Types Permanent Magnet Synchronous 
          motors
  1.Surface Mounted-PMSM
      Projecting type 
      Inset type
  2.Interioror Buried-PMSM
     Types of Permanent Magnet 
       Synchronous motors
  1.Surface Mounted-PMSM
      Projecting type 
      Inset type
  2.Interioror Buried-PMSM
                Types of Permanent Magnet 
                        Synchronous motors
      Based on nature of voltage induced in the stator
       classified as
      Sinusoid ally excited PMAC:
      •  Stator has distributed winding.
      •  Stator induced voltage has sinusoidal waveform.
      Trapezoid ally excited PMAC:
      •  Stator has concentrated winding.
      •  Stator induced  voltage has trapezoidal waveform.
            Speed control of sinusoidal PMAC
      •  The speed of the PMAC motor is controlled by feeding them 
         from variable frequency ,voltage and current.
      •  They are operated in self controlled mode.
      •   In closed loop control ,current regulated VSI is used.
      •  The inverter is operated to supply motor three phase currents 
         of the magnitude and phase commanded by reference currents 
         isa,isb and isc which generated by a reference current 
         generator.
      •  The stator current templates for the three phases are generated 
         by the rotor position sensors in such a way that δ = π/2
       
   Speed control of sinusoidal PMAC