ELECTRONAGNETIC MECHANISM

Electromagnetic mechanism are devices that can covert movement into electricity or vice versa. In other words, they use electromagnetic phenomena to produce electricity or convert it into mechanical energy.

ELECTROMAGNETIC GENERATORS

Electromagnetic generators transform mechanical energy into electriciy. There are two types of generators, depending on the type of current that is produce. Generators that produce direct current are called dynamos, and those that produce alternating current are called alternators

-Dynamos

A dynamo consist of a magnet and a rotary coil. The coil is located between the two poles of the magnet. The ends of the coil have tow semi-circulaar conductors, which form the commutator. These conductors are attached to carbon brushes, which in turn are conected to electrical wires. When electricty is applied to the coil, it rotaters and begins to generate direct current in the coil.

-Alternators

A simple alternator is almost identical to a dynamo, except for the commutator, which consist of two metallic rings connected to carbon brushes, Instead of direct current, this produce altenating current

ELECTRIC MOTORS

An electric motor is device that can transform electrical energy into movement. It uses the forces of attraction and repulsion between a magnet and an elctrically-charged wire.

RELAY

A relay os an elctromagnetic component that works as a switch. When electricity passes through the coil, it acts like a magnet. The coil attracts a moveable metal contact towards another fixed contact.