A-3, -252,Terminal voltage = 600V, Full load torque = 21Nma. Calculate the armature current at full load torque.b. Calculate the starting current. Show how you can reduce the starting current by 80%.12-3. A dc, separately excited motor has a load torque of 140Nm and a frictional toof 10Nm. The motor is rated at 240V. The armature resistance of the motor is 192.motor speed at the given load is 600rpm. Ignore the field losses and calculate the motorefficiency.2-4. A dc series motor has an armature current of 10A at full load. The motor terminalvoltage is 300V. The armature and field resistances are 29 and 30, respectively. Themotor speed at full load is 250rpm. Calculate the starting torque of the motor.2-5. A 1000V, 50hp compound motor runs at a speed of 750rpm at full load. Thearmature, series, and shunt field resistances are 0.50, 12, and 2000, respectively. Themotor efficiency at this condition is 80%. Calculate the motor's starting current.2-6. A 220V, 1500rpm, 11.6A (armature current) separately excited motor is controlledby a single-phase, full-wave SCR converter. The armature resistance of the motor is29. The ac source voltage is 230V(rms) 60Hz. Enough filtering inductance is added toensure continuous conduction for any torque greater than 25% of the rated value. Youmay ignore the rotational losses. What should be the value of the firing angle(triggering angle) to drive a mechanical load of ated torque at 1000rpm?2-7. A 600V, dc shunt motor has armature and field resistances of 1.59 and 600N,respectively. When the motor runs unloaded, the line current is 3A, and the speed is1000rpm.a. Calculate motor speed when the load draws an armature current of 30A.b. If the load is constant-torque type, what is the motor speed when 39 resistance isadded to the armature circuit?c. Calculate the motor speed if the field is reduced by 10%.2-8. A dc shunt motor drives a centrifugal pump at a speed of 1000rpm when theterminal voltage and line currents are 200V and 50A, respectively. The armature andfield resistances are 0.10 and 10092, respectively.a. Design a starting resistance for a maximum starting current of 120A in the armaturecircuit.b. What resistance should be added to the armature circuit to reduce the speed to800rpm?c. If the terminal voltage is reduced by 25%, what is the speed of the motor?12-9. A dc, separately excited motor has an armature resistance of 152. When a dc supplyof 100V is applied to the motor, the armature current is 4A and the motor speed is300rpm. A half-wave SCR converter is designed to control the motor speed. The supplyvoltage is 120V(rms), and the triggering angle of the converter is adjusted to 60°. Whenthe motor is loaded with a constant-load torque of 10Nm, the conduction period is 175°.Assume that the field current is constant.a. Calculate the average speed of the motor.b. If the triggering angle is 35° and the average speed is 300rpm, what is the conductionperiod of the motor?BAEMINc. A full-wave SCR converter is designed for the same motor. If the triggering angle is50° and the conduction period is 120°, what is the speed of the motor?d. A sufficiently large inductance is added in series with the armature circuit of themotor described in (c). Calculate the minimum triggering angle of the SCR to run themotor at a speed of 100rpm with continuous armature currentAD BAEMIN - Ứng Dụng Giao Đồ ĂnMỞ(-)

As per the guidelines of Bartleby we suppose to answer first question only since the remaining…

2-3. A dc, separately excited motor has a load torque of 140Nm and a frictional to 1 of 10Nm. The motor is rated at 240V. The armature resistance of the motor is 192. motor speed at the given load is 600rpm. Ignore the field losses and calculate the motor efficiency.

2-3. A dc, separately excited motor has a load torque of 140Nm and a frictional to 1 of 10Nm. The motor is rated at 240V. The armature resistance of the motor is 192. motor speed at the given load is 600rpm. Ignore the field losses and calculate the motor efficiency.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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