Electrical machines rely on armature windings to convert energy between electrical and mechanical forms. In DC machines , the armature winding sits on the rotor and interacts with the stationary magnetic field to i…
When a DC motor starts from rest, its speed is zero. At this moment, the back electromotive force (back EMF) is also zero. If the motor is connected directly to the supply mains in this condition, a very high current f…
Introduction In many modern applications, electric motors are not just required to rotate in one direction or operate in one mode. They often need to: Run forward and reverse Act as a motor (convert electrical energy to mechanica…
What is an Excitation System? The excitation system is responsible for providing the electrical current that is needed to generate the magnetic field in an alternator (a type of electrical generator). This is necessary becau…
