Electrical

Permanent Magnet

A magnet that can retain its magnetism after the magnetizing force has been removed.

Temporary Magnet

A magnet that retains trace amounts of magnetism after the magnetizing force has been removed.

Electromagnet

A magnet whose magnetic energy is produced by the flow of electric current.

Alternating Current (AC) Motor

A motor that uses alternating current to produce rotation.

Commutator

A ring made of segments that are insulated from one another.

Transformer

An electric device that used electromagneticism to change voltage from one level to another or to isolate one voltage from another.

Solenoid

An electric output device that converts electrical energy into a linear mechanical force.

Magnetic Motor Starter

An electrically operated switch (contactor) that includes motor overload protection.

Field Windings

Electromagnets used to produce the magnetic field in a generator.

Solenoid operated valves control:

Hydraulic and Pneumatic Equipment

Field Windings

Magnets used to produce the magnetic field in a generator.

Three-Phase Motors

Most common motors used in industrial applications.

Magnetic Coils

Normally constructed of many turns of insulated copper wire wound on a spool.

Low Voltage

Produces low coil current and reduced magnetic pull.

Two characteristics of a solenoid

1. Amount of voltage applied to the coil 2. Amount of current allowed to pass through the coil

High Voltage

A coil draws more than its rated current if the voltage applied to the coil is too high. Excessive heat is produced, which causes early failure of the coil insulation.

Motor

A machine that converts electrical energy into mechanical energy by means of electromagnetic induction.

Generator

A machine that converts mechanical energy into electrical energy by means of electromagnetic induction.

Direct Current (DC) Motor

A motor that uses direct current connected to the field and armature to produce shaft rotation.

Control Transformer

A transformer that is used to step down the voltage to the control circuit of a system or machine.

Armature

The movable coil of wire in a generator that rotates through the magnetic field.

Eddy Current

Unwanted current induced in the metal structure of a device due to the rate of change in the induce magnetic field.