Excitation current

The excitation current flows in the excitation winding of a rotating electrical machine ( motors , generators or converters ). It creates a magnetic field . Depending on the type and structure of the electrical machine, either the rotor or the stator winding acts as an excitation winding. The excitation current is always a direct current , generally referred to as . With synchronous machines, the reactive power behavior of the machine can also be controlled via the excitation current . ${\displaystyle I_{E}}$

The excitation fields can also be generated by permanent magnets . This does not always make sense from a technical point of view. B. in the permanent magnet excitation of a synchronous machine can no longer influence the reactive power behavior.

See also

• Exciter
• Excitation systems for synchronous machines

literature

• Rolf Fischer: Electrical machines. 14th, updated and expanded edition. Carl Hanser Verlag, Munich 2007, ISBN 978-3-446-41754-0 .
• Helmut Lindner, Harry Brauer, Constans Lehmann: Taschenbuch der Elektrotechnik und Elektronik 7th, completely revised edition. Fachbuchverlag Leipzig in Carl Hanser Verlag, Munich 1999, ISBN 978-3-446-21056-1 .