Explain the Sub synchronous and super synchronous modes of operation of a three
phase
wound rotor induction motor using suitable Drive. (12)

With Circuit diagram and waveform explain the working of a field oriented controlled

CSI fed induction motor drive for speed control application. 02)

PART 0
Draw neat block diagram and explain V/F method of speed control of VSi fed three
phase
Synchronous Motor drive.
a) Derive the dynamic machine model of a permanent magnet BLDC motor and derive
the equation for electromagnetic torque developed. (5) b) Obtain the dynamic model of
Permanent Magnet Synchronous Motor (PMSM) using flux linkage equations. (4)

Describe the working of a Position Controlled permanent magnet BLDC motor drive

scheme and explain the working of current control loop. (9)