cessControl) Question 3 (1 point) + ww a www Controller ww R Op amp b Rin + Rin ww C Power amp O 0:54 dc tachometer/generator dc motor d Feedback loop Load For the above Control Loop diagram, indicate the letter which best corresponds with the Error Signal: a Word Q Search W 00 ENG US #
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- MCQ questionIf the rotor of the receiver in a torque synchro system was prevented from aligning with the transmitter rotor, then ___________.a. a high current will flow in the stator windingsb. the transmitter will turn to align with the receiver rotorc. the receiver and transmitter will overheat and produce a humTo calculate the armature current of a synchronous generator, you do NOT need to know itsA. kilovolt-amperes.B. power factor.C. voltage.D. losses. Note: I have doubts if it is the letter A or the letter D, can you help me in this question, thanks.Why is the shunt field circuit never allowed to open while operating?
- Q1) Answer the following: - 1-E = (V – laRa ) then N = 2-The consist of and N 3-In a the shunt field winding is connected in parallel with the armature winding only. Series Field Shunt Field R Re 4- The Vo is adjusted by adding This increase slope of this line causing the operating point to shift at lower voltage. No Load V prime mover certain speed. 5-for wave wound generator A= , and for lap wound generator A= 6-The is made up of insulated 7- The connection arrangement to obtain shunt or series excited generators, the field winding is disconnected from the machine and connected across an external supply. is as shown in the figure below. For UC No Supply Load field winding constant speed wwwGiven the problem in the picture, answer the following: -What is the shunt field current? * -Calculate the armature current. * -Determine the generated voltage. * -What is the speed of the machine?Question 2 (a) Figure Q2(a) shows the percentage differential relay used for the protection of an alternator winding. The relay has minimum pickup current of 0.15 A and a percentage slope of 12%. A high resistance ground fault occurs near the grounded neutral end of the generator winding with the current distribution as shown in Table Q2(a). Identify with reason whether the relay will operate. I I CB wiłu 400/5 400/5 iz mhu Figure Q2(a) Table Q2(a) Student Name I2 (A) ID (A) 370 300
- A single phase synchronous generator was open-circuit and short-circuit tested. During an opencircuit test of the synchronous machine, nominal voltage of 220 V was obtained for the fieldcurrent of IfNL = 6 A while for short-circuit test, rated current of 8 A was reached for the fieldcurrent of IfSC = 5 A. The synchronous generator is connected to rated voltage of 220 V.Assuming negligible armature resistance determine: a. internal voltage E (behind Xs), under rated current and power factor of 0.8 lagging;b. for the internal voltage from (a) determine the steady-state stability limit.Note: Xs is ratio of IfSC / IfNL20.a. A capacitive sensor is used to detect the presence of _______ objects.A. ferrousB. nonmovingC. nonconductiveD. magnetic20.b. A three-phase motor can be made to run backwards byA. connecting a resistor in series with the armature.B. reversing the control voltage connections.C. reversing three of its power leads.D. reversing two of its power leads.Q1 • The D.C shunt generators consist of two parts, • The conditions for voltage build-up in D.C shunt generator are • The • Can be controlled the speed of de shunt motor, by changing ------- at constant and- and --- must be constant throughout the test of no load D.C shunt generator. -----------