A shunt DC motor rated at 30 HP, 200 V, 1200 RPM, 100 Amperes armature current. The armature resistance of the motor is RA = 0.052 and the field resistance R, =1602. The adjustable resistance in the field circuit Radj is currently set to 405. Due to armature reaction, the flux is reduced by 12% when loaded. The magnetization curve for this motor taken at a speed of 1200 RPM is given in tabular form below: 0 0.1 0.25 0.52 0.75 1.0 1.2 1.5 1.75 2.00 10 50 110 160 235 260 275 290 295 300 If, A EA,V If the motor is operating at its rated conditions: What is the shaft speed of this motor?

A shunt DC motor rated at 30 HP, 200 V, 1200 RPM, 100 Amperes armature current. The armature resistance of the motor is RA = 0.052 and the field resistance R, =1602. The adjustable resistance in the field circuit Radj is currently set to 405. Due to armature reaction, the flux is reduced by 12% when loaded. The magnetization curve for this motor taken at a speed of 1200 RPM is given in tabular form below: 0 0.1 0.25 0.52 0.75 1.0 1.2 1.5 1.75 2.00 10 50 110 160 235 260 275 290 295 300 If, A EA,V If the motor is operating at its rated conditions: What is the shaft speed of this 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...

See similar textbooks

Related questions

Q: shunt dc motor has armature voltage = 150 V, armature field resistance 100 2, nd armature resistance…

Q: 3. A 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors. The flux per…

A: Here DC shunt motor is given and we have to find developed torque and useful torque

Q: A 10 kW, 250 V Shunt motor has an armature resistance of 0.5 ohm and a field resistance of 200 ohm.…

A: To calculate a)full load speed, b) torque developed at full load speed 1158 rpm

Q: A 230 V fed single quadrant chopper has a 40% duty cycle. A separately excited DC motor is…

Q: 4) A dc. ahunt machine while running as generator develops a voltage of 240 V at 1000 rp.m. on…

A: In this question we will find speed and efficiency of motor with given data....

Q: аc sn Int motor runs om a 400 V supply w mature current of 25 eed at which it will r pply when…

Q: Explain the types of DC generators

A: In the question, Explain the types of DC generators.

Q: A d.c. shunt motor is running with certain load. For constant torque, the effect of adding an…

A: As per the guidelines of Bartleby we supposed to answer 1st question only since the 2nd question is…

Q: Q9. A series motor having a series field resistance of 0.25 2 and an armature resistance of 0.15Q is…

Q: A 250 V, 8-poles lap wound D.C. shunt motor has an armatre resistance of 0.5 N and shunt field…

Q: An 8 pole DC shunt generator with 900 wave-connected armature conductors supplies 10ohm at 500 V…

A: To find the answers, we can use the following formulas and calculations:1.1 The flux per pole:The…

Q: 8) A 230 V fed single quadrant chopper has a 40% duty cycle. A separately excited DC motor is…

A: It is given that: Vs=230 VD=0.4km=0.5 VradsRa=2 ΩN=1400 rpm

Q: (1) What is the armature current IA for EA= (A-10)V (2) What is new value of EAnew, at C/5 percent…

A: RA=0.25Ω ;VT=A=436 V ;EA1=A-10=426V ;1 IA1=? for EA=A-10 C=7, ∴C/5=7/5=1.4% decrease ∴ϕ2=0.986ϕ1 2…

Q: A 220V, four pole, wave wound DC series motor has 1000 conductors on its armature. It has armature…

A: DC machines (Generator/ Motor) are the important parts of electrical drives. These machines are used…

Q: Explain the construction of AC serve motor, also draw its diagram.

A: Construction AC servo engines are fundamentally two-stage squirrel confine acceptance engines and…

Q: A 250 V series motor has an armature resistance of 0.2 ohm and a series-field resistance of 0.18…

Q: A 220 V separately excited dc motor takes 20 A and the armature resistance is 1.0 0. If the armature…

A: We need to find out the speed for given motor.

Q: A 45-hp dc compound motor takes 75 A at supply mains. It operates at a speed of 500 rpm. The flux…

Q: An eight-pole, 24 KW, 100 V, DC machine has a duplex LAP-wound armature which has 64 coils with 10…

Q: A 10 kW, 250 V shunt motor has an armature resistance of 0.5 Ω and a field resistance of 200 Ω. At…

A: Back emf of motor=terminal voltage- voltage drop in armature resistance . Back emf of dc motor is…

Q: A 250 V, 4 pole wave wound shunt motor has 650 conductors on its armature. It has armature and shunt…

Q: In squirrel cage induction machine... a) The rotor mechanical speed is equal to the synchronous…

A: When a three-phase supply is provided to the stator of the induction motor the rotating magnetic…

Q: Q5. B. A 4-pole 250-V, d.cl series motor has a wave-wound armature with 496 conductors. Calculate:…

A: This question belongs to electrical machine . It is based on d.c. series motor . This problem is…

Q: A 250 V shunt motor, having an armature resistance of 0.2 ohm draws from the mains a current of 50 A…

Q: 459. The current drawn by a 460 V dc motor of armature resistance 0.5 ohm and back emf 420 V in

A: Given a dc motor with, Input voltage, V = 460 V. Armature resistance, Ra = 0.5 ohm. Back emf, Eb =…

Q: A permanent magnet DC mitor has an armature resistance 1.4 52. When it is supplied by 75-V DC…

Q: hine. OMod pup anh b) In rotating machines, how would the voltages be generated in windings or…

A: Since you have posted the multiple questions so we are supposed to answer the 1st one.

Q: A shunt DC motor is supplied by 520V terminals voltage and is used to supply a mechanical load with…

A: The solution can be achieved as follows.

Q: Write an Introduction about DC Motors.

A: we need to explain DC motor.

Q: A 240 V, DC shunt motor draws 15 A while supplying the rated load at a speed of 100 rad/s. The…

A: Given- Voltage Vt=240 V. Line current I=15 A. Armature resistance Ra=0.5 Ω. Shunt resistance Rsh=80…

Concept explainers

Stator and Rotor Magnetic Field

The stator and rotor magnetic field is the resulting magnetic field generated by a system of coils that are symmetrically aligned. They are supplied with polyphase currents. The magnetic field is generated by poly-phase (two or more phases) current or single-phase current. In the latter case, two field stator windings are supplied and two resulting electromagnetic fields are generated beyond the stage.

Question

A shunt DC motor rated at 30 HP, 200 V, 1200 RPM, 100 Amperes armature current. The armature
resistance of the motor is RA = 0.052 and the field resistance R₁ =16022. The adjustable
resistance in the field circuit Radj is currently set to 40.
Due to armature reaction, the flux is reduced by 12% when loaded.
The magnetization curve for this motor taken at a speed of 1200 RPM is given in tabular form below:
If, A
EA,V
If the motor is operating at its rated conditions: What is the shaft speed of this motor?
0
10
0.1 0.25 0.52 0.75 1.0 1.2 1.5 1.75 2.00
50 110 160 235 260 275 290 295 300
Select one:
O a. Speed n=1200 RPM
O b. Speed n = 1818 RPM
O c. Speed n= 1023 RPM
O d. None

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Given

VIEW

Step 2: Understanding the Effect of Armature Reaction and the Effect of the Adjustable Resistance

VIEW

Step 3: Using the Magnetization Curve and Calculating the Speed

VIEW

Solution

VIEW

Step by step

Solved in 4 steps with 4 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

current - 1=?, and the power factor - cosp =?. 4. An out of balance three phase star connected load has the following complex currents: I₁ = lejº,A, I₂ =le¯6⁰,A and I₁=1e¹j6⁰, A. This load is supplied by a four wire power line from a balance voltage source. Find the r.m.s. value of the neutral current Io =? Wait to th
The relation between armature torque and armature current of a DC motor is Parabolic Linear Inverse Exponential
3. A 4 pole, 250 dc shunt motor has a lap connected armature with 960 conductors. The flux per pole is 2 x 102Wb. Calculate the torque developed by the armature and the useful torque in N-m when the current taken by the motor is 30A. The armature resistance is 0.12 ohm and the field resistance is 125ohm. The rotational losses amount to 825W
Colve asap
Developed torque??
A DC motor should be operated in a strong field which is due to the What happens to if suddenly goes a) nothing, it continues rotating b) it over speeds c) it stops rotating current if moter if rotating to zero. as before
This course EHide blom Clear my choice An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 6 turns per coil. Its rated speed is 3000 RPM. Assume no dead zone Find the constant K and the flux per pole to produce 80 Volts at no-load conditions Select one: a. None Ob. K = 68.86 and flux = 3.33 mWb/pole Oc.K = 68.755 and flux = 3.7 mWb / pole O d. K = 95.5 and flux = 3.7 mWb / pole A peries DC motor has a series-field windino of 25 turns per pole. Its armature resistance in 0,1 2. and its
Reducing the supply voltage so that Vnew = Vold / V3 reduces the maximum torque of the motor so that Tmaxnew= ...Tmaxold . * .... ...
at of estion An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 6 turns per coil. Its rated speed is 3000 RPM. Assume no dead zone Find the constant K and the flux per pole to produce 80 Volts at no-load conditions Select one: O a None O b. K= 68.86 and flux = 3.33 mWb/pole Oc. K= 68.755 and flux = 3.7 mWb/pole O d. K= 95.5 and flux = 3.7 mWb/pole
a 220 V dc shunt motor has armature resistance 0.23 ohm, on load it takes armature current 40 A and turnes at 720 rpm, if the flux of motor is reduced by 10% without changing the load torque . Find the new speed of the motor.
A DC series motor having a resistance of 0.4 ꭥ and runs at 2000 rpm when connected to 250 V supply and drawing a current of 20 A. (i) What resistance must be added in order to limit the speed to 4000 rpm when armature current is 5A? Assume flux varies linearly. (ii) What resistance must be added to limit the speed to 1000 rpm when armature current is 30 A? Assume that the flux at 30 A is 20% more than that at 20A. (iii) At what speed the motor will run if it is connected directly to 250 V supply when the load is such that the current drawn is 30 A?