TDK Corporation presents the EPCOS RingCap – a power capacitor with an innovative design that is especially suitable for xEV applications. Thanks to its ring configuration, the new RingCap can be integrated into a clutch bell housing or wheel hub motors. 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. The EPCOS RingCap is designed for rated voltages of between 100-Vdc and 900-Vdc and offers capacitance values of between 100 µF and 2000 µF.
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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 and +105 degrees C. With a dielectric made of polyethylene naphthalate (PEN), it can even handle temperatures of up to +150 degrees C.
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