Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 362
ne. If the bus-bar voltage rises above its normal value,the time during which the contact k is closed is decreased and the conditionsmay be represented by the lower zigzag line. Although it has no direct effect on the strength of the exciting current,it is interesting to note that the frequency of… … Fig- 352 current. The following example may be taken as typical of most of thesedevices. The main current, on leaving the alternator, passes through theprimary windings of a transformer, the secondary windings of which areconnected to brushes rubbing on slip-rings fitted to the exciting dynamowhich…
Electrical engineering
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