Operating under rated load and the field flux

Assignment Help Mechanical Engineering
Reference no: EM13949126

A 10-hp, 230-V shunt-wound motor has a rated speed of 1,000 r/min and full-load efficiency of 86 percent. Armature-circuit resistance is 0.26 Q; field-circuit resistance is 225 Q. If this motor is operating under rated load and the field flux is very quickly reduced to 50 percent of its normal value, what will be the effect upon counter emf, armature current, and torque? What effect will this change have upon the operation of the motor, and what will be its speed when stable operating conditions have been regained?

Reference no: EM13949126

Questions Cloud

Sketch the motor-pump circuit : Sketch the motor-pump circuit. Derive the dynamic equations for the system, and determine the transfer function between motor voltage and the pressure across the load.
In a regression analysis involving : y = 16.3 + 2.3x1 + 12.1x2 - 5.8x3For this estimated regression equation SST = 1550 and SSE = 100. b. Use an F test and a .05 level of significance to determine whether x2 and x3 contribute significantly to the model.
This week readings and videos make a strong case : Write a description of two or three forces of resistance that exist in your environment/practice. Suggest ways in which the new balance of teaching and learning practices can help to create an educational community less resistant to change.
What are these different types of classifications : Why is it important to classify each of these types in an ERD (entity relationship diagram) model?
Operating under rated load and the field flux : A 10-hp, 230-V shunt-wound motor has a rated speed of 1,000 r/min and full-load efficiency of 86 percent. Armature-circuit resistance is 0.26 Q; field-circuit resistance is 225 Q. If this motor is operating under rated load and the field flux is v..
Compare/contrast the marriages of othello & desdemona : Choose one of the following question options and answer it in a 3-5 paragraph essay. You don't need a long conclusion or introduction, but do make sure you have a clearly stated thesis statement! Use quotes from each text to support your argument.
Discuss the importance ehr conceptual framework : As the manager of the CTU Health Care information systems department, you realize the need for seamless integration among all operating systems of the departments within the health care organization (HCO). Discuss the importance electronic health ..
Journalize the entries to record these transactions : Journalize the entries to record these transactions. For a compound transaction, if an amount box does not require an entry, leave it blank. In your computations, round per share amounts to two decimal places. When required, round final answers to th..
Power loss in the field and its percentage of total power : A 50-hp, 230-V shunt motor has a field resistance of 17.7 Q and operates at full load when the line current is 181 A at 1,350 r/min. To increase the speed of the motor to 1,600 r/min, a resistance of 5.3 Q is "cut in" via the field rheostat; the l..

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  A room in the lower level of a cruise ship has a 30cm

a room in the lower level of a cruise ship has a 30cm diameter circular window.if the midpoint of the window is 4m

  Using the components system shown provide an expression for

an airplane a takes off as shown with a constant speed equal to v110kmh. the path of the airplane is described in the

  Determine a the distance traveled by the tractor-trailer

a tractor-trailer is traveling at 60 mih when the driver applies his brakes. knowing that the braking forces of the

  If the total solidification time of the casting itself is

a riser in the shape of a sphere is to be designed for a sand casting mold. the casting is a rectanglar plate with

  Have your team develop a carrying mechanism for rollerblades

Put together a team of five students from your class. Using the 10-stage design process, have your team develop a carrying mechanism for Rollerblades and/or your shoes when one is not in use.

  Review on fabrication and construction of a modified Co2

The literature review on fabrication and construction of a modified Co 2 single stroke positive displacement pump driven with electric motor

  Determine the inner diameter of the bones cross section at

a stress gauge located at c on the surface of the bone ab indicates that the average normal stress in the bone is 3.80

  Axes of symmetry or asymmetry in model

With justifications for your choice, identify any axes of symmetry or asymmetry in the model and describe in words the conditions you would apply at these boundaries to produce a reduced symmetry model with smaller geometry.

  Consider a carnot refrigeration cycle with a working fluid

consider a carnot refrigeration cycle with a working fluid of r-134a operating between temperatures of -10oc and 20oc.

  What is the angular velocity wcd

What is the angular velocity Wcd (t)?

  Find the tension in ropes a and b

a 100 pound ball is suspended from a wall by a rope that is pulled asided by a horizontal rope B and held so that rope A makes a angle of 30 degrees with the vertical wall. Find the tension in ropes A and B?

  What is the mass flow rate in kgs through the turbine the

a water reservoir 500 m by 500 m by 2 m deep located on a hill supplies water to a town at a gauge pressure of 500 kpa.

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