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 first step is to short the brushes together, as shown in figure They also generate lots of heat, which is why they have large heat sinks metal fins and often cooling fans as well.

Member feedback about Generagor Alexanderson: When the source of the input voltage senses the correct movement of the object, it drops the voltage to zero. In fluid powered devices, the stator guides the flow of fluid to or from the rotating part of the system. Member feedback ampoidyne Metadyne: AC motors Revolvy Brain revolvybrain. Servomotors are used in applications such as robotics, CNC machinery or automated manufacturing.

It also requires a relatively sophisticated controller, often a dedicated module designed specifically for use with servomotors. By arranging the field winding with multiple taps, the speed characteristic could be varied, allowing relatively smooth operator control of acceleration.

Circuitry that performs the opposite function, converting AC to DC, is called a rectifier. Notice the concentrated windings on the stator poles. Battery charging can also occur automatically, although it’s usually possible to override this manually. Navy manual Naval Ordnance and Gunnery, Volume 1 explains the operation of the amplidyne: Vector control, also called field-oriented control FOCis a variable-frequency drive VFD control method in which the stator currents of a three-phase AC electric motor are identified as two orthogonal components that can be visualized with a vector.

The universal motor is a type of electric motor that can operate on either AC or DC power and uses an electromagnet as its stator to create its magnetic field.

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The view is perpendicular to the channel axis. The genertor switch has four positions: A “horseshoe magnet” made of alnico, an iron alloy. The master switch is a start-stop push button used to start and stop the amplidyne motor-generator. Both make sense for geneartor drive single-gear transmission as the drive units of the cars. The perpendicular brushes are now called the ‘quadrature’ brushes. During the start-up a typical rotor has 3 poles connected to the slip ring. The switched reluctance motor SRM is a type of stepper motor, an electric motor that runs geerator reluctance torque.

What is an Amplidyne? – Circuit Globe

Ampildyne in power stations driven by steam turbines are called turbo-alternators. The amplidyne’s frequency response is limited to low frequencies, it cannot even handle audio frequencies, so its use is limited to amplifying low frequency control signals in industrial processes.

History Electromagnetic rotation experiment of Faraday, ca. This is the basic principle of a generator.

The GE Amplidyne 115 to 250 Volt Motor Generator

The most common mode of operation is as a Lorentz-type actuator, in which the appli The input voltage depends on the design and purpose of the inverter. Electric motors can be powered by direct generatr DC sources, such as from batteries, motor vehicles or rectifiers, or by alternating current AC sources, such as a power grid, inverters or electrical generators.

The switch may have several positions to select different connections o Depending on the connections of the field to the power supply, the speed and generagor characteristics of a brushed motor can be altered to provide steady speed or speed inversely proportional to the mechanical load. Schematic of a synchro transducer. Member feedback about Brush electric: InNewman attempted to patent the device, but was rejected by the United States Patent Office as being a perpetual motion machine.

In the company branched into car audio accessories with a line of FM car radios, speakers and generatro accessories. These provided a speed-torque characteristic useful for propulsion, providing high torque at lower speeds for acceleration of the vehicle, and declining torque as speed increased.


For this reason the voltage change generaror the generator terminals is sluggish and not satisfactorily responsive for some purposes. In following the usual gun-train or gun-elevation order, the errors should not be more than a few minutes of arc under the most amplidgne conditions.

Inverters are available in sizes ranging from as low as 30 watts up to 4, watts or more. Cutaway view through stator of TEFC induction motor, showing rotor with internal air circulation vanes. Ernst Alexanderson topic Ernst Frederick Werner Alexanderson January 25, — May 14, was a Swedish-American electrical engineer, who was a pioneer in radio and television development. Servomotors are not a specific class of motor although the term servomotor is often used to refer to a motor suitable for use in a closed-loop control system.

The large brown molded-plastic piece in the foreground supports the brush guides and brushes both sidesas well as the front motor bearing.

All articles with unsourced statements Articles with unsourced statements from July Articles with unsourced statements from December The amplidyne generator, shown in Fig. The top electromagnet 1 is turned on, attracting the nearest teeth of the gear-shaped iron rotor.

Such a simple modification can enhance the gain by 10, times or more. Three-phase squirrel-cage induction motors are widely used as industrial drives because they are self-starting, reliable and e This is because they are in quadrature perpendicular to the output brushes. The signal to be amplified is applied to the generator’s field windingand its output voltage is an amplified copy of the field current.