Certificate
active
07339808
ABSTRACT:
The dc to ac power generator has a DC power source which is connected at one pole to the primary of a conventional voltage transformer, and at its other pole to a relay controlled switching system. A mechanical switch of the relay is connected to the opposite pole of the transformer primary and it also responds to the presence of voltage on the secondary windings of the transformer, i.e., when the relay is energized. Due to inherent time delays introduced by a combination of the transformer circuitry and the relay energizing circuitry, the relay switching system functions at precise and equal time intervals to reverse polarity of the DC power source with respect to the coils of the transformer, such that output power signals provided at the secondary of the transformer define a precise square wave configuration with waves of equal time duration and approximately equal and opposite magnitudes.
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http://theepicenter.com/dc—to—ac—power—converters—and—interters.html retrieved: Feb. 2005.
Car-Adapter-165 165 Watt Car Adapter Inverter, Laptops for Less, http://store.1-f-1.com/cgi-bin/cp-app.cgi?pg=prod&ref=CAR-ADAPTER-165 retrieved: Feb. 2005.
Berhane Adolf
Litman Richard C.
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