Please solve sub part B and D Magnetization Curve - 170 kW, 250V, 850 rpm DC ShuntGenerator350300250200150100502 36 75891011 12Field Current (A)Question 1The figure above shows the excitation curve (including residual voltage) of a 170 kw, 250 V DCshunt generator at rated speed of 850 rpm. The generator has negligible (0 2) armatureresistance and a shunt field coil resistance of 50 2. The variable Field Control Rheostat inseries with the shunt field coil has variable resistance in the range of 0- 25 2.Answer the following questions relating to this generator. Show (explain) your work (right),then select an answer from the choices provided.(a)What is the approximate value of the critical field circuit resistance?(1)(ii)(ii)(iv)(v)95 085 075 065 Q55 0(b)What is the induced EMF( Eo) at rated speed with the rheostat set to its minimumresistance?(i)322 V(ii)300 V(i)265 V(iv)(v)250 V50 VWhat is the induced EMF( Eo) at rated speed with the rheostat set to its half wayresistance?(c)()(i)(iii)325 V265 V250 V(iv)(v)245 V220 VWhat is the approximate value induced EMF( Eo) at a field current of 5.6 A and rotorspeed of 630 rpm?(d)()(i)(i)(iv)(v)375 V335 V300 V275 V200 V(e)What is the field current when the induced emf is 328 V and the rotor speed is 935rpm?(1)(i)(ii)8.4 A7.4 A6.1 A(iv)(v)4.8 A3.0 A(f)What is the rheostat resistance settings when the induced voltage is 300 V and thegenerator is turning at 120% rated speed?(1)(i)12.65 Q10.47 QInduced emf - Eo (V)灵

In this solution the concepts related to the DC shunt generator is discussed.

Answered: Please solve sub part B and D

Engineering

Electrical Engineering

Please solve sub part B and D

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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