Dc Motor Speed Controller 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.

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. The ic then increases the motor voltage so that the original speed is recovered. In addition to controlling the motors speed its direction of rotation can be also changed using this circuit. P1 potentiometer varies the speed of the motor.

Mainly we are getting to find out how the circuit works and what s about the pwm signal. A circuit which enables a user to linearly control the speed of a connected motor by rotating an attached potentiometer is called a motor speed controller circuit. It is basically a pwm pulse width modulated motor driver that incorporates two separate stages for the generation of the pulses. This motor speed controller uses a single ic lm1014 to control the speed of a dc motor.

An external variable dc voltage source is effectively translated into a varying pwm signal. 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. And the way the pwm signal is employed to regulate the dc motor speed.

Therefore the motor speed is slow. 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. It senses the increase in the motor current when the rotation of the motor slows down due to a load. The proposed circuit can be considered almost a perfect dc motor speed controller.

A simple dc motor controller circuit using ne555 is shown here. Dc motor speed controller circuit.