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A reparality excited dc generator has OCC data at 1200 rmp as below.

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At If = 6 A when loaded at Ia = 50 A, it has a terminal voltage of 230 V at speed of 1200 rpm. Given: Ra = 0.5 Ω.

(a) Determine the armature voltage drop due to the demagnetizing effect of armature reaction

(b) Assuming that this voltage drop in proportional to the square of armature current, determine the field current for a terminal voltage of 230 V at armature current of Ia = 40 A

(c) In part (a) determine the field current equivalent of demagnetization.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M92020540

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