Current adjustment

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If an electrical energy source and an electrical consumer are directly connected to one another in an electrical circuit , then current adaptation is understood to mean the condition under which the maximum electrical current is determined. It is also understood to be an action through which the maximum current is achieved.

Equivalent circuit diagram of a linear current source (with consumer)

This adaptation is described by the ratio of the internal resistance of the source (or its output resistance ) and the load resistance of the sink (or input resistance of the consumer). When using a source in the form of a linear current source , the current adjustment is implemented when the portion of the generated current intensity is as large as possible and the portion is as small as possible. That requires


The efficiency of a current source can be specified as a function of the resistance ratio , unlike with a voltage source , by


It is greater, the better the inequality above is fulfilled, and is then close to 100%.

The fact that the load resistance is smaller ( lower ) than the internal resistance of the power source leads to the term underfitting . Mostly, but not consistently, it stands for and only says something about non-compliance with the performance adjustment .

Web links

Individual evidence

  1. IEC 60050, see DKE German Commission for Electrical, Electronic and Information Technologies in DIN and VDE: Internationales Electrotechnical Dictionary - IEV. IEV number 702-07-14.
  2. ^ A b Hansjürgen Bausch, Horst Steffen: Electrical engineering, basics. Teubner, 5th ed., 2004, p. 98 f ( limited preview in the Google book search)
  3. Dieter Zastrow: Electrical engineering: A basic textbook. Vieweg + Teubner, 17th ed., 2010, p. 66 ( limited preview in the Google book search)
  4. ^ Rainer Ose: Electrical engineering for engineers: Fundamentals . Hanser, 5th ed., 2014, p. 41 ( limited preview in Google book search)
  5. ^ Franz Moeller, Hans Fricke, Heinrich Frohne, Paul Vaske: Fundamentals of electrical engineering . 17th edition. Springer-Verlag, 1986, ISBN 978-3-519-36400-9 , p. 99 f . ( limited preview in Google Book search)
  6. Wolfgang Böge (Ed.), Peter Franke: Arbeitshilfen und Formuleln für das Technische Studium, Volume 4. Vieweg, 5th Edition, 2001, p. 104 ( limited preview in the Google book search)
  7. Dieter Zastrow: Electrical engineering: textbook and workbook. Vieweg, 9th ed., 1988, p. 72 ( limited preview in Google book search)