What resistance should be added to the armature current

Assignment Help Electrical Engineering
Reference no: EM13247607

A dc shunt motor drives a centrifugal pump at a speed of 1000rpm when the terminal voltage and the line currents are 200V and 50A, respectively. The armature and field resistance are 0.1 ohm and 100 ohm respectively.

A.)Design a starting resistance for a maximum starting current of 120A in the armature circuit.

B.)What resistance should be added to the armature current to reduce the speed to 800 rpm?

C.)If the terminal voltage is reduced by 25%, what is the speed of the motor?

Reference no: EM13247607

Questions Cloud

Calculate the triggering angle for the speed of 1000rpm : A 220 V, 1500 rpm, 11.6 A (armature current) separately excited motor is controlled by a single phase, full wave SCR converter. The armature resistance of the motor is 2 ohm. The ac source voltage is 230 V (rms) 60 Hz.
Describe four types of audit opinions green and associates : Is the client’s refusal to procure an audit of Internal Controls over Financial Reporting in violation of Sarbanes-Oxley? Why or why not?
Determine the average current supplied to the cars motor : A 0.954-kg toy car is powered by 2 C cells (3.00V total) connected directly to a small DC motor. The car has an effective energy conversion efficiency of 52.6%, What is the average current supplied to the car\'s motor
Explain what is the equilibrium constant k final : Given the two reactions: PbCl2 Pb2+ + 2Cl-, K1 = 1.80*10^-10, and AgCl Ag+ + Cl-, K2 = 1.19*10^?4, what is the equilibrium constant K final for the following reaction PbCl2 + 2Ag+ 2AgCl + Pb2+
What resistance should be added to the armature current : A dc shunt motor drives a centrifugal pump at a speed of 1000rpm when the terminal voltage and the line currents are 200V and 50A, respectively. The armature and field resistance are 0.1 ohm and 100 ohm respectively.
Your discussion should include the topics you feel : Discuss the previous week’s objectives with your team. Your discussion should include the topics you feel comfortable with, any topics you struggled with, and how the weekly topics relate to application in your field.
Determine the final temp and salinity of the mixture : 1000 kg of seawater at 17.5 C and salinity of 3 percent is mixed with 500 kg of pure water with initial temperature 5 C, Determine the final temp C and salinity % of the mixture?
What impact would a change that shifts an economy production : What impact would a change that shifts an economy's production possibilities curve outward have on the long run aggregate supply curve? How have improvements in computer technology affected production possibilities and the long run aggregate supply c..
Calculate the motor speed if the field is reduced : A 600V, dc shunt motor has an armature and field resistance of 1.5 ohm and 600 ohm, respectively. When the motor runs unloaded, the line current is 3A, and the speed is 1000 rpm.

Reviews

Write a Review

Electrical Engineering Questions & Answers

  What is the correspoding carrier- to - noise ratio

An AM receiver, operating with a sinusoidal modulating signal and 80 percent modulation, has an output signal-to-noise ratio of 30 dB. a) What is the correspoding carrier- to - noise ratio

  Write algorithm to subtract 32 from fahrenheit temperature

Write a main program to call a procedure that converts the Fahrenheit temperature value stored in the location labeled TdegF to its Celsius equivalent. The range of temperatures is 32°F to 212°F. The procedure stores the converted temperature

  Explain problem on complex power

Problem on complex power, An electric load operates at 240 volts. The load absorbs an average power of 8Kw at a lagging power factor of 0.8.

  Does the sum of the resistor voltage drops satisfy kvl

V1(18V) R1(1k) R2 (1.5k) R3 (2k)How does the ratio V2 V1 compare to the raioR2 R1?How does the ratio V3 V1 compare to the raioR3 R1 Add the measured voltage V1 V2 and V3 How does this value compare to the value Vt

  Calculate the open-circuit secondary voltage

A single-phase 50-KVA, 2400/240-volt, 60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm magnetizing reactance referred to the high-voltage side. If rated voltage is applied to the high-voltage winding

  Find amount of work in foot-pounds required to empty trough

A trough is 8 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of y=x^{8} from x=-1 to x=1 . The trough is full of water. Find the amount of work in foot-pounds required to empty

  How much hydrogen would be needed

How much hydrogen would be needed to give the car a range of 300 miles if the source of electricity is an on-board fuel cell with an efficiency that is 50% of the ideal?

  The condition on the sampling period is determined

Finding the periodicity in N of the discrete time signal x(n) = Cos(3pi*Ts.n + pi/4) and then plotting the discrete signal. From this the condition on the sampling period is determined

  What is the minimum sampling frequency for a/d conversion

A video signal contains light variations that change at a frequency as high as 3.5 MHz. What is the minimum sampling frequency for A/D conversion?

  Calculate the normal force n exerted by the side of the slot

The flat circular disk rotates about a vertical axis through O with a slowly increasing angular velocity ?. Prior to rotation, each of the 0.44-kg sliding blocks has the position x = 22 mm with no force in its attached spring.

  What is the rms value of the current through the capacitor

a 10uF capacitor is plugged into a 110v rms 60 hz voltage source with an ammeter in series. what is the rms value of the current through the capacitor?

  Define facilitate storage nd retrieval of persistent objects

How do you create a class in Java to enable its object to be persistent What are Java data streams and how are they used to facilitate storage and retrieval of persistent objects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd