ELECTRICAL TECHNOLOGY
WHAT IS DC MACHINE?
The DC machine can be used as either
a motor or a generator. However, applications requiring operation of the DC
machine as a generator are limited, while applications requiring the DC machine
as a motor are commonplace. DC motors are the obvious choice in applications
where DC sources are all that is available(e.g., automotive systems).
One capability that DC machines
possess that induction and synchronous machines do not is precise speed and/or
torque control. Many industrial applications require motors with a high degree
of-flexibility in the control of speed and torque making the DC machine the
machine of choice.
DC generator is a machine which
convert mechanical energy to electrical. The energy conversion is based on the
principal of production of dynamically induced e.m.f. when ever conductor cuts
the magnetic field e.m.f. induced according to Faraday’s law of electromagnetic
induction. This e.m.f. produced current if the conductor circuit is closed.
DC motor is a machine that convert
electrical energy to mechanical energy. Its action is based in the principle
that when current carring conductor is placed in a magnetic field, it
experiences a mechanical force whose direction is given by Fleming’s left-hand rule.
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