The armature resistance of a compound direct current motor connected with a short shunt is 0.150, the series winding resistance is 0.25 n and the shunt winding resistance is given as 8000. The armature of the DC motor with 120 terminal voltage is 1400 rpm. If it draws 12 amps from the motorterminals on the return path, the torque produced by the motor and Find the efficiency of the engine. Rs Ra Ea | ww ww

The armature resistance of a compound direct current motor connected with a short shunt is 0.150, the series winding resistance is 0.25 n and the shunt winding resistance is given as 8000. The armature of the DC motor with 120 terminal voltage is 1400 rpm. If it draws 12 amps from the motorterminals on the return path, the torque produced by the motor and Find the efficiency of the engine. Rs Ra Ea | ww ww

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

A direct current shunt motor develops 10 HP at 8000 RPM when drawing a line current of 40 A at 220 V. Find the efficiency at this load and the useful torque.
Sketch the torque versus speed characteristic for a series-connected dc motor.
A six pole induction motor is connected to a 25Hz supply and at full load the rotor emf makes 105 complete cycles in 2 minutes. Find the percentage slip.
A 220 V shunt motor takes a current of 20A. Resistance of the shunt field is 200 ohm and of the armature 0.3 ohm. Find the armature current and back emf.
A 1200 rpm, 700V Series DC motor has an armature resistance of 20 and the field resistance of 90. If the rotational losses is 450W and the efficiency is 71% , the output power of the motor in Kwatt is
A 100 V DC separately excited motor has armature resistance 2 ohms and voltage constant of 0.6 V /rad/s. The field coil is excited by a 28 V DC supply and the resistance of the field coil is 2.8 Kohms. If the torque constant is 50 Nm/s, demonstrate how you would calculate the speed of the motor if the required torque is 20 Nm.
I need the answer as soon as possible
2.. A three-phase 60 Hz asynchronous motor runs at 890 rpm at idle and 840 rpm at full load. ww w w www wwww a) How many poles does this motor have? b) What will be thę slip at nominal load? c) What happens if the nominal load is slipping at half? www. d) What is the electrical frequency of the rotor at half the nominal load? wwww
459. The current drawn by a 460 V dc motor of armature resistance 0.5 ohm and back emf 420 V is -
Speed control of a 140 V, 1.68 kW DC motor single phase thyristor full wave AC-DC It is made by the converter. AA supply voltage 220 V (rms) Is 50. In the converter It is assumed that there is no loss. The armature resistance of the DC motor is = 0.417 Q. Very a large inductance is connected in series with the motor. The motor voltage constant is = 0.0964 V/rpm. The motor can be considered as a permanent magnet DC. According to this, a) Draw the driver (converter-motor) power circuit. b) Calculate the nominal current of the motor. c) Supply voltage, supply current, converter output voltage for ignition angle a = 30 ° and Draw the waveforms for the converter output current. d) = 950 rpm and for nominal current, d1) The firing angle of the converter, d2) Effective value of supply and thyristor current, d3) Supply power factor, calculate.
A 200 V D.C. shunt motor takes 20 A at rated voltage and runs at 1000 r.p.m. Itsarmature resistance is 0.1 ohm. Calculate the value of additional resistance requiredin the armature circuit to reduced the speed to 800 r.p.m when the load torque isindependent of the speed.Ignore the field current. (Ans.1.98 ohm)
1. What is a linear power supply? 2. What are the advantages and disadvantages of a linear power supply? 3. What is switch mode power supply? 4. What are the advantages and disadvantages of switch mode power supply? 5. What are the different types of switch mode power supply?