Homework Answers
Add Answer to:
نقطتان (2) Calculate the current needed to run an electrical motor rotating at 1816 rpm and...
b that will render the system uncoupled. 2) For a rotary direct current electric motor that...
b that will render the system uncoupled. 2) For a rotary direct current electric motor that having the following torque speed curve. Answer following questions: Torque (NoM) a) What is the value of the no-load speed? b) Given the slope of the curve is - 2 x 10-5, what is value of the stall torque? c) Given the motor constant K = 0.1 N.m/A, and the armature voltage V2 = 48 V, calculate the armature resistance Ra. d) Calculate the...
Calculate the rpm needed for a motor with 280 ft-lbs of torque to drive a permanently...
Calculate the rpm needed for a motor with 280 ft-lbs of torque to drive a permanently installed horizontal 42"-belt that is one mile long. The production rate of the system should be 500 tph when the belt moves 308 fpm. The speed reduction mechanism used is a v-belt with sheaves, and the material density is 150 lbs/ft?
Show all working 1. A 4 pole, 220 V, 10 H.P, d.c. shunt motor is rotating...
Show all working 1. A 4 pole, 220 V, 10 H.P, d.c. shunt motor is rotating at a speed of 320 rpm. Then the developed useful torque is 2. A 4 pole, lap wound d.c. motor drawing an armature current of 20 A has 360 conductors. If the flux per pole is 0.015 Wb then the gross torque developed by the armature of motor is 3. A 220 V, d.c. motor draws an armature current of 20 A. Its armature...
need the answer for the question no. 1 ENGR 113 Homework DC Motor Objectives Plot the...
need the answer for the question no. 1
ENGR 113 Homework DC Motor Objectives Plot the Torque-Speed curve for a given DC motor given the stall torque and no load speed values Calculate the rotational power for a DC motor given the stall torque and no load speed values Plot the rotational power on a Torque-Speed curve to see the relationship between torque, speed, and power Calculate the maximum efficiency of a DC motor. Calculate the operating point for a...
A single-phase electrical motor draws a current of 20 A from 240, 60 Hz line. A...
A single-phase electrical motor draws a current of 20 A from 240, 60 Hz line. A Fluke wattmeter is connected into line gives an active power (P) reading of 3,792 W. with line, neutral, appropriate fuse, switch, and motor itself. (DO NOT forget chassis ground of the motor for the safety of people working in/around the motor). Show a simple wiring diagram (a) Calculate the power factor (cost) of the motor and reactive power () it absorbs. (b) If we...
how do we calculate ii and iii) - induction motor (25 marks) QUESTION 3 A three-phase,...
how do we calculate ii and iii) - induction motor
(25 marks) QUESTION 3 A three-phase, 400 V, 50 Hz, 4-pole, 1370 rpm, star connected, squirrei-cage induction motor has the following parameters: R, 20, R2- 3 Q, X1-X2- 3.5 and Xm=40 .Motor is controlled by a voltage source inverter at constant V/f ratio. By using IEEE equivalent circuit; Calculate the starting torque and starting current at 10 Hz To- If the torque-speed to be a straight line calculate the slip...
A three phase induction motor draws a starting current which is five times the full load...
A three phase induction motor draws a starting current which is five times the full load current with direct on line starting, while developing twice the full load torque. Q2.1. Based on the two facts that starting current is proportional to the applied voltage and that the starting torque is proportional to the square of the applied voltage, determine voltage (as a per cent of rated voltage) required to obtain a starting torque equalling the full load torque. (10 marks)...
(b) (i) Explain briefly why an induction motor can never run at synchronous speed? (2 Marks)...
(b) (i) Explain briefly why an induction motor can never run at synchronous speed? (2 Marks) (ii) If a six-pole induction motor supplied by a three-phase 50 Hz supply has a rotor frequency of 2.3 Hz, Calculate: (a)The percentage slip (b)The speed of the rotor in rpm (4 Marks) (iii)Draw a typical torque versus slip characteristic curve of an induction motor. If rotor resistance is increased show how the new torque versus slip curve deviates from the original one. (4...
43 Questions 1. Using Figure 4-2, determine the electrical relationship characterizing a standard DC motor. Express...
43 Questions 1. Using Figure 4-2, determine the electrical relationship characterizing a standard DC motor. Express the relationship in the Laplace domain. L. i,o, M ry Figure 4-2 DC Motor Electric Circuit 2. Determine and evaluate the motor electrical time constant, τ.. This is done by assuming that the shaft is stationary. You can find the parameters of the motor in Table B-1. 3. Assume τ. is negligible and simplify the motor electrical relationship determined in question 1. What is...
1. A 4 pole, 220 V, 10 H.P, d.c. shunt motor is rotating at a speed...
1. A 4 pole, 220 V, 10 H.P, d.c. shunt motor is rotating at a speed of 320 rpm. Then the developed useful torque is a.210.647 N-m b.215.547 N-m c.219.484 N-m d.None of these 2. A 4 pole, lap wound d.c. motor drawing an armature current of 20 A has 360 conductors. If the flux per pole is 0.015 Wb then the gross torque developed by the armature of motor is a.10.23 N-m b.15.56 N-m c.17.17 N-m d.19.08 N-m 3....
b that will render the system uncoupled. 2) For a rotary direct current electric motor that having the following torque speed curve. Answer following questions: Torque (NoM) a) What is the value of the no-load speed? b) Given the slope of the curve is - 2 x 10-5, what is value of the stall torque? c) Given the motor constant K = 0.1 N.m/A, and the armature voltage V2 = 48 V, calculate the armature resistance Ra. d) Calculate the...
Calculate the rpm needed for a motor with 280 ft-lbs of torque to drive a permanently installed horizontal 42"-belt that is one mile long. The production rate of the system should be 500 tph when the belt moves 308 fpm. The speed reduction mechanism used is a v-belt with sheaves, and the material density is 150 lbs/ft?
need the answer for the question no. 1
ENGR 113 Homework DC Motor Objectives Plot the Torque-Speed curve for a given DC motor given the stall torque and no load speed values Calculate the rotational power for a DC motor given the stall torque and no load speed values Plot the rotational power on a Torque-Speed curve to see the relationship between torque, speed, and power Calculate the maximum efficiency of a DC motor. Calculate the operating point for a...
A single-phase electrical motor draws a current of 20 A from 240, 60 Hz line. A Fluke wattmeter is connected into line gives an active power (P) reading of 3,792 W. with line, neutral, appropriate fuse, switch, and motor itself. (DO NOT forget chassis ground of the motor for the safety of people working in/around the motor). Show a simple wiring diagram (a) Calculate the power factor (cost) of the motor and reactive power () it absorbs. (b) If we...
how do we calculate ii and iii) - induction motor
(25 marks) QUESTION 3 A three-phase, 400 V, 50 Hz, 4-pole, 1370 rpm, star connected, squirrei-cage induction motor has the following parameters: R, 20, R2- 3 Q, X1-X2- 3.5 and Xm=40 .Motor is controlled by a voltage source inverter at constant V/f ratio. By using IEEE equivalent circuit; Calculate the starting torque and starting current at 10 Hz To- If the torque-speed to be a straight line calculate the slip...
(b) (i) Explain briefly why an induction motor can never run at synchronous speed? (2 Marks) (ii) If a six-pole induction motor supplied by a three-phase 50 Hz supply has a rotor frequency of 2.3 Hz, Calculate: (a)The percentage slip (b)The speed of the rotor in rpm (4 Marks) (iii)Draw a typical torque versus slip characteristic curve of an induction motor. If rotor resistance is increased show how the new torque versus slip curve deviates from the original one. (4...
43 Questions 1. Using Figure 4-2, determine the electrical relationship characterizing a standard DC motor. Express the relationship in the Laplace domain. L. i,o, M ry Figure 4-2 DC Motor Electric Circuit 2. Determine and evaluate the motor electrical time constant, τ.. This is done by assuming that the shaft is stationary. You can find the parameters of the motor in Table B-1. 3. Assume τ. is negligible and simplify the motor electrical relationship determined in question 1. What is...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago