Electrical transmission or interconnection systems – Shunting or short circuiting systems
Patent
1995-06-20
1996-08-27
Wong, Peter S.
Electrical transmission or interconnection systems
Shunting or short circuiting systems
323223, 323226, 323220, G05F 1613
Patent
active
055504116
ABSTRACT:
A downhole power supply system having a variable voltage surface power supply and a downhole shunt voltage regulator between which is disposed in series an energy transducing device. The shunt voltage regulator comprises a current control device which controls the amount of current shunted to the power return line between the series connected energy transducing device and the input to the voltage regulator to maintain a selected voltage at the voltage regulator. The shunt regulator senses the voltage on the power line, compares the sensed voltage to the selected voltage, and controls the shunt current control device to conduct more or less current in the event that the two voltages are not equal. As a result, changing the voltage at the remote power source will change the voltage across the transducing device and the amount of current conducted through it thus changing its output. In the case where the energy transducing device is a lamp, its intensity can be directly controlled by the voltage of the remote power source. Other voltage regulator features include over-voltage protection and reverse polarity protection.
REFERENCES:
patent: 4008418 (1977-02-01), Murphy
patent: 5260644 (1993-11-01), Curtis
Information Disclosure Statement dated Aug. 17, 1995 by Philip K. Shultz.
Information Disclosure Statement dated Aug. 8, 1995 by Donald L. Baker.
Krishnan Aditya
Westech Geophysical, Inc.
Wong Peter S.
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