## Question

###### Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronou...

Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable.x,-457 Ω at a--2m50 rad/s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable .Х.: 1.3 ถ. X.. 457 at a-.. 2 50 rad /s Find a) Find the back-EMF voltage E, current I, and torque angle δ for both machines at the rated power, voltage and speed with unity power factor. b) If machine 2 is excited with the rated current, determine the maximum motoring torque and the corresponding current angle. c) Find the current l and power factor pf at rated power if Machine #2 is operated as a reluctance machine (E-0) with rated voltage excitation at rated speed

## Answers

E,エ achine エ= 350A. 3300 -10-O 1905 XO_ 350X4.5 1599.5 1905 905 3 Y =&a 船-uo.olt 350 x 6s[40.013)-268.as A 12圢a osp 175),52V gin ad 135.52メ1905 sin (1905产(13-457) pouenpw to aluevewave wucu\ Value, ten (2566650.5)--CtX 399 4920, 6 x 199 -46a3 nニ9.55 ,3x106

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