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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ScottyUK Quote; If my memory is right, ‘Amplidyne’ is a ampliidyne of ‘Amplifying Dynamo’ which probably gives you some clue as to how it works. It is capable of producing a controlled output power in the range of a amplidune hundred to a few thousand watts with amplification of power in the range of 10, or more.
The direction of rotation of the motor depends on the polarity of the output of the amplidyne generator, which in turn depends on the direction of the error as indicated by the error signal. By joining you are opting in to receive e-mail. Join your peers on the Internet’s largest technical engineering professional community.
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. In figure 10D2the upper view represents an ordinary direct-current generator such as the one just described.
This page xmplidyne last edited on 18 Juneat What I am getting at is generaror. The amplifier receives the alternating-current error signal, amplifies it, and converts it into direct current suitable to energize the field windings of the amplidyne generator.
As a result, the motor moves the load in the proper direction to reduce the error. The power applied to the follow-up motor, therefore, is greater for a large error than for a small one. Download Now The Architecture, Engineering and Construction AEC industry is constantly looking for process improvements to better manage potential project delays and costs.
The amplidyne is used in industry in high power servo and control systems, to amplify low power control signals to control powerful electric motorsfor example. If the order signal suddenly slows down, the load may overrun the signal and reverse the direction of the error.
The armature current from the new brushes has been taken through a compensating field winding and creates a magnetic field FB opposed to FA.
The motor would have the field continuously excited at rated voltage. The direction of the magnetic field FC and the polarity of the output of the generator depend upon which winding receives the stronger current.
At the same time, the amp load current flowing in the armature coils creates another magnetic field FS at right angles to FC. Your email address will not be published. Identical synchros are used, but they are geared at They were used to supply DC power to process control motors, excitation systems of large AC generators and Ward Leonard speed control systems.
Early World War II era gun tracking and radar systems used this approach. Circuit Globe All about Electrical and Electronics. 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.
Used to remotely operate the control rods in early nuclear submarine designs S3G Triton. A low-power, relatively weak voltage representing the amount of antenna rotation required can be used xmplidyne control the field winding of an amplidyne. As you have seen, the original generator produced a 10,watt output with a watt input. Larger models were belt driven.
Amplidyne | Revolvy
This is the basic principle of a generator. 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 It consists of an electric motor driving a DC generator.
These now become the output brushes of the amplidyne. 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 difference is amplified by the amplidyne generator to turn the amplidyje mount motor.
A good source for operation theory on “Rotating Amplifiers” including amplidynes, 2-stage and multi-stage rototrols would be any of a number of books on DC Machines authored by Michael Liwschitz-Garik.
The ends of the armature coils in a DC generator are geneator to copper bars on a commutator which rotates with the armature. The perpendicular brushes are now called the ‘quadrature’ brushes.
An amplidyne is a special type of dc generator.
I have an old manual about the Centurion tank gun system where the amplidyne is described. It is meant to strengthen the idea that with the amplidyne, something large and heavy can be controlled very precisely by something very small, almost insignificant. Students Click Here Join Us! This field may be adjusted to balance out FA and thus restore the full effect of the exciting field FC. Though the GE Amplidyne to Volt Motor Generator is outdated today, several folks still look out for it today, though it’s quite probable that some of them may be just curious to know about these World War II era machines, despite the fact that there are several modern electronic devices to control power in the kilowatts range.
It is this magnetic field which induces the volts which appears across the brushes. Specifically, the phase of the control transformer’s output in phase with the synchro power source, or opposite phase provided the polarity of the error signal. Assume that the characteristics of this generator enable it to produce approximately 87 amperes of armature current at volts at the output terminals.
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. 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. Views Read Edit View history. Most of its applications were in the field of feedback control systems, and it was used primarily as a voltage regulator. This little generator had the normal output brushes shorted together through a small resistance.
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.