Speed control of dc motor in tamil

Speed control of dc Shunt motor Speed Control of D.C. Motors The relationship given below gives the speed of a D.C. motor. The above equation shows that the speed depends upon the supply voltage V, the armature circuit resistance Ra, and the field flux Ф, which is produced by the field current. In practice, the variation of these three factors is used for speed control. Thus, there are three general methods of speed control of D.C. Motors. Resistance variation in the armature circuit: This method is called armature resistance control or Rheostat control. Variation of field flux Ф This method is called field flux control. Variation of the applied voltage. This method is also called armature voltage control. Thank You for watching