Electrical and Instrumentation Engineering: Unit II: DC Machines
Applications of DC Machines
Generally, the DC machines are used in supplying excitation of an alternator and it is also used in many applications like welding process, variable-speed motor drives and electrolytic and electroplating process.
APPLICATIONS OF DC MACHINES
The
use of electrical energy increases day by day. And because of that, the use of
Tots electrical machines is also increasing.
Generally,
the DC machines are used in supplying excitation of an alternator and it is
also used in many applications like welding process, variable-speed motor drives
and electrolytic and electroplating process.
Small
DC machines are used as a control device such as speed sensing, positioning,
and tracking.
Application of DC Machine as a Motor
The
DC motors are divided into three types; Series motor, Shunt motor, and Compound
motor.
Series Motor
The
series motors are used in the application where high starting torque is
necessary and speed variation is possible.
Example: Vacuum
cleaner, Air Compressor, Cranes, Traction system, etc.
Shunt Motor
The
shunt motor is used in the application where starting torque is not needed more
and running on the constant speed.
Example: conveyer,
Lift, Fans, Lath: machine, Spinning machine, centrifugal pump, etc.
Compound Motor
The
compound motors are used in applications where higher starting with constant
speed is required.
Example:
Rolling mills, Elevators, Conveyer, Presses, etc.
Application of DC Machine as Generator
The
DC generators are classified as Separately excited DC generator, Shunt-wound,
and Series-Wound generator.
Separately excited DC Generator
This
type of DC generator is used for testing in laboratories. Because it has a wide
range of voltage input. It is also used as a supply to DC motor.
Shunt-wound Generator
This
type of generator used to charge a battery and provide excitation to the
alternator. This type of generator also used for lighting purposes.
Series-wound Generator
Series-wound
generators are used in locomotive for providing field excitation current as
well as for regenerative braking. In a distribution power system, it is used as
a booster.
Electrical and Instrumentation Engineering: Unit II: DC Machines : Tag: : - Applications of DC Machines
Electrical and Instrumentation Engineering: Unit II: DC Machines
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Electrical and Instrumentation Engineering
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