The following test data was measured for a separately excited DC machine operating at a speed of 1100 rpm with an open circuit armature:FieldCurrentIF [A]ArmatureVoltageVA [V]85The intrinsic resistances are:Field Resistance: Rp = 359Armature Resistance: R₁ = 9.0.1170MagnetismWhat is the magnetism on the machine?kap0.22550.33400.44250.5476• Find the field current, IF, using Ohm's Law.•Find the speed and voltage during testing from the data at this field current.•Convert the speed from N in rpm to w in rad/s.Fill these values into ea = kaow to get the magnetism, kap.0.65270.75440.85530.9553The machine is then connected as a shunt motor to a supply providing 359 V. The motor is used to lift a weight which creates a torque of4 Nm.1.0553

It is given that: Rf=359 ΩRA=9 ΩVt=359 VT=4 Nm

The following test data was measured for a separately excited DC machine operating at a speed of 1100 rpm with an open circuit armature: Field Current IF [A] Armature Voltage VA [V] 0 85 0.1 170 0.2 Magnetism What is the magnetism on the machine? kap= 255 0.3 340 0.4 425 0.5 476 0.6 527 0.7 544 0.8 553 0.9 553 1.0 553 The intrinsic resistances are: Field Resistance: Rp = 359 Armature Resistance: R₁ = 9 The machine is then connected as a shunt motor to a supply providing 359 V. The motor is used to lift a weight which creates a torque of 4 Nm.

The following test data was measured for a separately excited DC machine operating at a speed of 1100 rpm with an open circuit armature: Field Current IF [A] Armature Voltage VA [V] 0 85 0.1 170 0.2 Magnetism What is the magnetism on the machine? kap= 255 0.3 340 0.4 425 0.5 476 0.6 527 0.7 544 0.8 553 0.9 553 1.0 553 The intrinsic resistances are: Field Resistance: Rp = 359 Armature Resistance: R₁ = 9 The machine is then connected as a shunt motor to a supply providing 359 V. The motor is used to lift a weight which creates a torque of 4 Nm.

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...

See similar textbooks

Similar questions

An 8-pole DC machine has a simplex wave-wound armature containing 200 coils of 10 turns each. The resistance of each turn is 0.01 Ω. The flux per pole is 0.004 Wb. what is the internal resistance of the armature in ohms?
The resistance of the field winding(copper wire) of a DC machine is 0.25 ohm at 25°C. When operating at full-load, the temperature of the winding is 75 °C. The temperature coefficient of resistance of copper is 0.00427 per °C at 0°C. Find the resistance of the field winding at full-load.
Q9 / What are the function of brushes , pole and commutator in DC machine
The armature of a d.c. The machine has a resistance of 0.25 ohm and is connected to a 300V supply. Determine the e.m.f. generated when it runs as a generator giving 100 A and as a motor taking 80 A.
An 8-pole DC machine has a simplex wave-wound armature containing 200 coils of 10 turns each. The resistance of each turn is 0.01 Ω. The flux per pole is 0.004 Wb. What is the internal resistance of the armature in ohms? What is the current absorbed by this machine in amperes at the instant it's connected to a 100 Vdc source? What is the internally generated torque produced by the armature of this machine in N-m at the instant it's connected to the 100 Vdc source? With the DC machine connected to the 100 Vdc source, what is the steady state angular speed of the machine in rpm? What is the internally generated voltage of the armature of this machine at steady state in volts?
A 4 poles lap wound, DC machine has 728 active conductors running at 1800 rpm. The flux per pole is 30 mWb. The armature current is 120A, what is the electromagnetic power developed in the armature in kW?
Q2. A 4-pole, wave-wound armature has 72 slots with two coil-sides per slot, each coil has four turns. If the flux per pole is 20 mWb and the armature rotates at 720 rpm, what is the induced emf across the armature? (Ans. 276.48 V)
Q3) In a two-excitation and two-pole machine, the rotor and stator of both poles are prominent relations The inductor of the rotor and stator is as follows: Lss =(0.5 + 0.2cos20) H Lrr =(0.8 + 0.3cos20) H Lsr =0.7coseH The resistance of the windings is zero. If the rotor is in the position 0 =60 ° and flows from the stator A sinusoid with an effective value of 10A passes and the rotor winding is short, medium torque Calculate the impact on the rotor
A lap-winding DC machine has 24 coils, 18 turns per coil, and 4 poles. The average flux density per pole is 1T. The effective length is 40 cm and the armature radius is 10 cm. The armature velocity is 140.2 rad/sec and the armature current is 24 A. The average flux per pole in Wb is: 6.283 0.06283 O 0.6283 0.006283
Draw and explain a typical power curve for a wind turbine and write the definition of the four important terms that are shown in the power curve
A 10 pole lap wound DC armature has a total of 200 conductors each with a current carrying capacity of 10 A. The average induced emf per conductor is 10 V. The power rating of the DC machine is
The induced emf of a dc machine running at 750 rpm is 220 V. The percentage increase in field flux for generating an induced emf of 250 V at 700 rpm would be ?