Problem 1. A 10-hp, 230-V shunt motor takes a full-load line current of 40 A. The armature and field resistancesare 0.25 2 and 230 2 respectively. The total brush-contact drop is 2 V and the core and friction losses are 380 W.Calculate the efficiency of the motor. Assume that stray-load loss is of 1% of output.

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Answered: Problem 1. A 10-hp, 230-V shunt motor…

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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A Long Shunt Compound DC Generator supplies 90-amp at 120-volt. Series field resistance of 0.03-ohm, armature and brush contact resistance is 0.04-ohm, shunt field resistance of 46- ohm and compensating resistance of 0.009-ohm, the Iron and friction losses mount to 458- watts. Find the over all efficiency.
. A Short Shunt Compound DC Generator supplies 100-amp at 110-volt. Series field resistance of 0.04-ohm, armature resistance is 0.05-ohm, shunt field resistance of 57- ohm. Iron and friction losses mount to 852-watts. Find the power input and the over all efficiency.
A shunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates from a 130 V DC power line. The resistance of the field windings, R. is 208 n. The resistance of the rotor, R,, is 4.90 1. When the motor is running, the rotor develops an emf E. The motor draws a current of 4.46 A from the line. Friction losses amount to 45.0 W Part C Compute the emf E. • View Available Hint(s) Tematates Symbols undo redo Tese keyboard shortcuts Help V Submit Part D Compute the rate of development of thermal energy in the field windings. Express your answer in watts. > View Available Hint(s) Templates Symbols undo redo Teset keyboard shortcuts Help Pan,windings = Figure W K 1 of 1 Submit Part E Compute the rate Pin.rotor of development of thermal energy in the rotor. R ER, Express your answer in watts. > View Available Hint(s) Templates Symbols undo redo teset keyboard shortcuts help Pinrotor=
(c) What are the principle characteristics of DC series motor and DC compound motor, and what are its uses?
I need the answer as soon as possible
4. A shunt motor designed to operate at 115 V, has an armature resistance is 0.12 ohms and the motor is taking 60 A in armature current at full load. Determine the value of the external resistance to be inserted in the armature circuit so that the armature current shall not exceed twice its full load value at starting. A. 0.838 ohm C. 0.667 ohm B. 0.919 ohm D. 0.733 ohm
A 230 V DC Shunt motor runs at 700 r.p.m. and takes armature current of 40 A. Find resistance to be added to the field circult to increase speed to 1200 r.p.m. at an armature current of 60 A. Assume flux proportional to field current. Armature resistance = 0.12 n and field winding resistance is 115h
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.
Q15. A series-wound motor is connected to a d.c. supply and develops full-load torque when the current is 30 A and speed is 1000 rev/min. If the flux per pole is proportional to the current flowing, find the current and speed at half full- load torque, when connected to the same supply.
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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