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Since field current, and therefore field strength, is little affected by load current, the output voltage remains more nearly constant than does the output voltage of a series-wound generator. There will be a small armature voltage drop on the load, which will be reflected in the voltage applied to the shunt field.
A self-excited shunt-wound DC generator is shown on the left, and a magneto DC generator with permanent field magnets is shown on the right. The shunt-wound generator output varies with the current draw, while the magneto output is steady regardless of load variations. A separately-excited DC generator with bipolar field magnets.
Description: A self-excited shunt-wound DC generator is shown on the left, and a magneto DC generator with permanent field magnets is shown on the right. The shunt-wound generator output varies with the current draw, while the magneto output is steady regardless of load variations. Page 196 Main Wikipedia article: Excitation (magnetic)
Consequent field, four-pole, shunt-wound DC generator Field lines of a four-pole stator passing through a Gramme ring or drum rotor. In the early years of generator development, the stator field went through an evolutionary improvement from a single bipolar field to a later multipole design.
Since an armature is wound with coils of wire, a magnetic field is set up in the armature whenever a current flows in the coils. This field is at right angles to the generator field and is called cross magnetization of the armature. The effect of the armature field is to distort the generator field and shift the neutral plane.
In a shunt-wound motor, the field coils are connected in parallel, or shunted to the armature coils. In a separately excited (sepex) motor, the field coils are supplied from an independent source, such as a motor–generator, and the field current is unaffected by changes in the armature current. The sepex system was sometimes used in DC ...
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A shunt is a device that is designed to provide a low-resistance path for an electrical current in a circuit. It is typically used to divert current away from a system or component in order to prevent overcurrent .