Commonly used dc motor are: the permanent magnet dc motor controller,Slotted, slotless, cup type, printing winding), dc motor controller, the hybrid excitation type brushless dc motor controller, dc motor controller, dc torque motor controller, dc: feed servo system of permanent magnet dc motor controller type slotted armature of permanent magnet dc motor controller,Ordinary)。 Spindle servo motor controller: dc excitation type dc motor controller type separately excited dc motor controller in the performance of the permanent magnet dc servo motor controller features: 1. Low speed large inertia 2. Torque big 3. Starting torque 4. Large range of speed, stable operation at low speed, small torque fluctuation of the dc servo motor controller faults: 1. Brush and commutator wear easily. 2. Motor controller of high speed limit, limit 3 application environment. Complicated structure, manufacturing difficulty and high cost
