Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Reexamination Certificate
2005-11-22
2005-11-22
Vu, Bao Q. (Department: 2838)
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
C318S563000, C318S650000, C318S806000
Reexamination Certificate
active
06967454
ABSTRACT:
An apparatus monitors performance of a power inverter to detect malfunctions. A first signal indicates the direction that electric current exists between a first voltage bus and an output terminal of the power inverter. A second signal indicates the direction that electric current exists between a second voltage bus and the output terminal. A third signal indicates the direction that electric current occurs between the output terminal and a load. Other signals designate a commanded conductivity of switches that control the current within the power inverter. A controller analyzes the values of those signals to determine whether a malfunction has occurred.
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Quarles & Brady LLP
Rockwell Automation Technologies Inc.
Vu Bao Q.
Walbrun William R.
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