What is amplidyne in control system?

An amplidyne comprises an electric motor which turns a generator on the same shaft. Unlike an ordinary motor-generator, the purpose of an amplidyne is not to generate a steady voltage but to generate a voltage proportional to an input current, to amplify the input.

What is amplidyne and metadyne?

Amplidyne is a special purpose DC generator. A metadyne is a DC electrical machine including two pairs of brushes. It consists of a motor & a generator. It includes sets of brushes. It provides huge DC currents.

What is metadyne generator?

A metadyne is a direct current electrical machine with two pairs of brushes. It can be used as an amplifier or rotatory transformer. It is similar to a third brush dynamo but has additional regulator or “variator” windings.

What is Rosenberg generator?

The Rosenberg generator is normally used for train lighting. This generator is very much similar in construction as that of Metadyne generator. It also consists of four brushes located as shown in the Figure. The Rosenberg generator normally does not have the compensation winding.

How does a magnetic amplifier work?

A magnetic amplifier is an electromagnetic device that amplifies electrical signals utilizing a transformer’s core saturation principle, and the core non linear property. It consists of an iron core with two or more coils wound around it.

What is a cross field generators?

The cross-field machines are special DC machines having an additional set of brushes on the direct-axis or d-axis. This arrangement of brushes enables the use of armature MMF to provide most of the excitation and achieve high power gains.

What is metadyne control method?

The main function of a metadyne is to change the input of stable voltage into a stable current and uneven voltage output. They are used to control large guns and controlling the speed of electric trains (underground). It can be also used as a rotary transformer/an amplifier.

Is metadyne open loop control system?

Is a closed loop system.

What is Rosenberg Dynamo?

The Rosenberg generator is very similar to the Metadyne generator, both in its construction and its electrical connection. It generally does not have a compensation winding, so that the whole of the armature reaction opposes the initial excitation.

What is double battery parallel block system?

Ans: Working of Double Battery Parallel Block System in Train Lighting: 1. When train is stationary or runs slowly, generator contacts B1 and B2 are open and both batteries supply the load through closed contacts L1 and L2, short circuiting lamp resistance D as shown in following figure.

How do you amplify a magnetic field?

Liquid sodium agitated gently in a rotating tank can significantly amplify a magnetic field.

What is a magnetic power supply?

Magnet power supplies place special requirements on control accuracy and load regulation. Thus, different Heinzinger power supplies are optimized for use as power supplies for magnets. The power supplies provide high-precision DC voltage with excellent current stability and extremely low ripple.