What is generator compounding?
What is generator compounding?
One means of supplying a stable output voltage is by using a compound generator. The compound generator has a field winding in parallel with the generator armature (the same as a shunt-wound generator) and a field winding in series with the generator armature (the same as a series-wound generator) (Figure 12).
What are the two types of compound generator?
There are two types of compound wound generators, the series field winding and the shunt field winding. There are two windings, one in series with the armature and the other in parallel with it.
What is a DC compound generator?
Compound wound generators have both series field winding and shunt field winding. One winding is placed in series with the armature, and the other is placed in parallel with the armature. This type of DC generators may be of two types- short shunt compound-wound generator and long shunt compound-wound generator.
What is the main characteristic of a differential compound generator?
The differentially compounded dc generator comprises of both shunt and series field windings but their configuration is such that their generated flux cancel each that is contrary to cumulatively compounded generator.
What is over compound generator and where it is used?
Cumulative compound wound generators are generally used for lighting, power supply purpose and for heavy power services because of their constant voltage property. They are mainly made over compounded. Cumulative compound wound generators are also used for driving a motor.
What are the advantages of compound generators?
Thanks to the presence of the features of these two motors in compound DC motors, they can operate even at no load. they can run at some speed within the limits. As a result, a compound motor can be used for approximately all the applications where both series and shunt motor combined can be used.
What is the best description of a compound generator?
In a Compound Wound Generator, there are two sets of the field winding on each pole. One of them is connected in series having few turns of thick wire, and the other is connected in parallel having many turns of fine wire with the armature windings.
What is the difference between long shunt and short shunt compound generator?
Short Shunt compound dc generator is in which only shunt field winding is in parallel with the armature winding. Long Shunt compound dc generator is in which shunt field winding is in parallel with both series field and armature winding.
How does a DC compound generator work?
A DC generator is an electrical machine whose main function is to convert mechanical energy into electricity. When the conductor slashes magnetic flux, an emf will be generated based on the electromagnetic induction principle of Faraday’s Laws.
What is OCC in electrical?
Digital ElectronicsElectronics & ElectricalElectron. The open circuit characteristics (O.C.C) or magnetization characteristics is the curve that shows the relationship between the generated EMF at no-load (E0) and the field current (If) at constant speed. It is also known as no-load saturation curve.
What is the difference between cumulative and differential compound generators?
If flux produced due to both winding is adding in nature, then it is called cumulative DC generator. If flux produced due to both windings is subtractive in nature, then it is called differential DC generator.
Where we can use DC compound generator?
They are used in DC motors where speed control is necessary. They are used as portable generators where low power supply is required. They are used in motorcycles as dynamos, in toys such as remote control cars and in appliances such as electric shavers.
How is the compound DC generator connected?
What are the two types of compound motor?
Compound motors can be divided into two major categories based on the way their field winding is connected to the armature winding and which are Long Shunt and Short Shunt. In the following section, we delve deeper into both of these categories.
Where are Compound motors used?
Application of DC Compound motor ⇒ By compound motor, we get high starting torque and nearly constant speed. Because of that Compound motors are used where we require high starting torque and constant speed. ⇒ A compound motor is used in Presses, Shears, Conveyors, Elevators, Rolling Mills, Heavy Planners, etc.
What is OCC of generator?
The open circuit characteristics (O.C.C) or magnetization characteristics is the curve that shows the relationship between the generated EMF at no-load (E0) and the field current (If) at constant speed. It is also known as no-load saturation curve.
What is OCC and SCC?
Open circuit characteristic (OCC) and Short Circuit Characteristics (SCC) of a Synchronous generator. With the armature terminals open, Ia=0, so Eg = Vt It is thus possible to construct a plot of Eg or Vt vs If graph.
Where are Interpoles located?
The interpoles are connected in series between the armature and series winding. It is physically located beside the series coil in the stator. It is made of wire that is the same gauge as the series winding and it is connected so that its polarity is the same as the series winding pole it is mounted behind.
What is OCC test?
OCC’s Technical Certification Services provides testing support for external business parties including Banks, Clearing Members, Non-Clearing Organizations and Trade Sources.
What are the characteristics of DC compound generator?
The characteristics of DC compound generator is different for series and shunt generator characteristics. The shunt winding can be connected either across the armature only (short-shunt connection S) or across armature plus series field (long-shunt connection G).
What is the difference between a compound generator and shunt generator?
The shunt winding can be connected either across the armature only (short-shunt connection S) or across armature plus series field (long-shunt connection G). The compound generator can be cumulatively compounded or differentially compounded generator.
What is compound wound generator?
– Long & Short Shunt Compound Wound – Circuit Globe In a Compound Wound Generator, there are two sets of the field winding on each pole. One of them is connected in series having few turns of thick wire, and the other is connected in parallel having many turns of fine wire with the armature windings.
What is a flat-compounded generator?
If series winding turns are so adjusted that with the increase in load current, the terminal voltage substantially remains constant, it is called flat-compounded generator. The series winding of such a machine has a lesser number of turns than the one in an over-compounded machine.