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Electric inductor: principle of operation, purpose, application

Lecture



An inductive coil with a steel magnetic core is called a choke. This is an electromagnetic device in which the coil regulates the current.

Electric inductor: principle of operation, purpose, application

Electric inductor: principle of operation, purpose, application

The higher the L, the smaller the current I, therefore you can change the number of turns of the coil

Electric inductor: principle of operation, purpose, application

1 - winding with the number of turns W
2 - magnetic flux f
l1 - air gap
If you apply to the winding U, then I will flow, which will induce a magnetic flux F in the magnetic core, which induces a self-induction EMF in the winding E.

Actual value:

Electric inductor: principle of operation, purpose, application

With a sinusoidal voltage at the terminals of the winding, the induced emf is also sinusoidal, therefore, if we neglect the voltage losses on the winding, then

Electric inductor: principle of operation, purpose, application

Fm = BmS,

S - the cross-sectional area of ​​the magnetic circuit
Bm - the maximum value of induction

Electric inductor: principle of operation, purpose, application

Inductance L of the working winding depends on the magnetic resistance of the magnetic circuit.

Electric inductor: principle of operation, purpose, application

RDR - resistance of the winding wire

Application: in email. machines, inductive sensors and rectifier filters


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Electrical Engineering, Circuit design

Terms: Electrical Engineering, Circuit design