Calculation 1
As recommended by PPG,
Rectifier amperage I = (2.6 ampere hours/100 square feet) × workpiece area/minute × 60 minutes/hour 100 square inches
square feet = 9.29 m2 I = 2.6 ampere hours/9.29 m2 × 39 units/hour × 65 m2/60 minutes × 60 minutes/hour = 709.547 Ampere
Calculation method 2
When full load, the current density on the workpiece in the electrophoresis tank is 13-20 Ampere min/m2, the number of workpiece area in the electrophoresis tank in 1 minute: 39 units/hour x 65 m2/unit x 60 min = 42.25 m2 Current amperage
Combined the above calculations, the three-stage voltage Rectifiers 400 volts 1000 amps 1 (first section) 400V 800A 2 (second and third sections)
In the cathode and anode voltage applied to the equipment is the electrophoresis rectifier, the capacity is generally to be calculated with the surface area of the workpiece, in addition to electrophoresis coating mode is divided into gap and continuous, the output of the ripple system because the smaller the better, the voltage stabilization accuracy is also best in the 1% or less for good. The control system belongs to the key in the key, for the old analog control due to the existence of temperature, time drift and many other unfavorable factors have been gradually eliminated, and to replace its position has been a fully digital control system combined with a double standby control system of the new control system.
At present, the domestic Baoding rectifier technology level is relatively good, like some manufacturers can do the control board double standby, while some manufacturers can do the whole control system double standby such as Baoding Hongcheng converter, are for the coating production to do a high degree of reliability and high-performance safety assurance.