Referring to the formula below, what is thesynchronous speed of an AC motor that has 60Hz applied to two pole pairs?fx 60N =PEnter your answer in the space below.N =rpmWhat is the synchronous speed of an AC motorwith eight poles (four pole pairs) when the appliedAC power is 60 Hz?When is the torque of an induction motor at itshighest level?

Answered: Referring to the formula below, what is…

Referring to the formula below, what is the synchronous speed of an AC motor that has 60 Hz applied to two pole pairs? fx 60 N = P Enter your answer in the space below. N = rpm

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter35: Harmonics 916

Section: Chapter Questions

Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...

See similar textbooks

Related questions

Q: QI: 220V, 7 Hp DC series motor coupled to a fan, the motor draws 25 A and runs at 300 rpm at…

A: We are given that, Vs=220V ,Ia=armature current =25ARa=armature resistance=0.6ΩRf=field…

Q: A shunt-connected dc motor has RA=0.5 Ω and RF+Radj=400 Ω. For VT=200 V and no load, the motor runs…

A: Terminal voltage is given, Field resistance is given as, Armature resistance is given, Field current…

Q: An electromechanical process is driven by a 30-watt permanent-magnet brushless DC motor as shown…

A: Given: An electromechanical process is driven by a 30-watt permanent-magnet brushless DC motor as…

Q: Q.4/A/ Fill in The Blanks: 1- A salient pole synchronous motor is running at no load. Its field…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: What is the synchronous speed of a 4-pole synchronous machine operated in a 60Hz network and what is…

A: The rpm of the machine is calculated by using the expression as shown below: N=120fPP=number of…

Q: Find the speed of the induction machine in rpm, If the speed in rad/sec is 125…

A: given speed in the rad/sec = 125

Q: Problem 1) A synchronous motor is supplied from a 3 phase, 208V, 60HZ power supply. The field…

Q: 4.1 Which of the following statements about a squirrel cage induction motor is false? (a) It has no…

Q: A brushless DC motor whose converter's output is a

A: Brushless DC motor In a Brushless DC motor, the stator is made up of a permanent magnet in the form…

Q: A 3-phase, 4 pole, 400 V, 50 Hz, squirrel-cage induction motor is operating at a slip of 0.02. The…

A: Given a 3-phase squirrel cage induction motor having, Number of pole, P = 4 Frequency, f = 50 Hz…

Q: Q15. A synchronous machine is connected to power grid. When its operating mode changes from…

A: When a synchronous generator is connected to grid it will supply the required power to the load…

Q: If the emf in the stator of an 6 pole induction motor has a frequency of 60 Hz and that in the rotor…

A: Rotor frequency = slip× stator frequency. Motor speed = (1-slip)×synchronous speed. Sycronous…

Q: 1. The power factor of a squirrel cage induction motor istewat light load only. fr - 2. The eddy…

A: Note: Since you have not specified any question to be answered, as per our honor code, we are…

Q: 6- In a stepper motor, how is the speed of rotation determined? a) By the current supplied to the…

Q: At a location in Europe, it is necessary to supply 300 kW of 60-Hz power. The only power sources…

Q: a) The figure below shows the per-phase equivalent circuit of a two- pole three-phase induction…

A: Induction motor equivalent circuit diagram.

Q: A synchronous motor with delta conductive coils is fed from a 480V source. Its synchronous impedance…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A synchronous motor with delta conductive coils is fed from a 480V source. Its synchronous impedance…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: 1. Which of the following methods is not used for starting an induction motor? a) Adding a…

A: There are various methods of starting induction motor. resistance start, capacitor start, rotor…

Q: An industrial plant has a load of 800 kW at a power factor of 0.8 lagging. It is desired to purchase…

A: The synchronous motor converts Alternating current electrical energy into mechanical energy. The…

Q: A four-pair of pole, 50-Hz squirrel-cage induction motor runs on load at a shaft speed of 720 rpm.…

Q: 7) Short-circuit test on an induction motor cannot be used to determine: A. windage losses B. copper…

A: 7). A short circuit test on an induction motor cannot be used to determine windage losses. Answer:…

Q: Cb) At starting, the winding of a 230V, 50 Hz split-phase induction motor has the following values:…

A: Since you have asked multiple questions in a single request, we will be answering only the first…

Q: 3-phase 3730W, 220V, 6 pole and 50 Hz induction motor operates at full load with a slip of O.025.…

Q: cion 1 ne plate if an induction motor include the following data: P=5954W, cos(phi)-0.94, 50HZ,…

Q: 5.9.9 : The characteristic equation for the control system for an induction motor is (s + 4) (s + a)…

Q: Q1/ plot the no-load speed of DC motor against field current and series resistance. Rf() If N(r.p.m)…

Q: Explain how the pulsating mmf of a single-phase induction motor may be considered equivalent to two…

Q: Find the line current, shaft speed, load torque, induced torque, and rotor frequency of an induction…

Q: A 2300-V 1000-kVA 0.8-PF-lagging 60-Hz two-pole Y-connected synchronous generator has asynchronous…

Q: How can a synchronous motor be made to have a leading power factor? Select one: A. BY…

A: When we operate the synchronous motor at overexcited mode it's power factor is leading.

Q: (b) A three-phase, four-pole, 415-V, 50-Hz induction generator rated at 15-hp, is driven by a…

A: Since various parameters are provided to us, we will simply draw the equivalent circuit as done for…

Q: Determine the stability of a dc series motor with the following parameters: Ra = 1.52, Rse = 0.72,…

A: The transfer function of the system is given…

Q: A 4 pole shunt generator delivers 195 A at a terminal voltage of 245 V. Ra and Rsh are 0.032 and 702…

Q: then the frequency f =...

A: Given data: Number of poles (P)= 6 Synchronous Speed (Ns ) = 40 rev/sec Frequency (F)=? -…

Q: Choose the correct option.Marks2) ASsuming an induction motor which is workire at supply frequency…

A: The major classification of AC motors are: Induction motor Synchronous motor. An Induction motor…

Q: A 3-phase induction motor has a star-connected rotor. The rotor e.m.f. at standstill is 50V. The…

A: Given data, Emf is given, E=50 V Resistance is given R=0.5 Ω Reactance is given X=3 Ω

Q: Consider a separately-excited DC motor with an armature resistance Ra= 0.25 Nand terminal voltage…

A: Dear student as per our guidelines we are supposed to solve only one question.kindly repost other…

Q: Calculate the shaft torque for an 8 pole, three-phase AC induction motor with 20 hp, 220 V, if, at a…

Q: a. A three-phase, 50 Hz, four-pole star-connected induction motor is supplied by a three- phase AC…

Q: One industry has a 20-hp synchronous motor to perform construction rod reduction work. It is…

A: In an industry 20-hp synchronous motor is present for the rod construction work. Voltage VS=480 V,…

Q: 1- In a 3-phase induction motor running at slip 's' the mschaniçal power developed in terms of air…

A: According to Bartleby question answer rules I have to solve first question only. Because of this I…

Q: Which of the following statement is corect for the causes of low power factor O The power factor of…

A: Low power factor is mainly because of inductive loads.

Q: Question 2 A. The forward field impedance of a 0.25 hp four-pole 110-V 60-Hz single-phase induction…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: In a 3-phase, 4-pole induction motor, The power crossing the air gap of a 60 Hz is 42.6 kW, and the…

A: In this question we will find load torque of given motor...

Q: Label values of a three-phase asynchronous motor 50 Hp 60-Hz Y / ∆ 800V / 460V 34A / 59A cos (Q) =…

A: Given data, P0=50 Hp =50×746 =37.3KWcosϕ=0.85ϕ=cos-1(0.85) =31.70IL=34 A

Q: Consider a separately-excited DC motor with an armature resistance RA = 0.2 N and terminal voltage…

A: Given data: VT=130 VVf=24 VRa=0.2 ΩNr=1000 rpmIa=60 A

Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

Referring to the formula below, what is the
synchronous speed of an AC motor that has 60
Hz applied to two pole pairs?
fx 60
N =
P
Enter your answer in the space below.
N =
rpm
What is the synchronous speed of an AC motor
with eight poles (four pole pairs) when the applied
AC power is 60 Hz?
When is the torque of an induction motor at its
highest level?

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

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

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

When drawing the steady state electrical model (for an AC induction motor), is the stator armaturre inductance considered? Why/Why not?
[1] On an energy point of view, discuss why is it advantageous to run induction motors in star mode when the load less than 50%?
Select the answer Questions: 1. Synchronous motor for power factor correction operates at a. No load with over-excited fields b. No load with under-excited fields c. Normal load with minimum excitation d. Normal load with zero excitation 2. What happens if field winding of the synchronous motor is short circuited? a. First, starts as induction motor then run as synchronous motor b. Not start c. Motor will burn out d. Run as induction motor e. Other: (specify)
Draw the approximate equivalent (without Xm) circuit of an induction motor and derive the equation of the maximum torque..
IV. What are the various losses in an induction motor? On what actors do they depend?
The air-gap flux density of a two-pole induction motor is given by B=Bm cos(ωt−θ)where Bm is the peak flux density, θ is the angular displacement around the air gap, and we have assumed clockwise rotation. Give the corresponding expression for the flux density of a four-pole induction motor; of a six-pole induction motor.
The open-circuit characteristic of a shunt generator when driven at normal speed is as;Field current (A)0.51.01.52.02.53.03.5O.C. volts (V)54107152185210230240The resistance of armature circuit is 0.1 Ω. Due to armature reaction the effective field current is given by the relation Ish (eff.) = Ish − 0.003 Ia. Find the shunt field circuit resistance that will give a terminal voltage of 220 V with normal speed (a) on open circuit (b) at a load current of 100 A. Also find (c) number of series turns for level compounding at 220 V with 100 A armature current; take number of shunts turns per pole as 1200 and (d) No. of series turns for over-compounding giving a terminal voltage of 220 V at no-load and 230 V with 100 A armature current.
The open-circuit characteristic of a shunt generator when driven at normal speed is as;Field current (A)0.51.01.52.02.53.03.5O.C. volts (V)54107152185210230240The resistance of armature circuit is 0.1 Ω. Due to armature reaction the effective field current is given by the relation Ish (eff.) = Ish − 0.003 Ia. Find the shunt field circuit resistance that will give a terminal voltage of 220 V with normal speed (a) on open circuit (b) at a load current of 100 A. Also find (c) number of series turns for level compounding at 220 V with 100 A armature current; take number of shunts turns per pole as 1200 and (d) No. of series turns for over-compounding giving a terminal voltage of 220 V at no-load and 230 V with 100 A armature current.please answer only part C and D
A CI is desired for the true average stray-load loss ? (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. Assume that stray-load loss is normally distributed with ? = 2.2. How large must n be if the width of the 99% interval for ? is to be 1.0? (Round your answer up to the nearest whole
{Q.1} A three-phase induction motor runs at almost 1198 revolutions per minute (rpm) at no load and 1112 rpm at full load when supplied from a 60-Hz, three-phase source. (a) How many poles does this motor have? (b) What is the slip in percent at full load? (C) What is the corresponding frequency of the rotor currents? (D) What is the corresponding speed of the rotor field with respect to the rotor and with respect to the stator?
A three-phase induction motor, operating at rated voltage and frequency, has a startingtorque of 1.35 times and a maximum torque of 2.2 times, both with respect to its rated-loadtorque. Ignoring the effects of the stator resistance and rotational losses and assumingconstant rotor resistance, determine the slip rated load, and the rotor current at starting (as a percentage of the rotor current at rated load). The slip at maximum torque is 0.343 if that helps.
A three-phase 60 Hz induction motor connected to a three-phase bus at rated voltage isoperating at a low slip condition (i.e s < 20%) resulting in a steady state speed of 1090 rpm.(a) How many poles does the motor have?(b) What is the percentage slip at the operating speed?(c) What is the corresponding frequency, (fr) of the currents and voltages induced in therotor winding?