Anode and cathode current monitoring
AssigneeUniversal Dynamics Technologies Inc.
InventorOliver K. Hung
Life of this patent
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Abstract
The present invention provides a method and apparatus for determining the current densities in an alumina reduction cell by the measuring of magnetic fields without contact with the anodes or cathodes. The current density is modelled by determining the currents in the anodes and/or cathodes by measuring the magnetic field produced by the anodes or cathodes, or the conductors feeding them, and electronically correcting for ambient effects. The apparatus consists of Hall Effect devices to measure the magnetic field and electronics to correct, display, log and analyze the data.
Claims19
A method of determining the current distribution in one or more alumina reduction cells by i) providing one or more sensors adapted to measure the magnetic field in the vicinity of each of one or more conductors carrying electrical power to or from the cell and to generate one or more signals proportional to said magnetic fields;
- (ii) communicating said signals to a remote control device;
- iii) compensating said signals for ambient magnetic effects and temperature either before or after said communication step;
- and iv) generating control signals to said reduction cell based on said signals.
A method of determining the current distribution in one or more alumina reduction cells by i) providing one or more sensors adapted to measure the magnetic field in the vicinity of each of a one or more conductors carrying electrical power to or from the cell and generating one or more signals proportional to said magnetic fields;
- (ii) communicating said signals to a remote control device;
- iii) compensating said signals for ambient magnetic effects and temperature either before or after said communication step;
- and iv) continuously displaying an image representative of the values of said one or more signals.
Dependencies are inferred from the claim text.