Definition
A field winding in a DC generator that is connected in parallel (shunt) with the armature, using many turns of fine wire to produce the magnetic field that induces voltage in the armature. Output voltage is regulated by varying the small current flowing through this winding.
Plain English
It is the set of wire coils in a generator that creates the magnet, wired alongside the main output rather than in line with it. By adjusting how much current flows through these coils, the generator's output voltage can be controlled.
Context Anchor
Seen in aircraft electrical system maintenance, especially when learning how DC generators, voltage regulators, and charging problems are checked.
Derivation
Shunt comes from an old English word meaning to turn aside or divert. In electrical use, a shunt is a path placed alongside another path so current can split between them. The shunt field is wired alongside (in parallel with) the armature, not in series with it.
Why Pilots Care
Maintains stable voltage output critical for reliable aircraft electrical power and instrument function.
Intuition Check
Do not read “field” as a physical area outside the aircraft. Here it means the magnetic field inside the generator. Do not read “shunt” as something being shut off. Here it means a parallel electrical path.
Example Sentence 1
The voltage regulator adjusts current through the generator shunt field to hold the bus voltage near 28 volts.
Example Sentence 2
A faulty shunt field caused the generator to produce unstable voltage in flight.