Definition
An inductor (a coil of wire, often wound on an iron core) used in a power supply filter circuit to smooth out pulsating direct current. The choke resists changes in current flow, opposing the ripple that remains after rectification and helping to deliver a steadier DC output.
Plain English
A coil placed in a power supply that helps turn bumpy, pulsing electricity into smooth, steady electricity.
Context Anchor
Seen in aircraft electrical system and avionics power-supply discussions, especially where unwanted electrical ripple or noise must be reduced.
Derivation
‘Choke’ is used here in the engineering sense of restricting or holding back. The coil ‘chokes’ rapid changes in current, letting steady current pass while suppressing the ripples.
Why Pilots Care
Provides clean, stable power to sensitive instruments and radios, preventing noise and erratic readings.
Analogy
Think of it like a heavy flywheel on an engine: it resists sudden changes in speed and keeps things turning smoothly. The choke does the same for current.
Intuition Check
Do not read choke as meaning it completely blocks electricity. Here, it means a coil that resists sudden changes in electrical current while still allowing current to pass.
Example Sentence 1
The filter choke in the power supply smoothed the rectified output before it reached the avionics bus.
Example Sentence 2
During preflight, the mechanic verified the filter choke was intact in the generator control unit.