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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.
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.
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)
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 .
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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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