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Moving to the next question prevents changes to this answer estion 1 A 2000 kW, 500...
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...
QUESTION 1 A) (10 marks) A 10 kW, 250 V DC self-excited shunt generator, with an...
QUESTION 1 A) (10 marks) A 10 kW, 250 V DC self-excited shunt generator, with an armature resistance of 0.1 ohm, is delivering 80 % of rated power to the mains at rated voltage when being run at 1000 r.p.m. (revolutions per minute). The field circuit resistance is 220 ohms. The brush contact drop is 0.5 V and rotational (mechanical) losses are 750 W Calculate The induced voltage The electromagnetic torque developed The shaft torque The overall efficiency B) (15...
electrical machines and power course. please answer the question including all parts (1), (2), (3) An...
electrical machines and power course. please answer
the question including all parts (1), (2), (3)
An eight-pole, 25-kW, 120-V dc generator has a duplex lap-wound armature which has 64 coils with 10 turns per coil. Its rated speed is 3600 rpm. 1. How much flux per pole is required to produce the rated voltage in this generator at no-load conditions? 2. What is the current per path in the armature of this generator at the rated load? 3. What is...
A water tower is fed from an underground water source (Figure 2). The difference in level is 67 m. The flow of water must be at least 55 m'/h. To provide this flow (55m/h), a pump must be driven...
A water tower is fed from an underground water source (Figure 2). The difference in level is 67 m. The flow of water must be at least 55 m'/h. To provide this flow (55m/h), a pump must be driven at a speed of 690 RPM. It can turn faster, but without exceeding 900 RPM. Its efficiency is 81%. The pump is driven directly, therefore without gearbox, by an asynchronous motor, which itselif is supplied directly by the 400V/50 Hz three-phase...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Re...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Resistor Ra Ia Figure 5: Simplified model of DC Motor (a) Write the three characteristic equations that determine the behavior of the DC motor. Denote torque constant and speed constant as Ka, K, respectively. (b) Motor parameters are the quantities that define the behavior of the motor. List the motor parameters from the described model. What are their units? (c) For given...
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...
Computer Control System can anyone solve any of thei questions ? 1 - 10 1. The...
Computer Control System
can anyone solve any of thei questions ?
1 - 10
1. The graph below shows the response of a tachometer. What is the Tach Constant (Kt) of this device in mV/rad per sec? 1000 0 50 100 150 200 250 300 350 400 450 500 Speed Rad/Sec 2. What three parameters of a DC motor must be measured in order to develop the torque-speed curve and the rise time curve for the unloaded motor? 3. What...
14. The following details are known about a 200 hp, 500 V, 435 rpm de shunt motor: full-load current is 330 A, insulation class is H, weight is 3400 kg, external diameter of the frame is 915 mm a...
14. The following details are known about a 200 hp, 500 V, 435 rpm de shunt motor: full-load current is 330 A, insulation class is H, weight is 3400 kg, external diameter of the frame is 915 mm and length of the frame is 1260 mm. If the motor is running at full-load, calculate: a. the total losses and efficiency. b, the approximate shunt field exciting current if the shunt field causes 15% of the total losses. the value of...
Due February 23 (Fri), 9:15 AM Chapter 21-4 Farady's Law of Induction 1. (10 points) A...
Due February 23 (Fri), 9:15 AM Chapter 21-4 Farady's Law of Induction 1. (10 points) A fixed 12-crn-diameter wire coil is perpendicular to a magnetic field 0.48 T pointing up. In 0.1 the field is changed to 0.20 T pointing down. What is the average induced emf in the coll? 2. (10 points) What is the direction of the induced current in the circular loop due to the current shown in each part of Fig. 1? Explain why 001- I...
Question 1 Question 2: Question 3: Question 4: Question 5: Question 6: Question 7: Question 8:...
Question 1
Question 2:
Question 3:
Question 4:
Question 5:
Question 6:
Question 7:
Question 8:
Please number each question. Thank you
Question 1 Not yet answered Marked out of 4.00 Flag question If the number density of electrons in a wire is n 1.00 x 1028 m-3, at what drift velocity must they travel through a wire of diameter d 0.560 mm to deliver a current of 7.20 A? Give your answer in mm s1 to 3 significant figures...
QUESTION 1 A) (10 marks) A 10 kW, 250 V DC self-excited shunt generator, with an armature resistance of 0.1 ohm, is delivering 80 % of rated power to the mains at rated voltage when being run at 1000 r.p.m. (revolutions per minute). The field circuit resistance is 220 ohms. The brush contact drop is 0.5 V and rotational (mechanical) losses are 750 W Calculate The induced voltage The electromagnetic torque developed The shaft torque The overall efficiency B) (15...
electrical machines and power course. please answer
the question including all parts (1), (2), (3)
An eight-pole, 25-kW, 120-V dc generator has a duplex lap-wound armature which has 64 coils with 10 turns per coil. Its rated speed is 3600 rpm. 1. How much flux per pole is required to produce the rated voltage in this generator at no-load conditions? 2. What is the current per path in the armature of this generator at the rated load? 3. What is...
A water tower is fed from an underground water source (Figure 2). The difference in level is 67 m. The flow of water must be at least 55 m'/h. To provide this flow (55m/h), a pump must be driven at a speed of 690 RPM. It can turn faster, but without exceeding 900 RPM. Its efficiency is 81%. The pump is driven directly, therefore without gearbox, by an asynchronous motor, which itselif is supplied directly by the 400V/50 Hz three-phase...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Resistor Ra Ia Figure 5: Simplified model of DC Motor (a) Write the three characteristic equations that determine the behavior of the DC motor. Denote torque constant and speed constant as Ka, K, respectively. (b) Motor parameters are the quantities that define the behavior of the motor. List the motor parameters from the described model. What are their units? (c) For given...
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...
Computer Control System
can anyone solve any of thei questions ?
1 - 10
1. The graph below shows the response of a tachometer. What is the Tach Constant (Kt) of this device in mV/rad per sec? 1000 0 50 100 150 200 250 300 350 400 450 500 Speed Rad/Sec 2. What three parameters of a DC motor must be measured in order to develop the torque-speed curve and the rise time curve for the unloaded motor? 3. What...
14. The following details are known about a 200 hp, 500 V, 435 rpm de shunt motor: full-load current is 330 A, insulation class is H, weight is 3400 kg, external diameter of the frame is 915 mm and length of the frame is 1260 mm. If the motor is running at full-load, calculate: a. the total losses and efficiency. b, the approximate shunt field exciting current if the shunt field causes 15% of the total losses. the value of...
Due February 23 (Fri), 9:15 AM Chapter 21-4 Farady's Law of Induction 1. (10 points) A fixed 12-crn-diameter wire coil is perpendicular to a magnetic field 0.48 T pointing up. In 0.1 the field is changed to 0.20 T pointing down. What is the average induced emf in the coll? 2. (10 points) What is the direction of the induced current in the circular loop due to the current shown in each part of Fig. 1? Explain why 001- I...
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Please number each question. Thank you
Question 1 Not yet answered Marked out of 4.00 Flag question If the number density of electrons in a wire is n 1.00 x 1028 m-3, at what drift velocity must they travel through a wire of diameter d 0.560 mm to deliver a current of 7.20 A? Give your answer in mm s1 to 3 significant figures...
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