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self induction

Self-inductance is an induction effect that opposes the actual induction. When induction is generated in a current-carrying conductor or inductor, the effect of this induction opposes its own current flow. The current-carrying coil or conductor responds equally to its own magnetic field and also to externally induced magnetic fields. The resulting voltage is the self-induction voltage.

The self-inductance depends on the current change ina certain time interval and on the current direction. If the current change in a coil tends towards more positive values, then the magnetic flux change is also positive and the induction voltage increases. The generator voltage for the magnetic field generation and the self-induction voltage are opposite to each other. In this case, the self-induction voltage counteracts the current increase in the coil and slows it down.

The effect of self-induction is particularly noticeable during rapid changes in current, for example during switch-on and switch-off processes. The curve corresponds to that of an e-function. This function is used in integrators, among other things.

Informations:
Englisch: self induction
Updated at: 13.03.2010
#Words: 167
Links: induction, current, conductor, coil, magnetic field (H)
Translations: DE
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