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Part(a) For a permanent magnet synchronous machine, draw the vector diagram for vector control. Show the rotor flux-linkage, the stator flux-linkage and the stator current vectors on this diagram. [8 marks) Part (b) Draw the vector control block diagram for a permanent magnet synchronous machine and explain its various parts. If the machine is operated with isd = 0, explain why a current control for the d-axis current is needed. [8 marks) Part (0) A 10-pole permanent magnet synchronous machine is operating in steady-state at 1740rpm, the stator current vector in the rotor reference frame is given as: is = 6.3e3127" Amp. The machine's parameters are: R, = 0.361, L, = 4.7mH, Im = 0.057Vs Calculate the magnitude and angle of the stator voltage vector. LUTHINA Part (d) For the machine of part (c), calculate the magnitude and direction of the stator flux-linkage vector. Draw a vector diagram on which show the stator flux- linkage vector in relation to the rotor flux-linkage vector.