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Horn-gap, choke-coil protector for alternating-current lines.

Alternating Current

Horn-gap, choke-coil protector for alternating-current lines.

A Multigap alternating-current arrester with series resistance arranged for pole mounting.

Arrester

A Multigap alternating-current arrester with series resistance arranged for pole mounting.

An AC motor is an electric motor that is driven by an alternating current. It consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft that is given a torque by the rotating field. There are two types of AC motors, depending on the type of rotor used. The first is the synchronous motor, which rotates exactly at the supply frequency or a sub multiple of the supply frequency. The magnetic field on the rotor is either generated by current delivered through slip rings or by a permanent magnet.The second type is the induction motor, which turns slightly slower than the supply frequency. The magnetic field on the rotor of this motor is created by an induced current.

Current Motor

An AC motor is an electric motor that is driven by an alternating current. It consists of two basic…

An illustration showing the distribution losses in a small, alternating current central station.

Power Lines

An illustration showing the distribution losses in a small, alternating current central station.