Power capacitor addresses e-mobility

Power capacitor addresses e-mobility

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By eeNews Europe

The Epcos RingCap is designed for rated voltages of between 100 V DC and 900 V DC and offers capacitance values of between 100 µF and 2000 µF. Apart from the main winding, Y-capacitors with separate terminals can additionally be integrated in the winding. A special heat-treatment under vacuum increases long-term stability of the capacitor. In the standard version with dielectric made of polypropylene (PP) or polyethylene terephthalate (PET), the capacitor is suitable for a temperature range between -40 °C and +105 °C. With a dielectric made of polyethylene naphthalate (PEN), it can even handle temperatures of up to +150 °C.

Due to the low equivalent series inductance (ESL) values ranging from less than 10 nH up to 30 nH, no unwanted overvoltages occur in the DC link circuit during high-speed switching operations. For better protection against environmental effects, the capacitor is also available with a resin-filled housing.

The dimensions of the capacitor can be adapted according to the specific requirements of the customer: The outer diameter may be up to 315 mm, while its width is no more than 50 mm.

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