Tag Archive: how corona treatment works

Principle of the MultiDyne: Gliding Arc Discharge

The MultiDyne system operates using the gliding arc discharge principle.  The electrode arrangement is the key to this type of discharge.  As shown in the diagram, the arc forms at the closest distance between the electrodes.  The electrodes are curved to allow the arc to travel between them while increasing in size.  The arc however does not travel along the electrodes without the assistance of airflow behind it.  The airflow is carefully set to maximize the size of the discharge without prematurely extinguishing the arc.

The other major component to maximizing the gliding arc discharge is the specialized high voltage transformer.  The transformer is a dry, oil free, transformer capable of providing over ten thousand volts.  The transformer also offers safety features.  The first of the safety features is the ability for the transformer to current limit itself in the event of a short circuit.  The other safety feature is a center tap connected to ground, reducing the potential between the high voltage leads and ground to 50%.

Application

Utilizing the MultiDyne, 3DT has been a solution for numerous industries.  Without the need for a separate ground plate, the MultiDyne is easily incorporated into existing or new product lines.  Adjusting the gap, along with product speed, allows for adjustability of the intensity and size of the discharge on the product.  This allows for most products, regardless of material sensitivity, to be treated.  The size of the arc discharge allows for treatment of three-dimensional objects in addition to flat linear applications.

The diagram below shows how adjusting the gap alters the width of the discharge.

The MultiDyne system may be designed around a basic principle, but 3DT has developed it into a solid, reliable surface treatment system. Contact our sales team for more information and to discuss your application at 262-253-6700 or sales@3DTLLC.com.

3DT’s MultiDyne 1000 with 1 treating head. Systems are available with 1-4 treating heads depending on the application. Learn more about MultiDyne on our MultiDyne page.

References:

Bruggeman, Peter J. “2.6.3 Gliding Arc Discharge.” Low Temperature Plasma Technology: Methods and Applications, edited by Paul K. Chu and Xinpei Lu, CRC Press, 2014, pp. 27–28.