Forward and reverse motor control schmetic
- #Forward and reverse motor control schmetic how to#
- #Forward and reverse motor control schmetic series#
Now let us move to vary the speed of DC motor. Motor can be rotated forward and reverse using 4 transistors only. So in this circuit if Q1 and Q4 are turned ON simultaneously the motor will rotate forward and if Q2 and Q3 are turned ON then motor will rotate reverse. For NPN transistor if we give +Ve input to base it will turn ON and if we give 0 input it will be turned OFF. We all know that transistor works as switch. The circuit replaces the switches with NPN type transistors. 2: Circuit Diagram of H-Bridge built by transistor for controlling DC motor speed and rotation (Caution: care has to be taken that SW1 and SW3 or SW2 and SW4 must not be pressed simultaneously otherwise it will short circuit the supply)įig. So motor gets reverse supply and it will rotate in another direction. Now if SW2 and SW3 are pressed current will flow from +Ve – SW2 – B – A – SW3 – Gnd. Open (release) SW1 and SW4 to stop motor. If SW1 and SW4 are pressed simultaneously then current will flow from +Ve – SW1 – A – B – SW4 – Gnd. Let us see how it gives reverse supply to motor. Such circuit arrangement is known as H-bridge because it looks like letter ‘H’ (H-bridge circuits are most widely used in DC motor drivers). Four switches are connected in between +Ve supply and ground and DC motor is connected in between two switches as shown. The arrangement is shown in right side of figure.
#Forward and reverse motor control schmetic how to#
So next question is how to give reversible supply to motor? The current will flow from motor from B to A and motor will rotate in other direction (counter clockwise – CCW or reverse). Now B is connected with +Ve and A is connected to ground. Now as shown in second figure we change the supply terminals. Now if we connect terminal A with +Ve supply and terminal B with –Ve supply or ground the current will flow from motor from A to B and motor will rotate in one direction – say clockwise (CW) or forward direction. 1: Image showing H-Bridge circuit used for controlling direction of rotation of a DC MotorĪs shown in figure there are two terminals ‘A’ and ‘B’ of DC motor.
#Forward and reverse motor control schmetic series#
Most of mini DC motors have two terminals because they are series type (armature and field windings are connected in series) DC motors. Tell me how to change direction of rotation of DC motor? Then I will explain very simple DC motor controller circuit that changes direction as well as varies the speed of DC motor. First we will see how we can change the direction of motor and then we will see how we can vary the speed of DC motor. This article explains how one can change the direction and speed of mini DC motor using very simple circuit built using readily and easily available handy components.