Charging system for field devices
First Claim
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1. A charging system for a field device, the charging system comprising:
- an electrical generator disposed to generate electricity from a source of potential energy;
a charging circuit coupled to the generator and disposed to measure a voltage output of the generator;
an electrical storage device coupled to the charging circuit; and
wherein the charging circuit includes an output to provide power to the field device, and wherein the charging circuit is configured to operate in a plurality of modes based upon the voltage output of the generator.
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Abstract
A charging circuit for field devices is disclosed. The circuit has at least three modes and automatically shifts between the modes depending on voltage of the generator. In a first mode, the charging circuit provides voltage regulation. In a second mode, the charging circuit couples the generator directly to en energy storage device. In a third mode, the charging circuit decouples the generator from the storage device. A field device utilizing the charging circuit is also disclosed.
77 Citations
20 Claims
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1. A charging system for a field device, the charging system comprising:
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an electrical generator disposed to generate electricity from a source of potential energy; a charging circuit coupled to the generator and disposed to measure a voltage output of the generator; an electrical storage device coupled to the charging circuit; and wherein the charging circuit includes an output to provide power to the field device, and wherein the charging circuit is configured to operate in a plurality of modes based upon the voltage output of the generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A field device comprising:
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a transducer operably coupleable to a process; a controller coupled to the transducer; a communications module coupled to the controller and configured to provide process communications functions; an energy conversion module configured to provide electrical energy to the field device, the energy conversion module including; an electrical generator disposed to generate electricity from a source of potential energy; a charging circuit coupled to the generator and disposed to measure a voltage output of the generator; an electrical storage device coupled to the charging circuit; and wherein the charging circuit includes an output to provide power to the field device, and wherein the charging circuit is configured to operate a plurality of modes based upon the voltage output of the generator. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification