A common method for cooling large converters is active water cooling. This involves first cooling the electrolytic capacitors in the DC link and then the power semiconductors. Due to their design, the thermal conductivity of electrolytic capacitors in the axial direction is several times greater than in the radial direction, as the anode and cathode foils are very good at transporting the heat loss generated during operation towards the can bottom.
The heat transfer from the electrolytic capacitor winding to the can bottom can be improved by a protruding cathode winding, the so-called “extended cathode.” The thermal resistance between the can bottom and the heat sink can be reduced by using thermal conductive films or thermal conductive adhesives and sufficient contact pressure. In order to press the electrolytic capacitor securely and with sufficient force against the heat sink, it is advantageous to form a notch and a circumferential metal ring just above the can bottom at the factory.
Jianghai offers these customer-specific variants of screw terminal electrolytic capacitors within the limits of what is technically feasible for customers with high performance requirements for the DC link and the option of active heat dissipation through water cooling.
Customized electrolytic capacitors from Jianghai combine technical solutions tailored to the respective application with good cost efficiency and are available for orders starting at the minimum order quantity listed in the catalog – please feel free to contact us for more information.
If you have any questions, please do not hesitate to contact us:
Dr. Arne Albertsen
Tel.: 0049 / 2151 / 652088-22
Email