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. 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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The voltage at the output will be the same as in the original generator, volts in our example. The output would power the field of a generator that had the armature direct connected to the armature of a motor.

The excitation current produces a magnetic amplidyn whose direction is indicated by the arrow FC. By balancing the control currents, the amplidyne output is brought to zero and the motor stands still.

Close this window and log in. Sorry to be a bit out of touch with some terminology.

The schematic diagram in figure shows a separately excited dc generator. The diagrams in Gunnar’s link show the connection well enough. A small amplidyne would have a control signal that varied from generayor to 2 watts. The strength of the control-field current from the amplifier depends on the size of the error generatod indicated by the error signal. Electrical power out is much greater than electrical power in, the difference coming from the prime mover turning the shaft.

The amplidyne generator is a power amplifier on a large scale. Leave a Reply Cancel generatpr Your email address will not be published. They needed too much care with their collector, sets of brushes, bearings, alignement, lubrication and all such stuff that we hate. To convert a generator to an amplidyne, what would normally be the load brushes are connected together and the output is taken from another set of brushes that are parallel with the field.


Diesel-electric locomotive control systems. The indicator-regulator contains the synchro control transformer and the indicator dials.

Therefore, they pick off the voltage induced in the armature xmplidyne at this point. In the above case of the GE Amplidyne to Volt Motor Generator, the characteristics of the generator facilitate generating around 87 ampere of armature current at volts at the terminals for output; the values range accordingly for variations up to volts.

ScottyUK Quote; If my memory is right, ‘Amplidyne’ is a contraction of ‘Amplifying Dynamo’ which probably gives you some clue as to how it works.

The gun tracking and radar systems that were used during World War II made use of this approach, and the GE Amplidyne motor generator was one such machine.

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

Amplidyne – Wikipedia

The perpendicular brushes are now called the genetator brushes. Thus, the direction of rotation of the follow-up motor, genertaor receives its power supply from the amplidyne generator, can be controlled at will by supplying the stronger current to one or the other of the control generatof. 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.


When a coil of wire is rotated in a magnetic field, voltage are induced in the coil, and, if the ends of the coil are connected together, these voltages cause electric currents to flow in the coil. The amplidyne is an amplifier because it uses the input electrical signal to control how much shaft power zmplidyne converted to electrical power.

In the initial period, amplidynes were used for moving sidewalks, electric elevators, anti-aircraft artillery radar, and to point naval guns.

Coilgun Railgun Superconducting machine. When the order signal moves at a uniform speed, the motor must supply only enough power to overcome the friction in the system. The amplidyne was first used in the US Navy in servo systems gneerator control the electric motors rotating naval gun mounts, to aim the gun at a target.

This second magnetic field, called armature reaction, does no useful work in the ordinary generator and is, in fact, a source of trouble.

Power out of a transformer is equal to power in less losses, so no amplification from a transformer. Amplidynes are special-purpose dc generators.

If now the brushes are short-circuited, as amplidhne in the second view, an immense armature current will flow unless the excitation is reduced.

I have a shop manual in my files for the GE units. It’s easy to join and it’s free.