AMPLIDYNE PDF

Amplidyne definition, a direct-current generator with a rotating armature, capable of magnifying a small amount of power supplied to the field winding of the. 31 Jul The GE Amplidyne to Volt Motor Generator The GE Amplidyne The Amplidyne Motor Generator is a special purpose motor generator. 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.

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The difference between the two control currents determines the amount of power supplied to the motor. An amplidyne is an electric motor which turns a generator on the same shaft. This field may be adjusted to balance out FA and thus restore the full effect of the exciting field FC.

The amplidyne is really a motor and a generator. This represents a gain of 10, This means that the 3 volts output is times larger than the input. Your email address will not be published. Considering the case of a typical generator, the load brushes are situated perpendicular to the magnetic field flux.

The GE Amplidyne to Volt Motor Generator

The excitation current produces a magnetic field whose direction is indicated by the arrow FC. Amplidynes are special-purpose dc generators. Leave a Reply Cancel reply Your email address will not be published.

The positions of these points depend on the direction of the magnetic field and do not change as the commutator rotates. The reason for this is that current flowing in the armature coils between these brushes has created ajplidyne second armature reaction FA which opposes the exciting field FC and reduces its effect.

They are placed against the commutator in a position perpendicular to the original brushes, as shown in figure The power output of the amplidyne is then much less than when the speed is increasing or decreasing, and the error will be correspondingly smaller.

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When the error signal calls for movement of the mount in one direction, one control current must increase and the other must decrease. The amplification is 10, to 1 instead of to 1. You can see that the power gain of this generator is Shipboard tests of automatic control equipment.

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 direction of the magnetic field FC and the polarity of the output of the generator depend upon which winding receives the stronger current. This compensating winding carries the load current i d.

Diesel-electric locomotive control systems. The first step is to short the brushes together, as shown in figure If the 3 volts applied to the field winding is considered an input, and the volts taken from the brushes is an output, there is a gain of The voltage at the output will be the same as in the original generator, volts in our example.

The additional power is supplied by the motor which drives the amplidyne generator. A low-power, relatively weak voltage representing the amount of antenna rotation required can be used to amplidhne the field winding of an amplidyne.

Amplidyne | Define Amplidyne at

However, today MOSFETs can produce even high power gains of as high as 1, and IGBT are also capable of achieving power gains in the range ofwhich is why you don’t get to see amplidynes in action anymore. Amplidynes had numerous advantages over vacuum tubes, with the biggest one, of course, being the sheer fact that they could produce power gains as high as They are now replaced by the solid state power amplifiers.

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Retrieved from ” https: The degree of compensation C is defined as the ratio of effective compensating winding turns to the effective armature turns.

In following the usual gun-train amolidyne gun-elevation order, the errors should not be more than a few minutes of arc under the most adverse conditions. 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.

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.

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 or the fine synchro.

The Initial Replacement for Vacuum Tubes A few decades back, amplidynes were one of the first few amplifiers to produce an extremely high power in the range of tens of kilowatts, giving way for accurate feedback control of heavy machines. As with other types of synchro units, synchro control transformers can be used in pairs in a double-speed arrangement.

Chapter 10 of the U.

The synchro control transformer. Its power output depends on the strength of its control-field current but is several thousand times greater. If the brushes are connected together through an external circuit, current will flow in the circuit and through the armature coils. The amplification, therefore, is to 1.

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