![]() When we apply DC supply to the motor it starts to rotate the shaft but we cannot control its RPM (Revolutions per minute), but when we apply PWM signal as a supply to the DC motor depends on the PWM duty cycle we can control DC motors RPM. A common technique for doing this is to use PWM (Pulse Width Modulation). The speed of a DC motor can be controlled by varying its input voltage. Pulse width modulation is a digital technique for coding digital data into a pulsating signal which looks like a square wave. Pulse width modulation is an effective way to implement motor speed control. H-Bridge – For controlling rotation direction.This can be achieved by combining these two techniques. Apart from these techniques, to have complete control over the DC motor, we have to control its speed and rotation direction. Controlling the speed of the dc motor can be done in different ways like using a potentiometer and also by a controlled current to the armature. #H bridge gate driver circuit driver#Here we design a simple DC motor speed control PWM circuit by using IC 555 and motor driver IC L293D. It can control both the speed and spinning direction of two DC motors. Now one of the easiest and most inexpensive ways to control DC motors is to use L293D Motor Driver IC. Like if you are planning on assembling a robot, you will eventually need a DC motor controlling circuit. The DC Motor is used in many applications, and some applications require speed control of the DC motor sometimes it requires rotation direction control. It works on the principle of Lorentz force by which the current-carrying conductor in a magnetic field experiences a force hence the conductor moves in the direction of force called Lorentz force. In this tutorial, we are going to make a “DC Motor Speed Control PWM circuit”.Ī DC motor is an electro-mechanical device that converts direct current into mechanical energy using the rotation of a shaft. ![]()
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