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1. Special features of these capacitors
1.1 General information. Equivalent diagram
Capacitors used in electronics to raise the power factor, start single-phase induction motors, etc., meet the following conditions of use:
quasi-sinusoidal operation at industrial frequencies (50 or 60 Hz);
no significant DC voltage at their terminals.
Finally, their series residual inductance is not specified; its value can be quite high without any significant consequences in the above-mentioned applications.
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Such conditions are quite the opposite of those offered to capacitors used in power electronics circuits. In these circuits :
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Special features of these capacitors
Technologies used
Bibliography
- YASUFUKU (S.), UMEMURA (T.), YASUDA (Y.) - Dielectric properties of oil impregnated all polypropylene film, power capacitor insulation system (Propriétés diélectriques du film tout polypropylène imprégné d'huile pour l'isolation des condensateurs de puissance) - . IEEE Trans. on Electrical Insulation (USA). Déc. 1978, p. 403-10. ...
Main manufacturers
(non-exhaustive list)
AVX TPC: film and ceramic capacitors http://www.avxcorp.com
HITACHI AIC: electrolytic capacitors http://www.hitachiaic.com
EPCOS: film capacitors, electrolytic capacitors, double layer...
Standardization
International Electrotechnical Commission (IEC)
- Power capacitors for induction heat generation systems – Part 1: General information. - CEI 60110-1 - 1998
- Power capacitors for induction heat generation systems – Part 2: Ageing test, destruction test and disconnection test requirements for internal fuses. - CEI 60110-2...
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