| 摘要 |
1430539 Electrolytic capacitors SIEMENS AG 1 Oct 1974 [5 Dec 1973] 42471/74 Heading HIM In the manufacture of electrolytic capacitors, a secondary formation is carried out by subjecting the capacitors individually to the action of a constant current of magnitude such that the secondary formation voltage, of value between the working voltage and the primary formation voltage, is reached in at most 10 seconds. The capacitor may comprise anode foil strips cut from an anodized sheet of valve metal, e.g. aluminium, wound into a roll with cathode foil and a paper separator impregnated with electrolyte. The constant current is obtained by regulating the current from a stabilized voltage source. Secondary formation may be carried out before or after the rod is placed in a housing but prior to sealing. The capacitors may be aged at, e.g., 85‹ C. for 0À5 to 2 hours by applying a voltage between the working voltage and the secondary formation voltage. |
