Electrical Machine Q1.7 1.7 The shaft torque of a diesel motor driving a 100 V DC shunt-wound generator is25 Nm. The armature current of the generator is 16 A at this value of torque. Ifthe shunt field regulator is adjusted so that the flux is reduced by 15%, the torqueincreases to 35NM. Determine the armature current at this new value of torque.

In this question, Find the Armature current at this new value of torque? If flux reduced 15% and…

Answered: 1.7 The shaft torque of a diesel 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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The shaft torque of a diesel motor driving a 100V dc shunt-wound generator is 25Nm. The armature current of the generator is 18A at this value of torque. If the shunt field regulator is adjusted so that the flux is reduced by 15 per cent, the torque increases to 35Nm. Determine the armature current at this new value of torque.
The shaft torque of diesel motor driving 100v DC shaft wound generator is 25NM generator the armature current is 16A at this value of torque .If the shaft field regulator is adjusted such that the flux is reduced by 15%, the torque increases to 35NM , determine the armature current at this new value of torque, the efficiency of the generator, the power loss in the generator.
The shaft torque of a diesel motor driving a 100V DC shunt wound generator is 25Nm. The armature current of a generator is 16A at this value of torque. If the shunt field regulator is adjusted so that the flux is reduced by 15% the torque increases to 35 Nm. Determine the armature current at this new value of torque.
A long shunt compound generator delivers 100 A at 250 V. The armature, shunt field and series field resistances are 0.02 Ohms, 50 Ohms and 0.05 Ohms respectively. If the Break Horse Power (BHP) or the power developed by the shaft torque of the driving engine is 40, determine the stray loss.
A 6-pole, 500-V. wave-connected shunt motor has 1200 armature conductors and useful flux/pole of 20 mWb. The armature and field resistances are 0.5 Ω and 250 Ω respectively. What will be the speed and torque developed by the motor when it draws 20 A. from the supply mains? If the magnetic and mechanical losses amount to 900 W., find (a) useful torque, (b) output in kW, and (c) efficiency at this load.
A four pole DC shunt motor moves at 1000rpm on a 460v supply when taking an armature current of 45A. Annature resistance is 0,400hms, find the torque developed by the motor if the field circuit remains at 460V.
A separately excited D.C motor is rated for a full load torque of 100Nm. For an applied voltage of 240V and for flux (φ) per pole of 30 mWb, the no-load and full load speeds of the motor are 1595 r.p.m and 1195 r.p.m respectively. (a) Find the armature resistance (b) If the applied voltage and the flux per pole are reduced to 200V and 20mWb respectively, Find the corresponding full load speed.
A 500 V shunt motor has an armature resistance of 0.1 ohm shunt field resistance of 125 ohms. Find the resistance of the shunt field regulator to increase the speed from 750 r.p.m, to 1000 r.p.m if the current taken by the motor is 500 A. Assume the magnetization characteristic to be a straight line.
A shunt excited DC motor consumes 8Kw by feeding it from a 500V line and driving a load at 1000RPM. The counter electromotive force generated is 496V, the resistance of the excitation winding is 250Ω and its total losses account for 17% of the absorbed power. Determine: a) The resistance of the armature winding b) The useful torque c) Total copper losses..
A four-pole, three-phase induction motor drives aturbine load. At a certain operating point the machinehas 4 percent slip and 87 percent efficiency. The motordrives a turbine with torque–speed characteristic givenby TL = 20 + 0.006ω2. Determine the torque at themotor-turbine shaft and the total power delivered tothe turbine. What is the total power consumed by themotor?
1. Calculate the no load speed of a DC motor with specs 12V Vdc KE=0.1 and flux of 2Wb 2. For a series motor, what is the effect with the torque if a. 2x the current, b. 2 times the speed, c. 2 times the voltage?
A 50 kW, 220 V, dc shunt generators has an armature resistance including brushes of 0.026 ohms. If the shunt field resistance is 52 Ω. Find the induced emf at rated load.

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