the role of the servo motor controller is the input voltage signal,The control voltage)Into a shaft angular displacement or angular velocity output, in automatic control system as actuators, so also known as force motor, servo motor, its biggest characteristic is: is rotor rotating immediately when the control voltage, no control voltage rotor immediately halt. Axis gubernaculo celeritate determinatur directionem magnitudinem imperium voltage. Dividitur in duo major genera AC et DC servo motor controller. Infra ego dabo omnes explicare DC servo motor controller. Dc servo motor controller: 1, the basic structure of the traditional dc servo electric motor essence is common dc motor capacity is small, he wound type and permanent magnet type two kinds, the structure and common dc motor in the same structure. Cup armature DC Motor Rotor factus de non-magnetica materiae cavum cylindrici calicem, rotor est levior et momentum inertiae parva, celeri responsum. In rotor factus est mollis magnetica materiae inter intus et extra de stator rotating, aer gap est maior. Brushless DC servo motricium usura electronic commutatione pro traditional penicillo et commutator, ut eam certiorem. Et Stator Core structuram et communi DC motricium basic idem, quod embedded cum multiphase curva, rotor permanens magnes materiae. II basic opus principium de traditional DC servo motricium scriptor basic opus principium et commune DC motricium sunt prorsus idem, freti in effectu armature current et aere gap fluxo motricium. Usually capere armature potestate modus, id est sub conditione excitationis intentione immutat, mutantur armatura voltage ad adjust celeritate. Armature voltage minor celeritas inferior; ARMATURE VOLTAGE est nulla, motricium Motor. Ob armature voltage est nulla ARMATURE Current est nulla, etiam non producendum electro torque motricium, ibi erit nulla 'gyrationis.