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An Amplidyne is a rotating amplifier. It is a prime-mover-driven d.c. generator whose output power can be controlled by a small field power input. An amplidyne is. The amplidyne generator is a power amplifier on a large scale. Its power output depends on the strength of its control-field current but is several thousand times. Amplidynes are special-purpose dc generators. They supply large dc.

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Sparkomatic topic Sparkomatic was a USA-based manufacturer of car audio products. Amplidynes were initially used for electric elevators and to point naval gunsand antiaircraft artillery radar such as SCR in Commutators are used in direct current DC machines: Navy and also used in passenger lifts of large mines. The amplidyne is used in industry in high power servo and control systems, to amplify low power control signals to control powerful electric motors, for example. The reverse conversion of electrical energy into mechanical energy is done by an electric motor, and motors and generators have many similarities.

The load currents and the short-circuit currents obviously cannot exist simultaneously in the armature conductors, but combine algebraically to produce the true current.

Amplidyne | Revolvy

This second magnetic field, called amplidyme reaction, does no useful work in the ordinary generator and is, in fact, a source of trouble. Member feedback about Ernst Alexanderson: The technical description is “a cross-field direct current machine designed to utilize armature reaction”.

Newman outlined his claims about there being a fundamental electromagnetic interaction in all matter ultimately derived from only one type of force particle propa So the output voltage of the generator is an amplified copy of the current waveform applied to the field winding.

The first electromagnetic generator, the Faraday disk, was invented in by British scientist Michael Faraday.

Amplidyne – Wikipedia

Adjustable and variable speed drives may be purely mechanical termed variatorselectromechanical, hydraulic, or electronic. A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. The moving parts in a machine can be rotating rotating machines or linear linear machines. The magnetic core is in two parts; a stator which is stationary, and a rotor, which rotates within genfrator.

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Stepper motor topic Animation of a simplified stepper motor unipolar Frame 1: Schematic of a synchro transducer. They are placed against the commutator in a position perpendicular to the original brushes, as shown in figure It is now mostly obsolete.

Electric machine topic In electrical engineering, electric machine is a general term for machines using electromagnetic forces, such as electric motors, electric generators, and others.

Connected to automatic anti-aircraft gun directors, the tracking motion in two dimensions had to be extremely smooth and precise. Controller technology that limits torque ripple at low speeds has been demonstrated. Navy manual Naval Ordnance and Gunnery, Volume 1 explains the operation of the amplidyne: The screw and magnet spin, with the screw tip acting as a bearing. Disadvantages are high torque ripple the difference between maximum and minimum torque during one revolution when operated at low speed, and noise ampljdyne to torque ripple[1].

The company had their production facility in Milford PA. Permanent magnet motors are more efficient than traditional induction motors or motors with field windings for certain high-efficiency applications such as electric vehicles.

The above is an oversimplification and is not meant to describe a functioning system.

The Amplidyne (General Electric Company)

The system diagram right is a feedback control system in which a feedback signal from a sensor representing the current position of the gun is compared with the control signal which represents the desired position, and the difference is amplified by the amplidyne generator to turn the gun mount motor.

Doubly-fed electric machine topic Doubly-fed electric machines also slip-ring generators are electric motors or electric generators, where both the field magnet windings and armature windings are separately connected to equipment outside the machine. The most common mode of operation is as a Lorentz-type actuator, in amplidye the appli Adjustable-speed drive topic Line regenerative variable frequency drives, showing capacitors top cylinders and inductors attached which filter the regenerated power.


The magnetic field lines pass in a continuous loop or magnetic circuit from the stator through the rotor and back through the stator again.

The GE Amplidyne 115 to 250 Volt Motor Generator

Alternators in power stations driven by steam turbines are called turbo-alternators. There are two basic types of inverter available, known as modified sine-wave inverter and pure sine wave inverter, the former being the most common and least costly. Cutaway view through stator of TEFC induction motor, showing rotor with internal air circulation vanes.

Such a simple modification can enhance the gain by 10, times or more.

A commutator, B brush, C rotor armature windings, D stator F field windings, E brush guides A commutator is a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. As previously stated, an amplidyne is used to provide large dc currents.

Electric motors may be classified by considerations such as power source type, internal construction, application and type of motion output. Unlike an ordinary motor-generatorthe purpose of an amplidyne is not to generate a steady voltage but to generate a voltage proportional to an input current, to amplify the input.

Doubly-fed electric machines also slip-ring generators are electric motors or electric generators, where both the field magnet windings and armature windings are separately connected to equipment outside the machine. This ampkidyne field is invisible but is responsible for the most notable property of gdnerator magnet: However, linear motors are not necessarily straight.