Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 50, Problem 11SQ
To determine
Design a shunt field circuit with an automatic rheostat control.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
what article of NEC states ungrounded conductor of the motor starter is it necessary to open both the ungrounded conductor and the neutral in a single phase motor
A generating station is to supply four regions of load [15MW,10 MW,20MW,3MW].
The diversity factor at the station is 1-6. Calculate:
(i) The maximum demand on the station.
(ii) Suggest the installed capacity and the number of units.
NOT: Taking installed capacity to be 20% more than the maximum demand.
Pick up the correct answer
1. Most of the high-voltage transmission lines are
A. Underground.
B. Overhead
2. High-voltage transmission lines use
A. Suspension insulators
C. Wireless D. None of them.
B. Pin insulators
C. Both A and B
D. None of them.
C. Either of the above
D. None of the above
3. The load on distributors systems are generally
A. Balanced
B. Unbalanced
4. A feeder in a transmission system feeds power to
A. Distributors B. Generating stations C. Service mains D. All of the above
5. Corona loss increases with
A. Decrease in conductor size & increase in supply frequency.
B. increase in both conductor size and supply frequency.
C. Decrease in both conductor size and supply frequency.
D. Increase in conductor size and decrease in supply frequency.
6. If the length of a cable is doubled. Its capacitance is
C. Quadrupled D. None of the above
7. The distributors for residential areas are
B. 3-D three wire
B. 20V
C. 3-0 four wire D. None of the above
8. Five photocells are…
Chapter 50 Solutions
Electric Motor Control
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
- Pick up the correct answer 1. The area under the daily load curve gives A. average load in kw Ⓑ units generated in kwh 2. the minimum phase-neutral voltage at which corona A. Visual critical voltage C. plant capacity in kw D. Maximum demand in kw occurs is B. Receiving voltage C. String voltage D. Critical disruptive voltage. 3. If the length of a transmission line increases, its inductance is B. Decreases C. Constant A. Increases 4. Photo cells are connected in parallel in order to D. None of them ⒶH Increase voltage rating B. Increase current rating C. Increase life cells. D. All of the them 5. Which of the following is a high head turbine? A Pelton turbine B. Francis turbine 6. Best diversity factor will be at: C. Kaplan turbine D. Propeller turbine A. diversity factor) 7. When the voltage regulation is positive, then receiving voltage is than sending voltage B. More C. Equal D. None of the them Ⓐ. Less 8. Fill factor of solar cell using the data: Pmax 10 w, Voc= 5 V, Isc= 1 A A.5…arrow_forwardHomework: ANOVA Table for followed design Dr B AB -1 -1 1 (15.18,12) 1 -1 -1 (45.48.51) -1 1 -1 (25,28,19) 1 1 (75,75,81)arrow_forward"I need the solution along with proof of the correct choice by the expert." choose the correct answer 1. The maximum break down strength of air at 76 cm mercury pressure and temperature of 25 °C is...... a. 30 V/cm b. 30 kV/cm c. 300 kV/cm d. Non of them 2. The installed capacity of a power station must be not ....... than the maximum demand. b. equal c. more a. Less 3. Area under the daily load curve divided by 24 hour gives daily d. Non of them a. average load in kW. b. maximum demand in kW. c. units generated in kwh. d. Non of them 4. In thermal power station, 5 kwh need to burn fuel has a. 860 k.calorific. b. 1500 k.calorific c. 4300 k.calorific d. Non of them. 5. Francis and Kaplan turbines are used for... heads. a. medium and high b. medium and low c. medium only. d. High only 6. For photo voltage cell, Fill factor is a. Umpimp Uscise b. Vscisc Vmpimp c. Vmpimp d. Vscisc 7. Power available from wind mill is a. PA V² b. -AV² c. PA V³ d. pA V³ 2parrow_forward
- "I need the solution along with proof of the correct choice by the expert." b. Less than 33Kv c. Greater than 33Kv stored as Pick up the correct option for five only (with the solution if required). 1. Suspension insulator used for transmission and distribution of electric power at a. Up to 33Kv 2. The excess energy from wind power turbine can be chemical energy b. mechanical energy 3. Reaction turbines are used for a. High heads a. b. medium heads 4. More efficient plants are used as d. Not of all c. compressed air d. All of them c. low heads d. low and medium heads. a. base load stations b. peak load stations c. Average load d. All of them 5. Alignment of the blade angle with respect to the wind direction to get maximum wind energy can be achieved with the help of a. Fixed gears b. Yaw motor gear 6. For photo voltage cell, Fill factor using the data: b. 0.59 c. 0.20 c. Control systems d. Blades P-15 W, V-18 V, I-4 A. is d. 0.98 a. 0.65 7. A commercial load is connected to the grid…arrow_forwardNeed a aolarrow_forwardNeed correct and step by step handwritten solution. DO NOT USE CHATGPT or other AI tool otherwise downvote and reportarrow_forward
- Q1: If the input x[n] = [001111] is applied to a discrete-time LTI system of impulse response h[n] = [321]. Using z-transform, find the output y[n] of the system.arrow_forwardQ1: If the input x[n] = [001111] is applied to a discrete-time LTI system of impulse response h[n]= = [321]. Find the output y[n] of the system. a. Using analytical technique. b. Using linear convolution technique.arrow_forwardDon't use ai to answer I will report you answerarrow_forward
- An antenna circuit is connected to a 4/4 transmission line with a characteristic impedance 5052. The transmission line is terminated with an antenna having a load impedance Z=60+ j4012. The input voltage at the source is V, 100 V RMS Vy 1. Calculate the input impedance seen by the source at the antenna connection point. 2. Determine the current flowing into the antenna. 3. Verify the supplied power from the source. 4. Calculate the radiated power P 5. Find the power lost in the systemarrow_forwardA resonant half wavelength dipole is made of copper (G= 5.7 ×10 S/m) wire. Determine the conduction-dielectric (radiation) efficiency e of the dipole antenna, if the operating frequency is = 100 MHz, the radi of the wire b is 3x102arrow_forward"Detail the solution to the question with an explanation of the integration." A diploe with a total loss resistance of 122, is connected to generator whose internal impedance is 50+j25, the peak voltage of generator is 2 V and the impedance of the dipole excluding the loss resistance is 73+j42.5. All antenna and generator are connected via 50-92 2/4 long lossless transmission line. (a) Draw the equivalent circuit (b) Determine the power supplied by the generator (c) Determine the power radiated by the antennaarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Electricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning
Electricity for Refrigeration, Heating, and Air C...
Mechanical Engineering
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Cengage Learning