Answered: What is synchronous speed? Select one:…

What is synchronous speed? Select one: A. MOTORS THAT SPIN AT THE SAME SPEED B. DIRECTION OF ROTATION C. THE RPMS OF THE MOTOR D. THE SPEED OF THE ROTATING MAGNETIC FIELD

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter57: Dc Variable-speed Control-motor Drives

Section: Chapter Questions

Problem 5SQ

See similar textbooks

Related questions

Q: Provide your recommendations for reduction of magnetic losses in an induction motor.

A: The energy expended when an alternative magnetic field works on a Ferro-or ferrimagnetic material,…

Q: Whether a D.C. machine runs as a generator or as a motor, the following quantity maintains the same…

Q: A 900 rpm, 6-pole generator has a simplex wave winding. There are 300 conductors on the armature.…

Q: An 8 poles, 50HZ, delta connected induction motor having 120 stator slots with 64 conductors in…

Q: Speed of the motor is inversely proportional to _________________. a.flux b.Supply voltage…

Q: Develop a table showing the speed of magnetic field rotation in ac machine

A: We know that the speed of magnetic field is know as synchronous speed Ns=(120f)/p Where f is the…

Q: The followings are the phasor diagram and magnetic vector diagram of a machine. (a) Determine the…

A: Synchronous machine operates as generator or as motor Bs = stator field Br = rotor field

Q: The eddy current loss in a DC machine is 600 watts when the total flux is 2, 000, 000 maxwell per…

A: In this question The eddy current loss in a DC machine is 600 watts when the total flux is 2, 000,…

Q: An infinite length wire carrying current 10A is positioned along the x-axis . a point is located…

A: By Amperes law , Magnetic field at a distance r from the line is given by uoI/(2*π*r) Also, the…

Q: Q#1(a): Illustrate the EMF equation of generator. Q#1(b): An 8-pole, lap-wound armature rotated…

Q: (b) A 6 pole, three - phase induction motor operates from a supply frequency of 60 Hz. Calculate:…

Q: Three main types of permanent magnet materials have been used in industry. Discuss their Ferrite…

Q: 3. A wire loop of width w = 3.1 cm and depth do = 4.8 cm is pulled out of the gap between two…

A: The CGS unit for measuring magnetic fields is the gauss (sign G). One gauss per square centimetre is…

Q: X1. The magnetic strength of the field poles on a permanent magnet DC motor cannot be varied. a)…

A: X1) True, because the magnetic strength of the field in permanent dc motor is fixed. X2) The speed…

Q: 2- A two-pole motor is operating at 50 Hz. Determine the synchronous speed of the rotating magnetic…

A: Given: A motor with Poles, P=2 Frequency, f=50 Hz

Q: The permanent magnetic magnetic field due to a hard magnet such as ferromagnetic iron is due to the…

A: The magnetism in ferromagnetic materials is caused by the alignment patterns of their constituent…

Q: 1. An 8-pole, wave-connected armature has 600 conductors and is driven at 625 rev/min. If the flux…

A: Consider the formula for the emf of the armature is given by, E=PNϕZ60A Here, ϕis the flux per pole…

Q: In a DC generator, the iron losses at 1000 rpm are 10 kW at a given field current. At a speed of 750…

A: In this question , dc generator is given with iron losses at different speed ...We have to find out…

Q: c) Explain the reason for the speedup and slow down of an electron in atomic orbit placed in…

A: In the magnetic field, there are varies changes in the election speed in orbit. The speed of the…

Q: 111/ The armature reaction of the DC generator reduces the generated EMF. Select one: True False

A: In a DC generator, the voltage is induced in the armature coils due to the flux produced by the…

Q: Q.36 Name three factors that determine the torque produced by an induction motor. Select one or…

A: Those three factors are following in which torque depends upon:- i) the magnitude of rotor current.…

Q: A rectangular moving coil of a milliammeter is wound with 30 turns. The effective axial length of…

Q: Q25) i) What are the factors that the induced voltage in three phase induction motor depends upon…

A: Factors that the induced voltage in three phase induction motor depends upon : 1. Magnitude of…

Q: The armature of a 2-pole 200 V generator has 400 conductors and runs at 300 RPM. Calculate the…

A: Given: P=2V=200 VZ=400N=300 rpmTurns/Coil=1200

Q: A 6-pole, wave-connected armature has 831 conductors and is driven at 612 RPM. If the flux per pole…

A: We know direct formula for generated emf

Q: A 3-phase, 60 Hz, Y-connected, AC generator has a stator with 60 slots, each slot contains 12…

A: AC generators are used to generate electrical energy. It converts mechanical energy in the shaft to…

Q: Assume the stator and rotor magnetic fields of a motor, "Bs" and "BR." are in x-y plan. If the angle…

Q: A)The left hand rule for a coil is such that if you were to hold a coil in your left hand with your…

A: The explanation is as follows.

Q: 15.The difference between input and l'R loss will give the a) Friction loss b) Windage loss c) Core…

A: In this question we will write about dc motor torque dependness and core loss in machine etc...

Q: Torque developed by electrical motor acts in the opposite direction with direction of rotation of…

Q: What part of a motor produces an inductive magnetic field within itself to facilitate the rotating…

A: The squirrel cage of a motor produces an inductive magnetic field when the supply given to the…

Q: The armature coil of a generator with 56 conductors on it rotates in a magnetic field with a…

A: Given, Total conductors, Z=56 Magnetic flux density, B=1.68 T Effective area of coil, A=1120…

Q: The armature of a 2-pole 200 V generator has 400 conductors and runs at 300 RPM. Calculate the…

A: Back emf=∅×N×Z60×PA From above relation we will find Flux per pole. From faradays law we will find…

Q: A 3-phase, 4-pole, 400-Hz, Y-connected AC generator has a stator with 48 slots, each slot contains…

A: In this question we will find speed of rotation of stator magnetic field in RPM...

Q: A simple generator has a square armature 9.0 cm on a side. The armature has 80 turns of…

A: In the circuit, Find the value of frequency f. We know Emf = 4.44fN Φm . All parameters are given.

Q: An electron moves perpendicularly in a 5T magnetic field with a speed of 2 * 106m / s What is the…

A: Given parameters are: Magnetic Field, B=5T Speed,v=2×106 ms Charge on electron,qe=1.6×10-19C Mass…

Q: in a motor that has a rotating magnetic field, the speed of that magnetic field is referred to as

A: (The motor is an electromechanical device that converts electrical energy into mechanical energy)…

Q: permanent magnet has a uniform flux of 14,000 lines between the pole faces, what must its area be to…

A: In this question we need to find a are of permanent magnet.

Q: A 4-pole generator has a wave-wound armature with 722 conductors, and it delivers 100 amperes on…

A: According to the question we have to find armature demagnetizing and cross magnetizing ampere turns…

Q: T or F, modify the wrong part if False, please underline twice your answer if True or False.…

A: Remember in a dc motor torque is proportional to product of magnetic flux and armature current.

Q: H.W/ Fill in the blanks with the correct sentences. 1. Conditions required to generate a uniform…

A: Since we are allowed to solve only up to three sub parts of a question the below solution contains…

Q: .A four-pole generator generates 300 volts when operated at 1600 RPM. If the average flux per pole…

Q: The electromagnet device with the above geometric and electromagnetic parameters is placed in the…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: plz help! A dc generator is rated at 19 kWkW , 250 VV, and 76 AA when it rotates at 1200 rpmrpm .…

Q: Find the number of poles required, if the frequency is 50 Hz and speed of the motor is 500 rpm.

A: Given a motor having, Frequency, f= 50 Hz Speed of motor, Ns= 500 rpm

Q: The terminal voltage of a given generator .4 :depends on these two things )1 نقطة( .The field…

A: Given The terminal voltage of the given generator

Q: Q6|| Answer the Following Questions: 1-Explain the construction and principle of operation of a D.C…

Q: V a w

A: Faraday disc generator is also known as Homopolar generator (or) Disc dynamo (or) unipolar generator…

Q: Q4) In DC motor, Which of the following is given for the direction of force. a. Shaft b. Fleming's…

A: In a DC motor, the direction of force, B and I(current) are to be found.

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

Q.29

What is synchronous speed?

Select one:

A. MOTORS THAT SPIN AT THE SAME SPEED

B. DIRECTION OF ROTATION

C. THE RPMS OF THE MOTOR

D. THE SPEED OF THE ROTATING MAGNETIC FIELD

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

VIEW

Step 2

VIEW

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

Q.36 Name three factors that determine the torque produced by an induction motor. Select one or more: A. THE ARRANGEMENT OF THE STATOR WINDINGS B. THE PHASE ANGLE DIFFERENCE BETWEEN ROTOR AND STATOR FLUX C. THE SPEED OF THE CUTTING ACTION D. THE STRENGTH OF THE MAGNETIC FIELD OF THE STATOR E. THE NUMBER OF TURNS OF WIRE IN THE ROTOR F. THE STRENGTH OF THE MAGNETIC FIELD OF THE ROTOR
How many armature conductors are there in a duplex lap-wound generator given the following information: Total Flux = 2.73 x 106 Maxwell, Poles = 4, Rpm = 1200, Eg = 240
How many armature conductors are there in a duplex lap-wound generator given the following information: Total Flux = 2.73 x 106, Poles = 4, Rpm = 1200, Eg = 240
22 The DC voltage is generated in the Armature winding of DC Generator. Select one: True False
plz help! A dc generator is rated at 19 kWkW , 250 VV, and 76 AA when it rotates at 1200 rpmrpm . The resistance of the armature windings is 0.34 ΩΩ . Q1:Calculate the "no-load" voltage at 1200 rpmrpm (when there is no circuit hooked up to the generator). Q2:Calculate the full-load voltage (i.e. at 76 AA ) when the generator is run at 780 rpmrpm . Assume that the magnitude of the magnetic field remains constant.
Determine the magnetic flux (per pole) in a 100-V, 780 watts, PM motor operating at a speed of 1500 rpm. The motor constant is 88, the armature resistance is 0.7 Ω, and the rotational losses are (50) W
Find the slip of the motor, frequency is 50Hz for the 4 pole machine, when Ns=1500rpm.
The stator of a 3? , 8-poles machine has 96 stator slots and short-pitched by 9/12.The airgap flux density shows that third and fifth harmonics are present and are of amplitude30 and 15 percent of the fundamental. Determine the ratio of the line-to-line voltage and linenatural voltage
Using the following informations: Determine the magnetizing reactance at 60 Hz of the induction motor referred to the stator. (in ohms per phase)
Q5) Identify the machine where the Rotating magnetic field is produced. a. Three Phase Induction Motor b. DC Motor c. DC Generator d. Transformer
A 6 pole generator has a lap wound armature with 40 slots and 20 conductor per slot. The lux per pole is 25mWb. Calculate the speed at which the machine must be driven to generate an EME of 300 v
8) Which part of the DC machine spread out the magnetic flux? a. Field Pole b. Commutator c. Armature d. Yoke