136x Filetype PPT File size 0.39 MB Source: memberfiles.freewebs.com
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
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