Dc motor controller speed regulating mode analysis

Dc motor controller as a motor can convert electrical energy to mechanical energy. According to the needs of the load, and its speed can be adjusted in a certain range. Below we said the dc motor controller speed setting ways. 1. Armature voltage control, the use of input armature voltage adjustment, the speed change. 2. Magnetic field control, due to decrease the exciting current, the air-gap flux will be reduced with, to make it speed increase. So you can through the exciting current control for speed control. 3. By dividing the speed access to the armature resistance circuit, the speed of dc motor controller. Above is speed control method of dc motor controller introduces, hope for your help.