POSITIONER
First Claim
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1. A positioner comprising:
- an air circuit comprising a magnetism generator configured to generate magnetism based on an electric current in accordance with a difference between a valve opening setpoint for a regulator valve that is to be controlled and a measured valve opening value for the regulator valve,a pneumatic signal configured to adjust air pressure is generated based on the magnetism produced by the magnetism generator and supplied to an operating device of the regulator valve,wherein the magnetism generator comprises a plurality of coils that are connected in parallel electrically and that are additively coupled magnetically.
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Abstract
The positioner having an air circuit including magnetism generating portions producing magnetism based on a current in accordance with a difference between a valve opening setpoint of a regulator valve and a measured value for the valve opening, to generate a pneumatic signal wherein the air pressure is adjusted based on the magnetism produced by the magnetism generating portions, where this pneumatic signal is supplied to an operating device of the regulator valve, where the magnetism generating portions are connected in parallel, and including a plurality of coils connected through magnetically additive coupling.
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4 Claims
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1. A positioner comprising:
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an air circuit comprising a magnetism generator configured to generate magnetism based on an electric current in accordance with a difference between a valve opening setpoint for a regulator valve that is to be controlled and a measured valve opening value for the regulator valve, a pneumatic signal configured to adjust air pressure is generated based on the magnetism produced by the magnetism generator and supplied to an operating device of the regulator valve, wherein the magnetism generator comprises a plurality of coils that are connected in parallel electrically and that are additively coupled magnetically. - View Dependent Claims (2, 3, 4)
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Specification