Dc speed governing how to do

Dc speed regulation is mainly divided into two small electric fan motor kinds:one kind is the armature voltage adjustment,change the armature voltage,is to adjust the rotor current,high voltage in the armature is big,current through the coil rotation torque is big,Particular way is:1,in the series resistance of the armature circuit,and the change of resistance value;2,change the armature circuit voltage,generally USES the rectifier power supply.A change in excitation voltage.The speed is also called weak electricalmotor1.blogspot.com magnetic speed control,which is in,normally adopt the method of changing the armature voltage adjusting speed,when the above methods can not meet www.facebook.com/guohong.trading the motor lamination requirement of the speed,can change the excitation voltage,speed,when the excitation current is lower,the speed of the motor.Particular way is:1,in the excitation circuit of series resistance,change of resistance value;2,change the excitation circuit of voltage,generally USES the rectifier power supply.