Due to electrically high-conductive electrolytes and optimized ESR modern aluminum electrolytic capacitors can be operated with high ripple currents. The performance increase by tailor-made components in the DC bus permits a more compact and cost-optimized design. Further increases in performance can be achieved only by an optimized thermal management. Thermo pad capacitors from EPCOS improve the heat dissipation via the can bottom by up to 45%. The application of heat conducting foils at the can bottom represents an inexpensive and effective method for reduction of outside thermal resistance. Already today, thermally optimized aluminum electrolytic capacitors from EPCOS are in use in 1-Pad-Design and 2-Pad-Designs. With banks of capacitors, the improved heat dissipation permits a reduction of components joined in parallel, and thus a noticeable cost reduction as well as a clear reduction in size.
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