Driving torque in electromagnetic induction relay is proportional to the square of current in relay coil True False

Q: Driving torque in electromagnetic induction relay is proportional to the square of current in-relay…

A: TRUE

Q: 1. Calculate the synchronous speed of 60-Hz induction motors having four poles 2. Calculate the…

A: (1) Given: Frequency, f = 60 Hz. Number of poles, P = 4

Q: What is the electrical angle in degrees if the developed reluctant torque attained maximum value in…

A: Solution: The reluctance torque of a salient pole synchronous motor is, Trel=V221Xq-1Xdsin2δ…

Q: We use stroboscope to calculate the torque of three- phase induction motor?* True False

A: Scroboscope is used to measure the speed of induction motor.

Q: Explain briefly the differences of induction motor & synchronous motor.

A: The primary distinction between induction motor & synchronous motor is that in synchronous…

Q: An 3-phase induction motor(IM) has full load slip = 0.5%. If the rotor circuit resistance is…

A:

Q: The rotor resistance per phase of a 4-pole, 50 Hz, 3-phase induction motor are 0.024 and 0.1. ohm…

A: Given induction motor with  Rotor resistance R2=0.024 ΩRotor reactance X2=0.12 Ωpoles p=4frequency…

Q: (ii) Write-down the equations of the following in three phase induction motor. (i) rotor speed. (ii)…

A:

Q: Explain in detail the braking of Induction Motors

A: The three types of breaking of induction motor are, 1. Regenerative 2. Plugging Braking 3. Dynamic…

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

A:

Q: H.W/ Draw and Explain Power flow diagram for an induction motor

A: Power flow diagrams help us to understand how power is flowing within an electromechanical device.…

Q: The dc series motor has a linear torque- speed characteristics. O True O False

A: The dc series motor has a inverse torque-speed characteristics.

Q: A three phase induction motor with supply frequency of 60 Hz , 6 poles. If the slip is 5 % at a…

A:

Q: three phase induction motor with supply frequency of 60 Hz, 8 poles. If the slip is 2.5 % at a…

A:

Q: How can we calculate the speed of the induction motor provided that the induction motor drive keeps…

A: Speed Control of IM There are many methods to control the speed of IM. Variable Voltage Control…

Q: 5. After performing an experiment on the Capacitor Start induction motor to determine the effect of…

A: Capacitor Start induction motor is a type of induction motor. in which capacitor is used to start…

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

A: Given Data N = 586 full load speed = 546 oman frequency = 50 Hz

Q: This question refers to a three-phase induction motor. which statement are false (A) The slip speed…

A: According to question:

Q: The operating region of an induction motor is split into 3, namely low slip, medium slip and high…

A: The rotor frequency (fr) = slip (s) times the supply frequency (f)                     fr = s f

Q: 2. What is the speed of an induction motor of six poles at 60 HZ, if the percent slip is 2.5 %?

A:

Q: A 6-pole, wound induction motor operates from a 3-phase , 50 Hz supply. The rotor parameters are…

A: It is given that: P=6f=50 HzR2=0.192X2=0.552

Q: Q3: Fill in the blanks with an appropriate word, when loading a three-phase induction motor, which…

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

Q: E-1). The amount of torque developed by a 3-phase squirrel-cage induction motor from no-load to…

A: There are three descriptions are given about the induction motor.

Q: Define the following AC Motors, the principles of operation and uses 1. Synchronous Motors 2.…

A:

Q: Q12. Can we increase the starting torque of an induction motor by connecting additional resistors in…

A: An induction motor (also known as an asynchronous motor) is a commonly used AC electric motor. In an…

Q: the type of three-phase induction motor, which is used for high starting torque application a.…

A: In this we will write about induction motor used for high starting torque..

Q: (c) Discuss briefly the behaviour of a three-phase squirrel cage induction motor if a full voltage…

A: At the starting  Rotor speed is less or can consider it zero Slip =1 Write equation of current as…

Q: An induction motor has rotor resistance of 6 (ohm) and reactance of 8(ohm). Neglect stator…

A: Given values are - Rotor resistanceR2=6OhmRotor reactanceX2=8OhmStator resistanceR1=0OhmStator…

Q: The rotor resistances per phase of a 4-pole, 50-Hz, 3-phase induction motor are 0.024 ohm and 0.12…

A: Given information are: Rotor Resistance,R2=0.024Ω Rotor Reactance,X2=0.12Ω Number of poles of…

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

A:

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: (A)Give a clear explanation of the following effects in a three-phase induction motor: (1) the…

A:

Q: Q17. What will be the locked rotor torque developed at unity machine constant by single phase…

A: Given, Zm =1.5+j2.5Za =8+j8so,Im =1201.5+j2.5=41.60∠-59.03oIa  =1208+j8=10.60∠-45o

Q: Q2. a) Why the slip of induction motor is never zero, b) What happens if the slip of induction motor…

A: The slip in an induction motor is the difference between the main flux speed and their rotor speed.…

Q: Explain in detail the Starting of Induction Motors

A:

Q: a) Explain how the power flows in an induction machine, where losses occur and how they can be…

A: a)  To know how the power flow in case of induction machine we need to draw power flow diagram. Here…

Q: Question 3 Explain in detail the Starting of Induction Motors

A: According to question we have to explain in detail the starting of Induction Motors.

Q: Which of the following application, 3-phase squirrel cage induction motors are normally used? O…

A: There are two types of induction motors based on their construction: Squirrel cage and slip ring…

Q: A 30 synchronous machine has the following parameters: X₁-0.9 pu, X,-0.65 pu The field current of…

A: Given Xd =0.9 pu Xq =0.65 pu Open circuit voltage Vt=1 pu Machine is synchronized to infinite bus…

Q: Q5 : For a three-phase induction motor , explain briefly the following with mention the necessary…

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

Q: A 34, 460 V, 100 hp, 60 Hz, four-pole induction machine delivers rated output power at a slip of…

A: Given data, The value of power is P = 100 hp. The value of voltage is V = 460 V. The value of…

Q: A 380V 50Hz Δ-connected induction motor, its R2=2.5Ω, and I2=25A. For a rotor slip of 3% at rated…

A: In the question following data is given  Input voltage 380 volt Rotor line current = 25 Amp Rotor…

Q: Q4) Is an induction motor self-starting? Clarify this on the Torque/Speed characteristics

A: Self starting motors are the motors which don't require any external startup to develop initial…

Q: then the frequency f =...

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

Q: A) At what percentage of slip is the pull-out or breakdown torque of a typical 3-phase squirrel-…

A: Pull out torque is also called as maximum torque. And can also be called as breakdown torque. If the…

Q: A three-phase induction motor used for a commercial application in Oman 50HZ runs at 584 rpm at no…

A: No-load speed = 584 rpm Full load speed = 546

Q: Why do we need to have brushes in a squirrel-cage rotor type induction motor? (short answer

A: In this question we will write about brushes in induction motor.....

Q: b) Briefly explain the differences between synchronous motors and induction motors. You should…

A: Difference between synchronous and asynchronous motors are :- Synchronous motor does not have slip.…

Q: 3. Why does the starting current extremely high in Induction Motors? Support your answer with…

A: In Induction motor , starting current is extremely high or not?  At Starting speed of rotor Nr = 0…

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.