How are DC motors controlled?
Thus, the speed of a DC motor can be controlled in three ways: By varying the supply voltage. By varying the flux, and by varying the current through the field winding. By varying the armature voltage, and by varying the armature resistance.
What is the working of DC motor?
A DC motor is an electrical machine which converts electrical energy into mechanical energy. The basic working principle of the DC motor is that whenever a current carrying conductor places in the magnetic field, it experiences a mechanical force.
Which is the simplest way to control a DC motor?
An H bridge circuit is one of the simplest methods to control a DC motor. Figure 1 below shows a simplified circuit diagram of the H Bridge: Figure 1: H bridge circuit for DC motor direction control. There are four switches controlled in pairs (1 & 4, 2 & 3), and when either of these pairs are closed, they complete the circuit and power the motor.
How is a DC motor speed controller circuit inspired?
The above circuit was inspired from the following motor driver circuit which was published long back in elecktor electronic India magazine. The first motor control diagram can be much simplified by using a DPDT switch for the motor reversal operation, and by using an emitter follower transistor for the speed control implementation, as shown below:
Are there any controllers for brushed DC motors?
There are controllers for brushed DC motors, brushless DC motors, as well as universal motors, and they all allow operators to set desired motor behavior even though their mechanisms for doing so differ. Our articles on shunt DC motors, series wound DC motors, and brushless DC motors provide detailed explanations on how DC machines function.
How does electronic commutation work on a DC motor?
This replaces the conventional mechanics comprised of brushes rubbing on the commutator to energize the windings in the armature of a DC motor. Electronic commutation provides greater efficiency over conventional DC motors with improvements of 20 to 30% for motors running at the same speed and load.