What is a DC shunt generator?
A shunt generator is a type of direct current electric generator in which field winding and armature winding are connected in parallel, and in which the armature supplies both the load current and the field current.
When was the DC generator last used?
Until about the 1960s motor vehicles tended to use DC generators (dynamos) with electromechanical regulators. Following the historical trend above and for many of the same reasons, these have now been replaced by alternators with built-in rectifier circuits.
What are the characteristics of DC shunt generator?
Characteristics of DC Shunt Generator To build up voltage of a shunt generator, the generator is driven at the rated speed by a prime mover. Initial voltage is induced due to residual magnetism in the field poles. The generator builds up its voltage as explained by the O.C.C.
Who invented DC shunt generator?
Early 1830 Faraday worked on the process that is related to electromagnetic fields. He discovered a theory that is basic behind the working of a generator. Later several discoveries have been done that led to the invention of some other generators, those are the shunt, series, and compound type.
How does DC shunt generator work?
Most of the shunt DC generators work on the principle of self-excitation. Following a positive feedback like action, the flux in a self-excited DC generator, builds up from a small amount of residual magnetism present in the field poles. In self-excited DC generators, the field winding is connected across the armature.
When was the DC generator invented?
Faraday had created the first transformer in August 1831. A few months later he designed and made this simple piece of apparatus based on his ring, developing the first ever electric generator.
Where are DC generators used?
Applications of DC Generators 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.
What is magnetic characteristics of DC shunt generator?
The open circuit characteristics for a DC generator are determined as follows. The field winding of the DC generator (series or shunt) is disconnected from the machine and is separately excited from an external DC source. The generator is run at fixed speed (i.e. rated speed).
What are the internal and external characteristics of DC shunt generator?
AC curve is showing the external characteristic of the shunt wound DC generators. It is showing the variation of terminal voltage with the load current. Ohmic drop due to armature resistance gives lesser terminal voltage the generated voltage. That is why the curve lies below the internal characteristic curve.
What is the principle of shunt?
Construction and Working Principle The working principle of a DC Shunt Motor is, whenever a DC motor is turned ON, then DC flows throughout stator as well as the rotor. This current flow will generate two fields namely pole as well as the armature.
