Regulate the field voltage
Reduce the armature current
Control the armature reaction
Smooth operation of motors
Cotton
Bamboo
Fiber glass
Leatheroid paper
90 Degree Centigrade
105 Degree Centigrade
120 Degree Centigrade
155 Degree Centigrade
DC series motor
DC shunt motor
Differential long shunt compound motor
Differential short shunt compound motor
DC differential compound motor
DC cumulative compound motor