Definition

1. Noun:
   • A magnet that provides a magnetic field in a dynamo or electric motor: A "field magnet" is a permanent magnet or an electromagnet used to generate a steady magnetic field within an electrical machine, such as a generator (dynamo) or motor. This magnetic field is essential for the machine's operation, as it interacts with electric currents to produce motion or generate electricity.

Usage Examples

• Noun:
  • The engineer replaced the damaged field magnet in the old dynamo.
  • In a simple DC motor, the field magnet is typically a permanent magnet.
  • The strength of the field magnet directly influences the motor's torque.

Advanced Usage

• Technical Context: In engineering, the term is used to specify the source of the stationary magnetic field in rotating electrical machinery. It is often contrasted with the armature, which is the rotating part carrying the current.
  • The design uses an electromagnet as the field magnet to allow for adjustable speed control.

Variants and Related Words

• Field winding (n): The coil of wire in an electromagnet that serves as the field magnet when an electric current passes through it.
  • The field winding must be properly insulated.

Synonyms

• Exciter magnet: A magnet that excites or produces the main magnetic field in a machine.
• Stator magnet: In some motor designs, the field magnet is part of the stationary stator.

Related Phrases

• Field coil: Often used interchangeably with "field magnet" when referring to an electromagnet, specifically the coil that creates the magnetic field.
  • The field coil was overheating, causing the motor to fail.

Noun

1. a magnet that provides a magnetic field in a dynamo or electric motor