Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Reexamination Certificate
2006-04-04
2006-04-04
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
Reexamination Certificate
active
07023163
ABSTRACT:
According to the present invention, a fail-safe circuit for controlling an actuator is provided with an input voltage which is rectified and converted to a DC voltage. The DC voltage is boosted to a high level, and high voltage storage capacitors are charged at this high voltage level resulting in smaller, less expensive capacitors. The high voltage from the storage capacitors is then converted back to a smaller DC voltage to drive the motor of the actuator. Reduced size and increased energy storage is based on the relationship between capacitance and voltage in the equation: E=½ CV2.
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Charles Donald E.
Cook Matthew D.
Ro Bentsu
Siemens Building Technologies
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