Q48/ A 3-phase, 6-pole, 50 Hz induction motor develops 3.68 KW at 950 r.p.m. if the stator losses are 300 W. find the stator input Ans[4.17kw] Q49/ The power input to a 3-phase induction motor is 40 KW. The stator losses total 1 KW and the mechanical losses are 1.6 Kw. Determine (i) shaft power (ii) rotor Cu loss and (iii) efficiency of the motor with a slip of 3.5%. Ans[800 r.p.m., 0.42/phase]

Q48/ A 3-phase, 6-pole, 50 Hz induction motor develops 3.68 KW at 950 r.p.m. if the stator losses are 300 W. find the stator input Ans[4.17kw] Q49/ The power input to a 3-phase induction motor is 40 KW. The stator losses total 1 KW and the mechanical losses are 1.6 Kw. Determine (i) shaft power (ii) rotor Cu loss and (iii) efficiency of the motor with a slip of 3.5%. Ans[800 r.p.m., 0.42/phase]

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter39: Synchronous Motor Operation

Section: Chapter Questions

Problem 14SQ: Induction motors and welding transformers require magnetizing current, which causes a. lagging power...

See similar textbooks

Related questions

Q: A three phase 6000 V alternator has the following O.C.C. at normal speed: Field current : 14 18 23…

Q: 7. The voltage generated across one inductor of a 3Ø alternator is 6 volts. There are 120 slots and…

A: q=slot per pole per phase=SP×3=1203×10=4 g=slotpole=12010=12 Υ=180°g Υ=18012=15°

Q: In a workshop, there is a three-phase asynchronous motor with a power of 6 HP, an efficiency of 85%,…

A: Given dataOutput power, Efficiency, Initial power factor, Final power factor, To find outWe have to…

Q: What will be the operating power factor of a 3-phase induction motor, whose ratings are 230 V, 50…

A: Given- V=230Vf=50 HzP=120 hppoles=4η=92%il=260 Acore loss=1710 Wstator loss=2830 W…

Q: 4. An induction motor draws 4.5 A at a 0.75 lagging power factor from a 208V, 60 Hz source. a) What…

A: Only one question is to be answered according to bartleby policy.

Q: The winding of a 4-pole alternator having 36 slots and a coil span of 1 to 8 is short-pitched…

A: Dear,as per company guidelines we can answer only one question at a time, kindly post other question…

Q: he terminal voltage of a 150 kW series generator is 600 V at rated load. The armature resistance is…

A: Given Data: Vt = 600 V Pg = 150 kW Ra = 0.06 ohm Rse = 0.04 ohm

Q: induction motor is rated 5 HP, 75% power factor and 220 V. What approximate size of capacitor (VAR)…

A: We need to find out VAR size for increased power factor

Q: A four-pole induction motor drives a load at 2575 rpm. This is to be accomplished by using an…

Q: A generating voltmeter is required to measure voltage between 15kV and 250kV. If the indicating…

A: Given that:Measure voltage between: 15KV to 250 KV Imn=2μA Imax=35μA Speed of…

Q: . What are the various losses in an induction motor? On what factors do they depend

A: The fallowing are the various losses that occur in an induction motor:

Q: he speed of an induction motor fed from a 3-phase and 50 Hz source is 1440 rpm, so which of the…

Q: What are the losses types of 3-phase induction motor?

Q: What is the output speed of AC induction motor in our lab with six poles per phase and its slip is…

A: Given Data: s = 8% P = 6

Q: 8. A 3-phase induction motor is running at 2% slip. If the input to rotor is 1000 W, then mechanical…

A: Given, A 3-phase induction motor has Slip, s=2%=0.02 Input power, Pin=1000 W

Q: If two 3-phase induction machines are mechanically coupled with each other. The two machines are…

A: The induction motors are coupled here mechanically. The speed will same for both machines because of…

Q: The power supplied to a three-phase induction motor is 20kW and the stator losses are 1000W. If the…

Q: 2. A 36, 60 Hz, 6 pole, wye-connected induction motor is rated at 600 hp (1 hp = 746 W) and 800 V.…

Q: 1. The operation of Commutator in DC Motor is O a) to convert dc to ac O b) to convert ac to dc O c)…

Q: The rotor of a 220 -V 60 Hz, 4-pole induction motor has a power input of 80kW is observed that the…

A: In this question, We need to choose the correct options What is rotor copper losses? If air gap…

Q: Q9 / What are the function of brushes , pole and commutator in DC machine

Q: A 3-phase, 12 pole alternator is coupled to an engine running at 500 rpm. The alternator supplies…

Q: the field windings of a series motor has a resistance of 120 ohms at 15° c. after running for 2…

A: Given The temperature coefficient of winding at 00c is 0.004 The Resistance of winding at (T1) 150c…

Q: A 6 pole DC wave wound generator has 28 armature conductors with flux per pole is 23 mWb and the…

A: Given that A poles P = 6 DC wave wound generator Parallel paths A= 2 Conductors z= 28 flux per…

Q: B) 6 - pole alternator running at 1000 r.p.m. supplies an 8 – pole induction motor. What is the…

Q: 5. Analyzing an AC power outlet: a. Identify the common names for measurements 1, 2, 3, and 4 for…

A: The waveform,

Q: A four-pole induction motor drives a load at 2478 rpm. This is to be accomplished by using an…

A: speed of the induction motor Nr = 2478 rpm dc voltage V = 400 V number of poles P= 4 slip =…

Q: The maximum speed of an alternator working at 60 Hz is possible when the number of poles of the…

A: We know that the alternator's maximum speed is synchronous speed.

Q: In a three-phase induction motor the maximum torque occurs at 20% slip and the equivalent resistance…

Q: One phase of a 3-phase alternator consist of 12 coils in series. Each coil has an rms voltage of 10V…

A: It is given that: β=10°m=10Es=10 V

Q: The power supplied to a three-phase induction motor is 50 kW and the stator losses are 2 kW. If the…

Q: A three-phase induction motor operates at a slip of 3% and has a rotor copper loss of 300W. The…

Q: The rotor of a 3-phase, 60 Hz, 4-pole induction motor takes 118 kW at 3 Hz. The motor has stator…

Concept explainers

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.

Question

Q48/ A 3-phase, 6-pole, 50 Hz induction motor develops 3.68 KW at 950 r.p.m. if the stator losses are
300 W. find the stator input
Ans[4.17kw]
Q49/ The power input to a 3-phase induction motor is 40 KW. The stator losses total 1 KW and the
mechanical losses are 1.6 Kw. Determine (i) shaft power (ii) rotor Cu loss and (iii) efficiency of
Ans[800 r.p.m., 0.42/phase]
the motor with a slip of 3.5%.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Step by step

Solved in 5 steps with 5 images

SEE SOLUTION Check out a sample Q&A here

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

If two 3-phase induction machines are mechanically coupled with each other. The two machines are supplied by 50 Hz and 60 Hz, respectively. the speed of the combination of both machines will be:
8. A 3-phase induction motor is running at 2% slip. If the input to rotor is 1000 W, then mechanical power developed by the motor is ............ (i) 20 W (iii) 500 W (ii) 980 W (iv) 200 W
The rotor of a 3-phase, 60 Hz, 4-pole induction motor takes 118 kW at 3Hz. The motor has stator copped loss of 2.95 kW, a mechanical loss of 2kW and a stator core loss of 1.7 kW. Solve for the motor efficiency
What will be the operating power factor of a 3-phase induction motor, whose ratings are 230 V, 50 Hz, 120 hp, and 4-poles? Motor is operating at rated conditions with an efficiency of 92% and draws a line current of 260 A. The core loss and stator copper losses are 1710 W and 2830 W respectively. (a) 0.85 (c) 0.93 (b) 0.90 (d) 0.80
A four-pole induction motor drives a load at 2575 rpm. This is to be accomplished by using an electronic converter to convert a 400-V dc source into a set of three-phase ac voltages. ▾ Part A Find the frequency required for the ac voltages assuming that the slip is 4 percent. The load requires 2 hp. Express your answer to three significant figures and include the appropriate units. f= Submit ▾ Part B Value μÀ Submit I= Value Provide Feedback ^ Request Answer If the dc-to-ac converter has a power efficiency of 85 percent and the motor has a power efficiency of 80 percent, estimate the current taken from the dc source. Express your answer to three significant figures and include the appropriate units. 4 Ò Request Answer Units ? Units ?
V:58)
The power supplied to a three-phase induction motor is 20kW and the stator losses are 1000W. If theslip is 4 %, find the rotor copper loss
A 3 phase AC induction motor is operating at no load. What is the power factor? Group of answer choices A) leading B) lagging C) neither leading nor lagging
3. What are the various losses in an induction motor? On whatfactors do they depend?
Please solve , last time i got wrong answer
Note: Please don't write by handwriting.
The speed of an induction motor fed from a 3-phase and 50 Hz source is 1440 rpm, so which of the following is the number of poles of the motor?a)2b)4C)6d)8f) 12