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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The high voltage formerly existing between these points has almost disappeared. It is this magnetic field which induces the volts which appears across the brushes. We also offers 50hz export power inverters. The product line included aftermarket car transmission shifters and related automotive accessories such as tachometers and oil gauges.

Synchro control transformer The functioning of a synchro control transformer was described earlier in this chapter. Member feedback about Third-brush dynamo: Electromagnetism Revolvy Brain revolvybrain. Unlike common DC motor types, power is delivered to windings in egnerator stator case rather than the rotor. The effect of the negative feedback of the load current is minimized. Circuit Globe Special Machines Amplidyne.

It is similar to a third brush dynamo but has additional regulator or “variator” windings. They are now replaced by the solid state power amplifiers.

The Amplidyne (General Electric Company)

The switch may be manually operated or may be a relay or contactor connected to some form of sensor to automatically start and stop the motor. Picture from US Patent by Eric Laithwaite A linear induction motor LIM is an alternating current ACasynchronous linear motor that works by the same general principles as other induction motors but is typically designed to directly produce motion in a straight line.

Audio equipment manufacturers Revolvy Brain revolvybrain. The magnet, made in the shape of a horseshoe, has the two magnetic poles close together. Automation Revolvy Brain revolvybrain.

Reasonably sized vacuum tubes were not able to deliver sufficient power to control large sized motors, but vacuum tube circuits that drove the input of amplidynes could be utilized to enhance small signals higher up to the power required to drive large motors. Shaded-pole motor topic Small C-frame shaded-pole squirrel-cage motor.

Stepper motor topic Animation of a simplified stepper motor unipolar Frame 1: The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings. The motor’s position can then be commanded to move and hold at one of these steps with Both synchros are connected to the input of an electronic amplifier, but a relay, switching circuit, or electrical network automatically selects the output of either the coarse generatot the fine synchro.


The amplidyne’s frequency response is limited to low frequencies, it cannot even handle audio frequencies, so its use is limited amplidynw amplifying low frequency control signals in industrial processes. 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 generaor is amplified by the amplidyne generator to turn the gun mount motor.

Schematic symbol of a slip ring motor A wound-rotor motor is a type of induction motor where the rotor windings are connected through slip rings to external resistance. Member feedback about Stepper motor: Cutaway view through stator of TEFC induction motor, showing wmplidyne with internal air circulation vanes.

A permanent magnet motor is a type of brushless electric motor that uses permanent magnets rather than winding in the field.

In a rotating machine, the field coils are wound on an iron magnetic core which guides the magnetic field lines. Brush electric topic A pair of carbon brushes A brush or carbon brush is a device which conducts current between stationary wires and moving parts, most commonly in a rotating shaft.

This means that the 3 volts output is times larger than the input. They were also used in diesel electric locomotive control systems.

By the mids the company had become known for their car audio products and accessories, though they continued to sell other non-audio accessories for a short time longer. Where speeds may be selected from several different pre-set ranges, usually the drive is said to be adjustable speed. This is a servo generrator ensures the valve opens to the desired amplidjne regardless of friction A common type of servo provides position control.

Retrieved from ” https: These now become the output brushes of the amplidyne. DC motor topic Workings of a brushed electric motor with a two-pole rotor armature and permanent magnet stator.

They were used to supply DC power to process control motors, excitation systems of large AC generators and Ward Leonard speed control systems. The magnetic field lines green of a current-carrying loop of wire pass through the center of the loop, concentrating the field there An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil, spiral or helix.


As a result, the polarity of the amplidyne output is reversed; the motor tries to run in the reverse direction, and so applies a retarding force to the load. Early 20th-century alternator made by Ganz Works in in Budapest, Hungary, in the power generating hall of the biggest hydroelectric station of the Russian Empire photograph by Prokudin-Gorsky, [1] An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current.

When the mount is to move in the opposite direction, the unbalance in the control currents must be geherator. 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. Synchronous reluctance Variable reluctance Switched reluctance Variable reluctance stepping.

The simplest case is a switch to connect a motor to a power source, such as in small appliances or power tools. For pratical purposes, an inverter size of 2, watts will be needed or will amolidyne be installed in an RV. Transformers electrical Revolvy Brain revolvybrain. AC asynchronous induction IM. In the equipment now in use, excitation is supplied to two control windings which are oppositely wound.

The GE Amplidyne to Volt Motor Generator

When the motor reaches full speed the rotor poles are switched to short circuit. The magnet is on the screw head.

Electric machines were developed beginning in the mid 19th amplicyne and since that time have been a ubiquitous component of the infrastructure. The field is no longer strong enough to allow an output voltage to be developed, so the motor ceases to drive the object antenna.

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