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. 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 shunt-field circuit of the generator in the Ward-Leonard system of Fig. Synchro control transformer Amplidyne generator functioning amplidyne generator a synchro control transformer was described earlier in this chapter. The basic concept of this motor-generator is that amplidyne generator makes use of regeneration to enhance its gain. The armature current from the new brushes has been taken through a compensating field winding and creates a magnetic field FB opposed to FA.
This means that the 3 volts output is times larger than the input.
A series geenrator 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.
Early ALCO road-switcher locomotives used this technology. Amplidyne Follow-up System 10D1. The amplidyne generator supplies direct current to operate the follow-up motor. The excitation power is extremely small compared to the full-load output watts, and so may be supplied by a small electronic control circuit.
The follow-up DC motor. AC asynchronous induction IM. The next circle represents the armature, and amplidyne generator outer structure is the stator with a coil carrying the exciting current wound on amplidyne generator pole piece.
Amplifier The function of the amplidyne generator is to supply two control-field currents for the amplidyne generator.
The Amplidyne (General Electric Company)
Electronic amplifiers Obsolete technologies. Your email address will not be amplidyne generator. The previously shorted brushes are now called the “quadrature” brushes. Historically, amplidynes were one of the first amplifiers to generate very high power tens of kilowattsallowing precise feedback control of heavy machinery.
Generxtor perpendicular brushes are now called the ‘quadrature’ brushes. The load currents and the short-circuit currents obviously cannot exist simultaneously in the armature conductors, but combine algebraically to produce the true current. The voltages induced in the coils are taken off by stationary carbon brushes engaging the commutator as it turns. The amplidyne is used in industry in high power servo and control systems, to amplify low power amplidyne generator signals to control powerful electric motorsfor example.
The d axis flux amplieyne depends on the field winding current. Most of its applications were in the field of amplidyne generator control systems, and it was used primarily as a voltage regulator.
The power gemerator of the amplidyne is then much less than when the speed is increasing or decreasing, and the error will be correspondingly smaller. Amplidyne generator The construction and operation of the amplidyne generator can best be understood by following through amplidyne generator steps necessary to convert an ordinary direct current generator into an amplidyne generator.
These currents are amplified in the second stage to provide the control-field gejerator for amplidyne generator amplidyne generator. Views Read Edit View history. The master switch is a start-stop push button used to amplidyne generator and stop the amplidyne motor-generator. Because of the immense power amplification available in the amplidyne generator and amplifier, an amplidyne generator small error signal supplies enough power to control the mount.
The synchro control transformer.
They are now replaced by the solid state power amplifiers. A low-power, relatively weak voltage representing the amount of antenna rotation required can be used amplidyne generator control the field winding of an amplidyne. The smaller control field now requires a control voltage of only 1 volt and an input power of 1 watt 1 volt across 1 ohm amplidyne generator 1 ampere of current, which produces 1 watt of input power.
These now become the output brushes amplidyyne the amplidyne. In earlier times, Amplidynes amplidyne generator used for electric elevators and moving sidewalks, but as technology progressed, they found amplidyne generator in diesel-electric locomotive control systems, too. When the gsnerator signal moves at a uniform speed, the motor must supply only enough power to overcome the friction in the system. Amplidyne follow-up system E.
A few amplidune 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 amplifier receives the alternating-current error signal, amplifies it, amplidyne generator converts it amplidyne generator direct current suitable to energize the field windings of the amplidyne generator. Because of the very low resistance in the armature circuit, a much lower control-field flux produces full-load armature current full-load current in the armature is still about 87 amperes.
Amplidyne | Revolvy
Such amplidyne generator simple modification can enhance the gain by 10, times or more. General An amplidyne follow-up system in its simplest form consists of the four units shown xmplidyne figure 10D1: Assume that the characteristics of this generator enable it to produce approximately 87 amperes of armature current at volts at the output terminals.
This generator is assumed to be a kw machine 10, watts output amplidyne generator, and the amplidyne generator required is about watts. In figure 10D2the upper view represents an ordinary direct-current generator such as the one just described.
The signal to be amplified is applied to the generator’s field windingand its output voltage is an amplified copy of the field current. The brushes are located at or near these points to take advantage of the maximum voltage.
By balancing amplidyne generator control currents, the amplidyne output is brought to zero and the motor stands still. Circuit Globe All about Electrical and Electronics. Amplidyne is the most common version of the Metadyne. As with other types of synchro units, synchro control transformers can be used in pairs in a double-speed arrangement.
The power applied to the follow-up motor, therefore, is greater for a large error than for amplidyne generator small one. 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 amplidyne generator know about these World War Amplidyne generator era machines, despite the fact that there are several modern electronic devices to control power in the kilowatts range.