Question 5 A three-phase, 60-Hz, four-pole induction motor runs at a no-load speed of 1790 rpm and a full-load speed of 1720 rpm. a) Calculate the slip and the electrical frequency of the rotor at no-load and full-load I conditions. b) What is the speed regulation of this motor?

Question 5 A three-phase, 60-Hz, four-pole induction motor runs at a no-load speed of 1790 rpm and a full-load speed of 1720 rpm. a) Calculate the slip and the electrical frequency of the rotor at no-load and full-load I conditions. b) What is the speed regulation of this motor?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

See similar textbooks

Related questions

Q: The 3-phase wound-rotor induction motor has .... . a) high starting torque b) low starting current…

A: In this question , we will write induction motor starting related questions..

Q: 4. Discuss the following (rated torque, starting torque, break down torque).

A: There are three type of torques in the motor: 1. Rated torque 2. Starting torque 3. Breakdown torque

Q: A three-phase, 440V, 50 Hz, 6 - pole induction motor running at 950 rpm takes 50 kW at certain load.…

Q: A three-phase induction motor used for a commercial application in Oman runs at 586 rpm at no load…

Q: P3. A 4 pole, 50 Hz three-phase induction motor has a slip of 1% at no load. When operated at…

Q: A wound rotor, induction motor has a rotor resistance of 0.6 ohms per phase and a rotor leakage…

Q: A 3 phase, 400-V, 50 Hz 4 pole induction motor is fed from a 3-phase supply and runs of 1425 rpm.…

A: Given; 3 Phase, 400 V Induction motor f=50 HzP=4Nr=1425 rpm

Q: 7- A 6-pole, 50-Hz, 3-0 induction motor is running at 950 rpm and has rotor Cu loss of 6 kW. Its…

A: Given Two multiple choice questions based on motors. Please find the below attachment for clear…

Q: A three-phase, 60-Hz induction motor runs at 890 r/min at no load and at 840 r/min at full load.…

Q: An 8 pole, 50 Hz slip ring induction motor runs at a slip of 2.67% on full load. The rotor…

A: Initial slip is given s=2.67%=0.0267 Resistance is given R2=0.2 ohm When torque is constant slip is…

Q: 3-A three-phase, 60-Hz, four-pole induction motor runs at a no-load speed of 1790 r/min and a…

A: In this question we will find slip , frequency of rotor at no load and full load ...Speed regulation…

Q: 2. Describe the Torque-Slip characteristics of a three phase induction motor.

A: Torque-speed characteristics of 3- phase induction motor:- As seen from the torque equation, we can…

Q: 8. Describe, in detail, how torque is developed in an induction motor, 9. What is slip in an…

A: Induction Motor An induction motor is commonly referred to as an asynchronous motor. In an induction…

Q: Draw the typical speed-torque characteristic of the induction motor and expain it.

A: Torque of an induction motor depends on Slip Armature resistance Voltage Reactance

Q: 50. A) The rotor conductors of the 3-phase double-squirrel-cage induction motor are used during the…

A: A. The rotor conductors of the 3-phase double-squirrel-cage induction motor are used during the…

Q: How can the starting torque of a three-phase induction motor be increased? a) by increasing the slip…

A: As from starting torque formula, τst=kE22.R2R22+X22 As E2 is due to ϕ and ϕ is due to supply voltage…

Q: B/ Fill in the blanks: TV ezur. 1- In a three-phase induction motor iron losses in stator will…

A: Three-phase induction motor The motor which works on the principle of electromagnetic induction is…

Q: 23. As load is increased from no load to full load on a 3-phase squirrel-cage induction motor, what…

A: " Since you have posted a question with multiple subparts, we will solve the first three subparts…

Q: Explain the term air-gap power or power developed in the rotor and shaft power. How these terms are…

A: As per the guidelines, we supposed to answer one question at a time. so please ask other questions…

Q: a) Why the slip of induction motor is never zero, b) What happens if the slip of induction motor is…

A: (a) Slip of induction motor will be zero ,if speed of rotor is equal to synchronous speed. For slip…

Q: Q1: A single-phase induction motor is rotating at a speed of 1790 rpm. Its rated nameplate is;…

Q: 1.why the slip of induction motor is never zero, 2.what happens if the slip of induction motor is…

Q: A three-phase, 460 V, 98hp 1,60 Hz, four-pole induction machine delivers rated output power at a…

A: We have an induction motor with, Supply Voltage (Vl) = 460 V Power Output = 98 hp Frequency (f) = 60…

Q: What is the effect of load on the efficiency of an induction motor?

A: The explanation is as follows.

Q: A three-phase induction motor used for a commercial application in Oman runs at 580 rpm at no load…

A: Given: A three phase induction motor No load speed = 580 rpm Speed at full load = 552 rpm To…

Q: induction motor

Q: what are the disadvantages of slip ring induction motor?

A: The slip ring induction motor, also known as a winding rotor motor, is an illustration of an…

Q: 1- To control the speed of an induction motor, the supply frequency is reduced by 10%. For the same…

A: Given, To control the speed of an induction motor, the supply frequency is reduced by 10%.

Q: Q.14. What is slip in an induction motor? Q.15. What is the value of slip at start in an induction…

A: Solution: (14) In INduction Motor sleep is defined as the ratio of the difference in synchronous and…

Concept explainers

Stator and Rotor Magnetic Field

The stator and rotor magnetic field is the resulting magnetic field generated by a system of coils that are symmetrically aligned. They are supplied with polyphase currents. The magnetic field is generated by poly-phase (two or more phases) current or single-phase current. In the latter case, two field stator windings are supplied and two resulting electromagnetic fields are generated beyond the stage.

Question

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 2 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

a) Why the slip of induction motor is never zero, b) What happens if the slip of induction motor is one, c)What is the value of the slip for an induction motor at no load and full load.
3-A three-phase, 60-Hz, four-pole induction motor runs at a no-load speed of 1790 r/min and a full-load speed of 1720 r/min. Calculate the slip and the electrical frequency of the rotor at no-load and full-load conditions. What is the speed regulation of this motor ?
L-1). The 3-phase wound-rotor induction motor has .... . a) high starting torque b) low starting current c) both "a" and "b" d) neither "a" nor "b" L-2). The 3-phase wound-rotor induction.........a) motor has a wire wound rotor b) motor's rotor can be connected to an external resistive load by way of slip rings and brushes c) motor requires more maintenance than the 3-phase squirrel-cage induction motor d) all of the above L-3). The 3-phase wound-rotor induction motor's rotor circuit's resistance should be adjusted so it is__________ during starting. a) low b) high c) either "a" or "b" d) neither "a" nor "b" L-4). Will a 3-phase wound-rotor induction motor start with no external circuit connected to its rotor leads? a) yes b) no
Torque-speed characteristics for three phase induction motor 4. Discuss the following (rated torque, starting torque, break down torque).
Type your question here A 6- pole, 50 Hz 3-phase induction motor has a full load slip of 4 percent. The rotor resistance and reactance per phase are 0.24 2 and 2 2 respectively. Calculate: a) The speed at the maximum torque and full load torque. b) The resistance to be added to the rotor circuit to obtain 60% of the
7- A 6-pole, 50-Hz, 3-0 induction motor is running at 950 rpm and has rotor Cu loss of 6 kW. Its rotor input is......kW (a) 120 (b) 60 (c) 6.3 (d) 66 8- The number of slip rings on a squirrel cage induction motor is usually (a)Two (b) Three (c) Four (d) None
A three-phase, 460 V, 98hp 1,60 Hz, four-pole induction machine delivers rated output power at a slip of 0.05. Determine: (i) The synchonous speed. (V) speed at half Load (ii) The motor speed. (iii) The rotor frequency. (iv) The slip speed. ...A... -
Ql: A single-phase induction motor is rotating at a speed of 1790 rpm. Its rated nameplate is; 150-V, 60-Hz, 4-pole. Determine its per-unit slip (a) in the direction of rotation and (b) in the opposite direction. At standstill the rotor resistance is 13 N, determine the effective rotor resistance in each branch. Q2: A single-phase induction motor with a 4-pole, 50-Hz, 130-V, is rotating in the clockwise direction at a speed of 1450 rpm. Determine its per-unit slip (a) in the direction of rotation and (b) in the opposite direction. At standstill the rotor resistance is 15 Q, determine the effective rotor resistance in each branch.
When the speed of the dc motor is varied by changing the armature resistance, is to be held constant. O field flux O applied voltage O load current O armature current The starting torque of a three phase slip ring induction motor is to a three phase squirrel cage induction motor. when compared O very low O low same O high
A three –phase, 440V, 50 Hz, 6 – pole induction motor running at 950 rpm takes 50 kW at certain load. The friction and windage loss is 1.5 kW and the stator losses = 1.2 kW. Determine the output from the rotor. (a). 42.68 kW (b). 46.48 kW (c). 48.80 kW (d). 44. 86 kW
d) A 2-pole induction motor is fed with a 230 V, 50 Hz supply and is running at no load. i. Calculate its angular speed in rpm. ii. Explain how can we slow down the speed of the motor above, at no load? iii. Explain what will happen to the speed of the motor if we slowly add amechanical load to the motor.
1. The rotor resistance and reactance per phase of a three-phase wound rotor induction motor are 0.035 and 0.15 ohm respectively. If an additional resistance is added, the starting torque is one half of maximum torque and the full load torque is three-fourth of the maximum. Determine the following: a. Full load speed b. speed at maximum torque c. value of additional resistance per required to achieve these conditions.