| 摘要 |
1470792 Voltage-multiplying rectifier construction SIEMENS AG 25 March 1974 [23 March 1973] 1203/74 Heading H2F In a voltage multiplier cascade comprising two rows of series-connected capacitors coupled by a series chain of diodes, each row of capacitors is formed integrally as a parent layer-type capacitor having overlapping electrodes displaced so as to form free edge zones on opposite sides, the parent capacitor being split up to form the row of series-connected capacitors by cuts made from at least one side and passing into the free edge zone on the opposite side. The series connection between adjacent capacitors is formed by an intermediate electrode. This arrangement ensures that the voltage between adjacent contact surfaces (e.g. 13 or 14, Fig. 3) is no greater than the voltage across one of said capacitors. The assembly is encased in synthetic resin. Figs. 3 and 4 show arrangements in which the rows 4 and 5 of capacitors are formed as described in Specification 1,220,567 (Division H1) in which the parent capacitors are cut from a coiled body of electrode and dielectric materials wound on a drum. Each row has dielectrics carrying coatings 15, 18 or 16, 17, the two rows being separated by an insulating layer 21. Sprayed metal layers 13, 14 connect to the free edge zones of electrodes 15 and 17 respectively. The parent capacitors are divided by saw cuts 10 into individual capacitors which form rows 4, 5. The saw cuts extend into the free zone on the opposite side. Blind electrodes 16 and 18 extend beyond the saw cuts 10 so as to form intermediate electrodes between series-connected capacitors. Silicon diodes 3 are spot welded to the edges of the sprayed metal contact surfaces 13, 14. In Fig. 2 (not shown), saw cuts are made from side 13 only and the two rows of capacitors are arranged with their sides 14 in the same plane. The invention is applicable to EHT supply in colour television. |
