Content
    • Introduction
    • Elementary DC machine
    • Voltage and Torque Equations
    • Basic Type DC Machines
    • Dynamics characteristics of Magnet 
      Permanent and Shunt DC Motor
                                                        2
                     Introduction
    • DC machines application not widely used
    • DC generator is replaced by rectifier
    • DC Motor is still used in lower power :
       –Shunt DC Motor
       –Permanent Magnet DC Motor
    • Brushless DC motor becomes popular and 
      widely used in electric vehicle.
                                                        3
              Elementary of DC Machine
     • Stator coil as field winding  source of flux
     • Rotor coil as armature
                                                               4
                  Voltage Equation
     Voltage equation for field winding and rotor coil
     Flux linkage :
     Mutual inductance winding between field winding and armature  as a function of Θr :
                                     Θr = 0, π, 2 π, ........
                                      L= Constant
                                                        5
     Open circuit voltage
                                                        6