Question

Please show all steps with clear hand-writing. Final answers are provided in the bottom and must match with your answers.Consider a 7.5 kW, 2910 rpm three-phase 50Hz induction machine operating at rated voltage. (a) Calculate its synchronous spee

0 0
Add a comment Improve this question Transcribed image text
Answer #1

300 o 4 coeho ated speed amd iM smcu i always . tale at . N.< s Slap speed =. SNS Cb) At nooad conditcen, the macline- 30DD CーX100 3DD D ovey load

Add a comment
Know the answer?
Add Answer to:
Please show all steps with clear hand-writing. Final answers are provided in the bottom and must match with your answers...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955...

    A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955 rpm and rated torque of 35 Nm. This motor drives a load with a torque characteristic that increases linearly with speed such that it equals the load torque at the rated speed. It draws a current of 2.1 A(rms) per phase at the rated voltage at a power factor of 0.81 (lagging). The stator resistance Rs = 2.0 ohms. At the rated operating speed,...

  • Q5.8:The specifications of machine 5.8. For the machine in the previous question, calculate (a) its no-load speed (b)its rated efficiency-olcoxL-n/nN (c) the following when the speed is ze...

    Q5.8:The specifications of machine 5.8. For the machine in the previous question, calculate (a) its no-load speed (b)its rated efficiency-olcoxL-n/nN (c) the following when the speed is zero (stall condition) (i)induced voltage (ii) nput current (ii) output torque (iv) ut power (v)output power (vi) efficiency (d) he speed (in rpm) when the torque is 0.2 Nm 5 A DC machine has a no-load speed of 10,000 rpm and a rated speed of 8,000 rpm when operating with its rated supply...

  • Please show the whole details in a clear way . For the following two machines P...

    Please show the whole details in a clear way . For the following two machines P 2 MW, Vine 3300V Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable,x,-. 4.57 Ω at ae-: 2π50 rad /s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable, Xd-1.3 ถ. Xq-4.57 Ω at ae 2n50 rad /s Find a) Find the back-EMF voltage E,...

  • Please use exact methods and not approximations! 7.15. A three-phase, 460 V, 60 Hz, 1760 rpm, wound-rotor induction mot...

    Please use exact methods and not approximations! 7.15. A three-phase, 460 V, 60 Hz, 1760 rpm, wound-rotor induction motor has the following equivalent circuit parameters Ri=0.25 ohm : R'= 0.2 ohm : Xi = 1.2 ohm : X2,= 1.1 ohm : 'Ku = 35 ohm The motor is connected to a 3ph, 460V, 60Hz supply and is star-connected. Use the simplified equivalent circuit. Initially the external rotor resistance is set to zero. (a) Calculate the speed (in rpm) at which...

  • Q1b) DC Machines [ 6 marks ] You are given a 24 V DC motor. When...

    Q1b) DC Machines [ 6 marks ] You are given a 24 V DC motor. When you connect it to a 24 V supply, under no-load conditions it spins at 2,000 rpm. With the same 24 V supply, when the motor is stalled, the input current is 50 A. i) Calculate the back-emf constant and hence the stall torque of the motor. Find also the armature resistance. [3 marks ] ii) The DC motor has a rated input current of...

  • 5.7. A DC machine has a back-emf constant of 0.24 V/(rad/s) and a resistance of 0.5...

    5.7. A DC machine has a back-emf constant of 0.24 V/(rad/s) and a resistance of 0.5 ohms. It is operating from a 12V DC power supply. At its rated speed of 400 rpm, calculate its (a) rated back-emf voltage (that is, the back-emf at rated speed) (b)rated current (that is, the current at rated speed) (c) rated torque (d) rated output power POUT= To (e) rated output power POUT = EI (f) rated input power (g) rated efficiency-PouTlPi (h) rated...

  • 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...

  • #3 please and 4 if your feeling kind. thumbs up that is all the info I...

    #3 please and 4 if your feeling kind. thumbs up that is all the info I have for that problem 3 A four-pole, 60 Hz, 460 V, 5 HP induction motor has the following equivalent circuit parameters: Rs = 1.21 , Rr = 0.742, Xs = 3.102, Xr =2.41 , 100 RPM. Find the starting and no-load current for this machine. 4 A motor is rated 50 HP, 60 Hz, 460 V, four poles. When operating at rated conditions, efficiency...

  • Please answer all parts of the questions showing all steps with clear hand-writing. Final answers are provided in the bo...

    Please answer all parts of the questions showing all steps with clear hand-writing. Final answers are provided in the bottom (your answers must match them). (a) 2.059 pu( b)60.9º (c) 1.143 pu A round-rotor synchronous generator has a synchronous reactance of 1.8 per unit. Its excitation system is controlled so that its terminal voltage is always 1 per unit. Resistance and saturation may be neglected. (a)What excitation (in per unit) is required to produce the generator's rated volt-amp output at...

  • 3ELEC 3600. Problem H8 3-phase Wound Rotor Induction Motor This sheet is page 1. Number all...

    3ELEC 3600. Problem H8 3-phase Wound Rotor Induction Motor This sheet is page 1. Number all pages. Consider the following induction machine THREE-PHASE INDUCTION MOTOR DATA* Ratings Line Voltage 2400 V; 72.17 A; Horsepower-300 hp stator frequency60 Hz Design W Poles -4; **Equivalent Circuit Values (in stator ohms Rated Freq)** R1 0.30000 R2'- 0.47159 X2'-1.73000; Jm2.5000 kg-m sq Thevenin Equivalent Circuit Values: RT-0.28524; slip, speed for max Torque0.1375; Rotational Loss Torque-TRL 0.18689 x (speed in rad/s) Nm X1 -1.73000 Xm67.740...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
Active Questions
ADVERTISEMENT