The characteristics of the dc motor four kinds of excitation ways

Dc motor performance is closely related to its excitation mode,dc motor excitation method usually has four kinds:dc separately excited motor,dc shunt motor,dc series motor and dc compound motor.To master the respective features of four ways:1,dc separately excited motor:exciting winding and armature contact without electricity,excitation circuit is made up of other dc power supply.So the field generator stator current is not affected by the armature terminal voltage or armature current.

2,a dc shunt motor,shunt winding ends voltage is the voltage on both ends of the armature,but exciting winding with fine wire coils,the number of turns a permanent magnet motorl ot,so has larger resistance,made by single phase asynchronous motor his exciting current is small.3,the direct current series motor:exciting winding and armature in series,so this kind of motor with the change of the armature current in the magnetic field change dramatically.In order wholesalemotor.blogspot.com to make the field winding does not cause big loss and voltage drop,exciting winding resistance as small as possible,so direct current series motor is usually use coarser wire coils,his less number of turns.4,compound motor:dc motor flux produced by the two winding excitation current.