1. A converter in which motor and generator windings are combined on one armature and excited by one magnetic field: A synchronous converter is normally used to change alternating to direct current and is also known as a converter or electric converter.
2. A synchronous device used to convert alternating current (AC) to direct current (DC), or the reverse: The AC-to-DC converter, provided by the synchronous converter, has been replaced by a mercury arc rectifier (for reasons of efficiency, lower maintenance costs, and fewer problems) or by motor-generator sets.

A converter which transforms the dynamic energy of a gaseous fluid into electric energy by passing through an electrostatic field a gas that contains electrically charged particles.

The action is similar to that of a Van de Graaff generator, but higher power density can be obtained.

A Van de Graaff generator is a type of electrostatic generator used to build up static electrical charge of very high voltages by transferring electric charge from a power supply to a spherical metal terminal.

A high-voltage source transfers an electric charge to a nonconducting conveyor belt, usually made of silk or rubber, which continuously redeposits the charge on the insulated metal terminal, where it accumulates.

Even small Van de Graaff generators can accumulate a static charge of 100,000 volts; the largest, up to ten million volts.

1. A tool which projects an optical image generated by electromagnetic radiation from a photosensitive surface onto a fluorescent screen.
2. An electron tube which reproduces on its fluorescent screen an image of the optical image or other irradiation pattern arriving at or striking its photosensitive surface.
3. A cathode-ray tube that has a photoemissive mosaic upon which an optical image is projected, and an electron gun to scan the mosaic and to convert the optical image into a corresponding electrical current.

A device that translates the data transmission code and protocol of one computer or peripheral device to that of another computer or device, and so enabling communication between otherwise incompatible devices.

1. A device that converts an analogue input voltage into a sequence of digital pulses with a frequency that is proportional to the input voltage.
2. A converter that has an output frequency which is a function of some reference or control signal.

This digital output can be fed into a computer for a process control or for other applications.