Field exciter curve

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The field exciter curve is used to calculate electrical machines . It indicates the magnetic tension over the roll-off of the air gap . The shape of the field exciter curve results from the spatial arrangement of the coils and the phase position of the phase currents. For induction machines such as the synchronous machine, a sinusoidal course of the phase currents, i.e. without harmonics, is aimed for, but due to the actual conductor arrangement, a step-shaped course is established. As a result, disruptive harmonics are also formed in addition to the fundamental.

The magnetic flux density in the air gap is proportional to the field exciter curve.

literature

  • Rolf Fischer: Electrical machines . 14th edition. Hanser, ISBN 978-3-446-41754-0 , Chapter 4.2: Circulating magnetic fields.