Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 29, Problem 1RQ
To determine
The way in which the direction of the rotation of the three phase motor can be changed.
Expert Solution & Answer
Explanation of Solution
The direction of the rotation of three phase motor is changed by changing the leads connection. Consider the Figure 29-1 of the text book as it has T leads, when the leads 1 and 3 are interchanged then the motor starts to rotate in the opposite direction.
The change in terminals changes the flow of current and it changes the direction of the rotation of the field thus, it changes the direction of rotation of the motor.
The rotation of the motor is also changed by the help of the reverse starter as shown in Figure 29-2 in the text book.
Thus, the direction of the rotation of the three phase is obtained by the change inn terminals.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Study Area
Document Sharing
User Settings
Access Pearson
mylabmastering.pearson.com
P Pearson MyLab and Mastering
The crash cushion for a highway barrier consists of a
nest of barrels filled with an impact-absorbing material.
The barrier stopping force is measured versus the vehicle
penetration into the barrier. (Figure 1)
Part A
P Course Home
b My Questions | bartleby
Review
Determine the distance a car having a weight of 4000 lb will penetrate the barrier if it is originally traveling at 55 ft/s when it
strikes the first barrel.
Express your answer to three significant figures and include the appropriate units.
Figure
1 of 1
36
μΑ
S =
Value
Units
Submit
Request Answer
Provide Feedback
?
Next >
Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 12 MPa, and the
condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 50 kg/s.
Determine:
(a) the net power developed, in kW.
(b) the rate of heat transfer to the steam passing through the boiler, in kW.
(c) the percent thermal efficiency.
(d) the mass flow rate of condenser cooling water, in kg/s, if the cooling water undergoes a temperature
increase of 18°C with negligible pressure change in passing through the condenser.
4. The figure below shows a bent pipe with the external loading FA
228 lb, and M₁ = M₂ = 1 kip-ft. The force Fernal loading FA = 300 lb, FB:
parallel to the y-axis, and
and yc = 60°.
= 125 lb, Fc
=
acts parallel to the x-z plane, the force FB acts
Cartesian resultan Coordinate direction angles of Fc are ac = 120°, ẞc = 45°,
a. Compute the resultant force vector of the given external loading and express it in
EST
form.
b. Compute the resultant moment vector of the given external loading about the origin, O,
and express it in Cartesian vector form. Use the vector method while computing the
moments of forces.
c. Compute the resultant moment vector of the given external loading about the line OA
and express it in Cartesian vector form.
:00 PM EST
k
ghoufran@buffaternal du
2 ft
M₁
A
40°
FA
M2
C
18 in
1 ft
Fc
25
houfran@bald.edu - Feb 19,
3 ft
FB
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- The differential equation of a cruise control system is provided by the following equation: Find the closed loop transfer function with respect to the reference velocity (vr) . a. Find the poles of the closed loop transfer function for different values of K. How does the poles move as you change K? b. Find the step response for different values of K and plot in MATLAB. What can you observe? c. For the given transfer function, find tp, ts, tr, Mp . Plot the resulting step response. G(s) = 40/(s^2 + 4s + 40)arrow_forwardAuto Controls Perform the partial fraction expansion of the following transfer function and find the impulse response: G(s) = (s/2 + 5/3) / (s^2 + 4s + 6) G(s) =( 6s^2 + 50) / (s+3)(s^2 +4)arrow_forwardStudy Area Document Sharing User Settings mylabmastering.pearson.com Access Pearson P Pearson MyLab and Mastering The 150-lb skater passes point A with a speed of 6 ft/s. (Figure 1) Figure 1 of 1 Part A P Course Home b My Questions | bartleby Determine his speed when he reaches point B. Neglect friction. Express your answer to three significant figures and include the appropriate units. με ? VB = Value Units Submit Request Answer Part B Determine the normal force exerted on him by the track at this point. Express your answer to three significant figures and include the appropriate units. ☐ о Α NB = Value Units Submit Request Answer Provide Feedback ? ■Review Next >arrow_forward
- mylabmastering.pearson.com Access Pearson P Pearson MyLab and Mastering P Course Home b My Questions | bartleby Study Area Document Sharing User Settings The 100-kg crate is subjected to the forces shown. The crate is originally at rest. The coefficient of kinetic friction between the crate and the surface is μk = 0.2. (Figure 1) Part A Determine the distance it slides in order to attain a speed of 8.1 m/s. Express your answer to three significant figures and include the appropriate units. Figure 500 N 1 of 1 Α S = Value Units Submit Request Answer Provide Feedback ? ■Review Next >arrow_forwardThe differential equation of a DC motor can be described by the following equation Find the transfer function between the applied voltage ( Va)and the motor speed (thetadot m). What is the steady state speed of the motor after a voltage (Va = 10V) has been applied. Find the transfer function between the applied voltage (Va) and the shaft angle (thetadot m) .arrow_forwardStudy Area Document Sharing User Settings Access Pearson mylabmastering.pearson.com P Pearson MyLab and Mastering The crash cushion for a highway barrier consists of a nest of barrels filled with an impact-absorbing material. The barrier stopping force is measured versus the vehicle penetration into the barrier. (Figure 1) Part A P Course Home b My Questions | bartleby Review Determine the distance a car having a weight of 4000 lb will penetrate the barrier if it is originally traveling at 55 ft/s when it strikes the first barrel. Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 36 μΑ S = Value Units Submit Request Answer Provide Feedback ? Next >arrow_forward
- Study Area Document Sharing User Settings mylabmastering.pearson.com Access Pearson P Pearson MyLab and Mastering Part A P Course Home b My Questions | bartleby ■Review The sports car has a mass of 2.5 Mg and accelerates at 6 m/s², starting from rest. (Figure 1) If the drag resistance on the car due to the wind is FD = (10v) N, where v is the velocity in m/s, determine the power supplied to the engine when t = 5 s. The engine has a running efficiency of € = 0.66. Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 о Α ? P = Value Units Submit Request Answer Return to Assignment Provide Feedbackarrow_forwardAccess Pearson Study Area mylabmastering.pearson.com P Pearson MyLab and Mastering Document Sharing User Settings The car in (Figure 1) having a mass of 2 Mg is originally traveling at 2 m/s. Assume 0 = 22°. Figure 1 of 1 Part A P Course Home b My Questions | bartleby ■Review Determine the distance it must be towed by a force F = 4 kN in order to attain a speed of 6 m/s. Neglect friction and the mass of the wheels. Express your answer to three significant figures and include the appropriate units. Α ? S = Value Units Submit Request Answer Provide Feedback Next >arrow_forwardDerive the Laplace transform of the following functions. Use the definition of Laplace transform. f(t)=sin4t and f(t)=cos2t Auto Controlsarrow_forward
- Study Area Document Sharing User Settings Access Pearson P Pearson MyLab and Mastering Marbles having a mass of 5 g fall from rest at A through the glass tube and accumulate in the can at C. (Figure 1) Figure Aarrow_forwardVC Vc B S TDC -BDC S TQ Tp = Pg A (asne) [1+ % CUSA] At what position (in degrees after top dead center) would you want the peak pressure of combustion to occur to create the maximum torque on the crankshaft? For a 100mm piston digimeter acting on a connecting. rod with a length of 80mm use the equation above to calculate the torque (NIM) on the crankshaft at this crank position for an engine that develops a peak pressure of 135 bararrow_forwardAccess Pearson P Pearson MyLab and Mastering Study Area Document Sharing User Settings The man having a weight of 180 lb is able to run up a 18-ft-high flight of stairs shiwn in (Figure 1) in 4 s. Figure 1 of 1 R mylabmastering.pearson.com Part A P Course Home b My Questions | bartleby Determine the power generated. Express your answer in horsepower to three significant figures. ΜΕ ΑΣΦ. Η vec P = Submit Request Answer Part B ? hp How long would a 100-W light bulb have to burn to expend the same amount of energy? Express your answer to three significant figures and include the appropriate units. HÅ ? t = Value Units Submit Request Answer Provide Feedback Review Next >arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Understanding Motor ControlsMechanical EngineeringISBN:9781337798686Author:Stephen L. HermanPublisher:Delmar Cengage Learning
Electrical Transformers and Rotating MachinesMechanical EngineeringISBN:9781305494817Author:Stephen L. HermanPublisher:Cengage Learning
Understanding Motor Controls
Mechanical Engineering
ISBN:9781337798686
Author:Stephen L. Herman
Publisher:Delmar Cengage Learning
Electrical Transformers and Rotating Machines
Mechanical Engineering
ISBN:9781305494817
Author:Stephen L. Herman
Publisher:Cengage Learning