Definition
An electric motor designed to operate on direct current. It converts DC electrical energy into rotating mechanical energy by passing current through a wound armature that sits in a magnetic field, producing a continuous turning force on the motor shaft.
Plain English
A motor that runs on steady, one-direction electricity (like from a battery) and uses that electricity to spin a shaft, which then drives something mechanical.
Context Anchor
Seen in aircraft electrical system discussions, especially for equipment such as starters, electric flaps, trim systems, pumps, and small actuators.
Derivation
‘Direct current’ describes electricity that flows steadily in one direction, as opposed to alternating current (AC) which reverses direction many times a second. Most light aircraft electrical systems are DC because they are powered by a battery, and a battery only supplies current in one direction.
Why Pilots Care
DC motors deliver reliable, controllable power for flight-critical systems without needing AC conversion equipment.
Intuition Check
A DC motor does not create direct current. It uses direct current to create turning motion.
Example Sentence 1
When the pilot selected flaps down, the DC motor in the flap drive ran until the flaps reached the selected position.
Example Sentence 2
The technician tested the DC motor current draw before reinstalling the actuator.