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How to control speed of DC motor with AC power?
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Answer Posted / j.senthamizh
First we should be convert ac into dc using rectifier. Dc
motor speed control method classified into two 1.armature
control 2.field control . we are using armature control
method motor speed can be control below rated speed.or
using field control method the motor speed is above rated
speed. most people using armature control method because
field control method is dangerous than armature control
method.we are using field speed control at motor is running
condition and now field is open which times motor running at
dangerous speed. at the time motor bearing and shaft is
affected this condition.
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