field winding

rotor part

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Last updated

June 26, 2026

Quick Summary

A field winding is the winding of a field magnet. In electric motors, field windings are crucial components that create magnetic fields. These fields interact with other magnetic fields to produce rotation.1

In induction motors, the stator has windings that, when supplied with electricity, create a rotating magnetic field. The rotor, which can be a squirrel-cage type or have insulated coils (wound-rotor), also has conductors. The interaction between the rotating magnetic field from the stator and the conductors in the rotor induces currents in the rotor, generating a magnetic field that causes the rotor to spin.23

Synchronous motors operate differently. Their rotors typically contain an insulated winding connected to a direct current source, creating a magnetic field. This rotor field rotates at the same speed as the stator's rotating magnetic field, causing the rotor to lock in and rotate in sync.4

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electric generator
Rotor
…is thus known as the field winding. The position of the field coils is such that the outwardly directed or radial component of the magnetic field produced in the air gap to the stator is approximately sinusoidally distributed around the periphery of the rotor. In Figure 2, the field density…
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…is thus known as the field winding. The position of the field coils is such that the outwardly directed or radial component of the magnetic field produced in the air gap to the stator is approximately sinusoidally distributed around the periphery of the rotor. In Figure 2, the field density…
Read More