Speed Torque Characteristics of DC Compound Motor: A schematic of a Speed Torque Characteristics of DC Compound Motor is shown in Fig. 1.18. There are both series and shunt fields…
DC Excitation System Working Principle: In dc excitation system, the system has two exciters—the main exciter (a separately excited dc generator providing the field current to the alternator) and a…
Armature Resistance Control Method of DC Motor: In this armature resistance control method of speed control, reduced speeds are obtained by inserting resistance in the armature circuit. It may be…
Starting of Synchronous Motor and Precautions: As already stated the synchronous motor has got no self starting torque and the motor must first be brought up to synchronous speed by…
DC Series Motor Starter Working Principle: The series motor starter serves the same purpose as the three- and four-point starters employed with shunt and compound wound motors. However, series motor…
Electric Motor Speed Torque Characteristics: A Electric motor speed torque characteristics is defined as the relationship between the speed at which it operates and the torque it develops, ω = f(T).…
Starting and Speed Control of DC Traction Motors: Starting and Speed Control of DC Traction Motors - As already discussed, only series and compound dc motors are suitable for traction…
Traction Motors: Motors Employed in Traction : Earlier, dc series motor was widely used in Traction Motors. It has high starting torque and capability for high torque overloads. With an…