Dc Motor Speed Controller Circuit

The proposed circuit can be considered almost a perfect dc motor speed controller.

Dc motor speed controller circuit.

A pwm circuit based on timer ne555 is the heart of this circuit. This motor speed controller uses a single ic lm1014 to control the speed of a dc motor. And the way the pwm signal is employed to regulate the dc motor speed. But in practically higher voltage and lower voltage isn t that sort of possible so during this case we use another sort of method which is named pwm better.

Dc motor may be a purely inductive load so if you would like to regulate the speed of the dc motor then we ve to upper lower the voltage for higher lower speeds. When the wiper arm of potmeter vr1 is in top position capacitor c1 charges through r1 r2 and d1 and produces a pulse train at the output of ic1 with long negative and short positive pulse widths. The ic then increases the motor voltage so that the original speed is recovered. P1 potentiometer varies the speed of the motor.

It is basically a pwm pulse width modulated motor driver that incorporates two separate stages for the generation of the pulses. In addition to controlling the motors speed its direction of rotation can be also changed using this circuit. On the other hand when the wiper arm of vr1 is at the bottom position c1 charges through r1 r2 and vr1 and discharges via r2. It senses the increase in the motor current when the rotation of the motor slows down due to a load.

Therefore the motor speed is slow. 3 easy to build speed controller circuits for dc motors are presented here one using mosfet irf540 second using ic 555 and the third concept with ic 556 featuring torque processing. A simple dc motor controller circuit using ne555 is shown here. Mainly we are getting to find out how the circuit works and what s about the pwm signal.

Dc motor speed controller circuit. Many dc motor speed control circuits have been published here but this is the first one using ne555 timer ic.