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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 field is no longer strong enough to allow an output voltage to be developed, so the motor ceases to drive the object antenna.
In a common form of generator, a coil of wire is wound on a part of the stator and is supplied with a small exciting current which magnetizes the iron in the stator and armature to provide the necessary amplisyne fields.
The amplidyne generator is a power amplifier on a large scale.
At a simple level the small input signal is boosted by the output of the device which is itself dependent on the input signal. The voltage at the output will be the same as in the original generator, volts in our example. Other times I just let her sleep!
Therefore, they pick off the voltage induced in the armature windings at this point. Sorry to be a bit out of touch with some terminology. They are now replaced by the solid state power amplifiers. There’s some discussion of the Amplidyne from about half way down this page. The GE amplidyne, renamed the metadyne and various other names in other countries, henerator still in limited use today.
This field may be adjusted to balance out FA and thus restore the full effect of the exciting field FC. The connections to the commutators are such that the maximum voltage appears across two points on opposite sides of the commutator.
The armature reaction FS induces a voltage in the armature in the same manner as flux FC but this voltage appears geenrator the commutator at 90 degrees from the voltage induced by FC. It is this magnetic field which induces the volts which appears across the brushes.
If now the brushes are short-circuited, as shown in the second view, an immense armature current will flow unless the excitation is reduced. Power out of a transformer is equal to power in less losses, so no amplification from a transformer. 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.
The Architecture, Engineering and Construction AEC industry is constantly looking for process improvements to better manage potential project delays and costs. Thus, the direction of rotation of the follow-up motor, which 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 fields.
The intent is to show a typical sequence of events between the demand for movement and the movement itself. 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. A series connected quadrature axis q axis winding is placed on the stator of the amplidyne to improve its performance and, as a result, quadrature q axis commutation also improves.
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 If no error exists, the system is said to be in correspondence and the error signal is zero. Download Now The Architecture, Engineering and Construction AEC industry is constantly looking for process improvements to better manage potential project delays and costs.
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 adverse conditions.
In a typical generator, a change in voltage from 0-volt dc to 3-volts dc applied to the field winding may cause the generator output to vary from 0-volt dc to volts dc. They were also used in diesel electric locomotive control systems.
Generztor power output of the amplidyne venerator then much less than when the speed is increasing or decreasing, and the error will be correspondingly smaller. The units that I was familiar with had a power gain of about to 1. It consists of an AC motor that drives a DC generator with some alterations to enhance the available power gain.
This removes nearly all of the resistance in the armature circuit. Its power output depends on the strength of its control-field current but is several thousand times greater.
The amplidyne is a DC generator with an internal positive feed-back. In effect, watts controls 10, watts. Contraction of Amplifying Dynamo”: Circuit Globe All about Electrical and Electronics. The amplidyne is used in industry genwrator high power servo and control systems, to amplify low power control signals to control powerful electric motorsfor example.
Thanks for the help guys. The master switch is a start-stop push button used to start and stop the amplidyne motor-generator. Amlidyne Linear Servomotor Stepper Traction. The Amplidyne Motor Generator is a special purpose motor generator that supplies precisely controlled DC current to large sized DC motors that are used for driving heavy loads like missile launchers and gun turrets.
Students Click Here Join Us! I have an old manual about the Centurion tank gun system where the amplidyne is described. These currents are amplified in the second stage to provide the control-field currents for the amplidyne generator.
Synchro control transformer The functioning of a synchro control transformer was described earlier in this chapter.