Power regulation for field instruments
First Claim
Patent Images
1. A power-regulation method for a field instrument, the method comprising:
- receiving a communication signal;
adjusting the voltage supplied to a power converter based on the current of the communication signal;
converting power of the communication signal with the power converter using the adjusted supplied voltage;
determining whether the voltage of the communication signal is appropriate; and
if the voltage of the communication signal is not appropriate, refusing to convert power of the communication signal with the power converter.
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Abstract
Effective power regulation may be achieved for a field instrument that derives power from a communication signal. In particular aspects, a system and process for power regulation include the ability to receive a communication signal and adjust the voltage supplied to a power converter based on the current of the communication signal. The system and method also include the ability to convert power of the communication signal with the power converter.
33 Citations
31 Claims
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1. A power-regulation method for a field instrument, the method comprising:
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receiving a communication signal; adjusting the voltage supplied to a power converter based on the current of the communication signal; converting power of the communication signal with the power converter using the adjusted supplied voltage; determining whether the voltage of the communication signal is appropriate; and if the voltage of the communication signal is not appropriate, refusing to convert power of the communication signal with the power converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A field instrument comprising:
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a communication interface operable to receive a communication signal; a power converter coupled to the communication interface, the power converter operable to convert power of the communication signal using a supplied voltage; an adjustable voltage regulator coupled to the power converter, the adjustable voltage regulator operable to adjust the voltage supplied to the power converter based on the current of the communication signal; and a power monitor coupled to the communication interface and the power converter, the power monitor operable to; determine whether the voltage of the communication signal is appropriate; and if the voltage of the communication signal is appropriate, allow the power converter to operate. - View Dependent Claims (12, 13, 14, 15)
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16. A field instrument comprising:
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a communication interface operable to receive a communication-loop signal; a first power converter coupled to the communication interface, the first power converter operable to convert power of the communication-loop signal; a second power converter coupled to the communication interface, the second power converter operable to convert power of the communication-loop signal; an adjustable voltage regulator coupled to the power converters, the adjustable voltage regulator operable to adjust the voltage supplied to the power converters based on the current of the communication-loop signal, the adjustment comprising; increasing the voltage if the signal current is low, and decreasing the voltage if the signal current is high; a power monitor coupled to the communication interface and the power converters, the power monitor operable to; determine whether the voltage of the communication-loop signal is appropriate, and if the voltage of the communication-loop signal is appropriate, allow the power converters to operate; and a power supply coupled to the communication interface and at least one of the power converters, the power supply operable to temporarily supply power to at least one of the power converters if the communication-loop signal is interrupted.
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17. A power-regulation method for a field instrument, the method comprising:
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receiving a communication signal; adjusting the voltage supplied to a power converter based on the current of the communication signal; converting power of the communication signal with the power converter using the adjusted supplied voltage; determining whether an interruption in the communication signal has occurred; and if an interruption in the communication signal has occurred, temporarily supplying power to the power converter. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A field instrument comprising:
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a communication interface operable to receive a communication signal; a power converter coupled to the communication interface, the power converter operable to convert power of the communication signal using a supplied voltage; an adjustable voltage regulator coupled to the power converter, the adjustable voltage regulator operable to adjust the voltage supplied to the power converter based on the current of the communication signal; and a power supply coupled to the communication interface and the power converter, the power supply operable to temporarily supply power to the power converter if the communication signal is interrupted. - View Dependent Claims (28, 29, 30, 31)
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Specification