Die Methode der graphischen Darstellung und ihre Anwendung by Dipl.-Ingenieur O. Herold (auth.)

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By Dipl.-Ingenieur O. Herold (auth.)

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Extra info for Die Methode der graphischen Darstellung und ihre Anwendung in Theorie und Praxis der Radiotechnik

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Stellung ist aus Tabelle 5 zu ersehen. Dieses Ergebnis wird fiir uns erst wertvoll, wenn wir es durch 40 Die Methode der graphischen Darstellung in der Theorie. die graphische Darstellung verbildlichen. Wir erhalten in Abb. 39 die drei Kurven fUr die drei Heizstromstarken i" = 0,4,0,45 und 0,55 Amp. Das Charakteristikum dieser Kurven ist das Erreichen eines Maximums des Anodenstroms i a , denn wir sehen an dem Horizontalverlauf der Linien, daB ia trotz ErhOhung von ea keine hoheren Werte annimmt.

26 gezeichnete Vektor OA stellt den Augenblickswert einer Wechselspannung bzw. eines WechselstroAbb. 25. Rotierende Zeitlinie als Projektionsha is mes dar, und zwar fiir einen Vektor (zur Erlauterung der vektorieUen Darstellung von Wechselstromerscheinungen). bedeutetseine GroBe den Amplitudenwert, seine Richtung, d. h. sein Winkel zu einer Bezugsstellung, seine Phase (seinen zeitlichen Abstand von einem will· kiirlich gewahlten Zeitpunkt aus). Die beiden Vektoren OA und OB in Abb. 28 stellen die Amplitudenwerte zweier Schwingungen (z.

38 angedeuteten Schaltung. Diese Schaltung enthalt drei MeBinstrumente I a' I h und E a' welche drei veranderliche GroBen anzeigen. Ba ist die uns bekannte Anodenbatterie, von der wir verschiedene Die Vorgange in der Elektronenrohre in graphischer Darstellung. 39 Spannungen abzapfen konnen. Sie liegt mit ihrem Pluspol an der Anode A und mit ihrem Minuspol an dem Heizfaden (Kathode) K. Der Heizfaden wird durch die Heizbatterie E", zum Gliihen gebracht; der Heizstrom und damit die Temperatur des Heizfadens kann durch den Regulierwiderstand W verandert werden.

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