Electrostatic coating system

Details Electrostatic coating system Electrostatic coating system

1996-03-26

1998-04-07

Czaja, Donald E.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

Electrostatic and/or electromagnetic attraction or...

361225, 361228, B05B 5025, H05B 100

Patent

active

057359580

ABSTRACT:
Electrostatic spray coating system which accurately determines the actual value of a high voltage present on at least one high voltage electrode as coating material is electrostatically charge. A control or input voltage is measured on the input of a voltage transformer and multiplier circuit and is multiplied by the voltage multiplication factor of the voltage transformer and multiplier circuit, thereby calculating the theoretical or no load value of the voltage on the high voltage electrode. This theoretical value deviates from the actual value of the electrode voltage by the amount of the internal voltage drop across the voltage transformer and multiplier circuit when a current flows in it. The internal voltage drop is determined as a function of the electrode current and is subtracted from the theoretical value in order to generate a signal voltage corresponding to the actual value of the electrode high voltage. The signal voltage is subtracted from a desired value voltage in order to generate a regulating differential voltage for a controller which, in response thereto, regulates the electrode voltage and available power.

REFERENCES:
patent: 4000443 (1976-12-01), Lever

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