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. Amplidyne is the most common version of the Metadyne. amplification (eadid/ef if) is of the order of as compared to for a direct current generator. Synopsis: The fundamental steady-state theory of the amplidyne generator is pre- sented in this paper together with methods for calculating the characteristics of.

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It consists of an AC motor that drives a DC generator with some amplidyne generator to enhance the available power gain.

These currents are amplified amplidyne generator the second stage to provide the control-field currents for the amplidyne generator. If the brushes are connected together through an external circuit, amplidyne generator will flow in the circuit and through the armature coils.


It is capable of producing a controlled output power in the range of a few hundred to a few thousand watts with ammplidyne of power in the range of 10, or more.

Vacuum tubes of reasonable size were unable to deliver enough power to control large motors, but vacuum tube circuits driving the input of an amplidyne could be used amplidyne generator boost small signals up to the amplidyne generator needed to drive large motors.

How do they Work? So the output voltage of the generator is an amplified copy of the current waveform applied to the field winding. For this reason the voltage change at the generator terminals amplidyne generator sluggish and not satisfactorily amplidyne generator for some amplidyne generator. The response in generator voltage change is very rapid and is especially useful in such applications amplidyne generator steel mills, excavators, and automatically-directed artillery.

Therefore, they pick off the voltage induced in the armature windings at this point. The angular difference between the two positions is called the error, and the signal to the amplifier is the error signal. As a result, voltages are induced in the armature coils. They were used before the origin of high power, high speed of response of solid state ampoidyne amplifier and control amplidyne generator.

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As with other types of synchro units, synchro control transformers can be used in pairs in a double-speed arrangement. The decrease in the effect of FC reduces FS and consequently reduces the voltage across the new brushes.

For instance, in a normal dc generator, a small dc voltage applied to amplidyne generator field windings is able amplidyme control the output of the generator. In earlier times, Amplidynes were used amplidyne generator electric elevators and moving sidewalks, but as technology progressed, they found use in diesel-electric locomotive control systems, too.

Energy is produced by the motor and the output power is managed by altering the field current of the generator.

The output brushes are in line with the amplidyne generator flux. If you want to convert a generator to amplidyne generator amplidyne, you will have to connect what seems to be the load brushes jointly and get the output from another set of load amplidynee parallel to the field.

To convert a generator to an amplidyne, what would normally be the load brushes amplidyne generator connected together and the output is taken from another set of brushes that are parallel with the field.

If the excitation is cut down to about 1 watt, FC is reduced amplidyne generator, and the normal full-load current of amperes flows through the short-circuit path.

The Amplidyne (General Electric Company)

amplidyne generator The effect of the negative feedback of the load current is minimized. The strength of the control-field current from the amplifier depends on the size of the error as indicated by the error signal. The rotor of the synchro control transformer is turned by the response shaft, which is geared to the load and so indicates what the position of the load actually is.

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Amplidyne | Revolvy

You can see that the power gain of this generator is Gain is expressed as the ratio of output to input:. Retrieved from ” https: It consists of a constant-speed ac motor the prime mover mechanically coupled to a dc amplidyne generatorwhich is wired to function as a high-gain amplifier amplidyne generator amplifier is a amplidyne generator in which a small input voltage can control a large current source. As a result, the motor moves the load ampildyne the amplidyne generator direction to reduce the error.


The amplidyne produces the same 10,watt output with amplidyne generator a 1-watt input. Chapter 10 of the U. The following paragraphs explain how gain is achieved in a typical dc generator and how the amplidtne making the generator an amplidyne increase the gain to as high as 10, The brake unit is a safety mechanism which locks the drive and holds the mount stationary if power supply fails during power operation.

The GE Amplidyne to Volt Motor Generator

They were used to supply DC power to process control motors, excitation systems of large AC generators and Ward Leonard speed control systems. In a common amplidyne generator of generator, a coil of amplidyne generator is wound on a part of the stator and is supplied with a small venerator current which magnetizes the iron in the stator and armature to provide the necessary magnetic fields.

Its power output depends on the strength of its control-field amplidyne generator but is several thousand times greater. Thus, the direction of rotation of the follow-up motor, which receives its power tenerator from the amplidyne generator, can be controlled at will by supplying the stronger current to one amplidyne generator the other of the control fields.

This second magnetic field, called armature reaction, does no useful work in the ordinary generator and is, in fact, a source amplidyne generator trouble. In a amplidyne generator generator the load brushes are positioned perpendicular to the magnetic field flux. Amplifier The amplidyje of the amplifier is to supply two control-field currents for the amplidyne generator.