Electrocoat painting overload protection circuit and method

Details Electrocoat painting overload protection circuit and method Electrocoat painting overload protection circuit and method

1996-07-09

1998-06-02

Gorgos, Kathryn L.

Chemistry: electrical and wave energy

Processes and products

Electrophoresis or electro-osmosis processes and electrolyte...

204472, C25D 1300

Patent

active

057593710

ABSTRACT:
An overload protection and control circuit and methods for electrocoat painting systems is disclosed. A resistive shunt is utilized to generate a voltage proportional to the level of current flow to electrodes in the electrocoat painting system. After amplification, the generated voltage is compared with a reference voltage. If the current exceeds a predetermined level, indicative of an overcurrent condition, a comparator causes a control circuit to disable current flow. A timer is provided to delay re-enabling of current flow for a predetermined delay interval. The control circuit may receive inputs from a control PLC or computer. The control PLC or computer may receive inputs from sensors such as a pH sensor or a membrane monitor. The control PLC or computer may selectively control the control circuit to various electrodes so as to more appropriately operate the electrocoat painting system.

REFERENCES:
patent: 3658676 (1972-04-01), De Vittorio et al.
patent: 4452680 (1984-06-01), Jackson et al.
patent: 4851102 (1989-07-01), Inoue

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