14• A 120-V, 2400-rpm shunt motor has an armatureresistance of 0.4 2 and a shunt field resistance of160 2. The motor operates at its rated speed at fullload and takes 14.75 A. The no-load current is 2 A.When an external resistance of 3.6 Q is inserted inthe armature circuit with no change in the torquedeveloped, calculate the motor speed, the power lossin the external resistance, and the efficiency of themotor. Assume that the rotational loss isproportional to the speed. No =146 250EnfiF2400

Answered: 14 • A 120-V, 2400-rpm shunt motor has…

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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Similar questions

Qa/ a- Explain the difference in the Torque-Speed Characteristics of DC Shunt and series Motors. b+ A 120 V shunt motor has the following parameters: Ra = 0.4 0, RF = 120 Q. On full load, the tine current is 19.5 A and the motor runs at 1200 rpm, find the output torque.
a 20kw, 200v dc shunt motor has an electrical efficiency of 86% and an armature resistance of 0.25ohms what is the value of shunt field resistance in ohms
A 200 V dc shunt motor takes a current of 20A on a certain load. R= 12 and Rah= 2002. Find the resistance to be inserted in series with the armature to reduce the speed to 75% of its original value if the load torque is constant.
Question4 A 120-V series motor runs at 2000 rpm at full load and takes a current of 12A. The armature resistance is 0.3 ohms and the series field resistance is 0.2 ohms. A diverter resistance of 0.2 ohms is connected across the series field, and the load on the motor is adjusted. If the motor now takes 20A, what is the new speed of the motor, determine the torque developed in each case.
Final 1A DC shunt motor is rated 10HP, 250V and is connected to 235V source. The armature resistance is 0.2 ohm, the field circuit resistance is 125 ohm and the total rotational losses are 380W. The motor is driving a load, and it draws an armature current of 30A, Calculate the output power. b) 41 d) 6490 6870 7492 7460 Boş birak
A 3-phase 50 Hz I.M. has a rated torque = 16.7 N.M and maximum torque = 40.5 N.M. If its rated speed = 910 R.P.M, the :speed at maximum torque will be %3D R.P.M 578.28O R.P.M 421.640 R.P.M 590.160 None O
A 2 hp 50 Hz 3-phase 220 V delta wired induction motor has a full-load rated speed of 1400 rpm. a) How many poles does the motor have? b) Calculate its rated output torque. c) What is the slip at full load? d) If the current is 6.37 A with a power factor of 0.79 at full load, what is the efficiency of the motor? e) Calculate the torque and approximate speed at ½ load. f) If a variable frequency drive were used to control the speed of this motor, what is the approximate maximum speed for the load from e)? What frequency would the drive be set to? Please answer all subpart either dislike is ready please all subpart in short please
A 550-volt long-shunt compound motor has armature an resistance of 0.815 ohm and a series field resistance of 0.15 ohm. The full load speed is 1,900 rpm when the armature current is 22 amp. (a) At what speed will the motor operate at no load if the armature current drops to 3 amp with a corresponding drop in flux to 88 per cent of the full-load value? (Assume a brush drop of 5 volts at full load and 2 volts at no load.) (b) Calculate the percent speed regulation of the motor.
A 400v series motor working with unsaturated field is taking 60 A and running at 840 rpm. The total resistance of the motor is 0.1 ohm. At what speed will the motor run when developing half-full load torque.
A 500 V DC shunt motor takes 4 A at no-load. The shunt field winding resistance and the armature winding resistance are 250 and 0.2 respectively. Find the efficiency when the motor draws a current of 10 A at full load.
1. A 230 V shunt motor takes a total current of 25 A. If the field winding resistance is 100N and the amature resistance of 0.30, Determine the Current in the armature and Back emf I need all steps , write clear please

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