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SPEED CONTROL OF DC
MOTORS
There are mainly two ways of controlling speed of DC motor
1. varying the supply voltage
2. pulse width modulation
First method is by varying the supply voltage, ie voltage across the
motor. But this is a somewhat a tough task because
we mostly microcontrollers to vary the supply
voltage and to generate variable supply voltage we should
go for analog circuit, then come analog to digital conversion and
other
steps which makes the task tedious. See the line follower project to see
how to vary supply voltage to switch motor from one
speed to another. But the switching time of motor
is less in this case compared to PWM case.
Switching speed of the motor is the time taken for the motor to change
from one speed to another.
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