Electrical Engineering ⇒ Topic : Ward-Leonard System.

Ward-Leonard System. This method of control not only gives a wide range of operating speeds, but reduces to the very minimum the waste of energy that may take place at starting and stopping.

Fig. (a) shows the schematic arrangement of Ward-Leonard method.

                                                              Fig. (a) Ward-Leonard method.

M = main motor whose speed is to be controlled

G = separately excited generator which feeds the armature of the motor M

E = an exciter (a small shunt generator) which provides field excitation to the generator and motor M

M' = driving motor - a constant speed motor which drives G and E.