A very simple DC motor speed controller circuit can be constructed using
a LM317 voltage regulator integrated circuit. This DC motor speed
controller can be used for speed control of mini drills or for other
small DC motors. This motor controller circuit will provide a large
output current. The maximum output current from the secondary turns of
the transformer shout provide 1.5 times of the maximum DC output
current. The output voltage and the speed (rpm) is set by the P2
variable resistor.
DC Motor Speed Controller using a LM317:
As soon as the current drawn exceeds a certain value, T2 will be
switched on. This results in a base current for T3 so that R5 is in
parallel with R6. This automatically raise the output voltage to counter
a threatened drop in rpm. The moment at which this action occurs is
set by P1.
DC Motor Speed Controller using a LM317:
DC Motor Speed Controller using a LM317
Reviewed by SYLVESTER ANWAR MASHI
on
06:25
Rating:
Reviewed by SYLVESTER ANWAR MASHI
on
06:25
Rating:
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