A- A 3 phase, 415 V, 50Hz, Y-connected, 6 pole, wound rotor induction motor has the following pephase parameters referred to the stator side: (R1= Negligible, X1=1 Q, R2=0.30, X2=0.60,Xm=30, Rc= Infinity). Find : The starting torque? The maximum torque? The speed at maximumtorque?B- Derive an expression for pitch factor in armature winding of a synchronous machine?

Step 1:Step 2:Step 3:Step 4:Step 5: Derivation of chording factor:Coil span or coil pitch is defined…

Answered: A- A 3 phase, 415 V, 50Hz, Y-connected,…

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...

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Name three factors that determine the torque produced by an induction motor.
I need the answer as soon as possible
An 3-phase induction motor(IM) has full load slip = 0.5%. If the rotor circuit resistance is increased so that R2new =2R2old, then the slip at which the motor develops the same full load torque is=.. * ......
1- To control the speed of an induction motor, the supply frequency is reduced by 10%. For the same magnetizing current to remain constant, the supply voltage must be....... a) Reduced by 10%, b) Reduced by 20%, c) Increased by 10%, d) Increased by 20% 2. When maximum starting torqua ic ohtoinod
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3. A 440V 60-hp six pole 60 hz A connected induction motor has the following parameters R1=0.048 R2= 0.035 Xm= 9.50 X1= 0.33 0 X2= 0.37 0 Pcore= 600W PF&W= 350W Use the Thevenin's Equivalent circuit concept to find: (a)Vth and Zth seen by the rotor circuit (b)The slip at which maximum torque occurs (c) the value of Max/pullout Torques (d) The starting torque.
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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
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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
A wound rotor, induction motor has a rotor resistance of 0.6 ohms per phase and a rotor leakage reactance of 8 ohms.a)What is the operating speed (rpm) of this 2-pole induction motor fed from a 50Hz supply if the slip is 5%?b)If maximum torque occurs when R2 = sX2, what is the slip at maximum torque?c)What resistance must be added to the rotor circuit to give maximum startingtorque?
A 6-pole, wound induction motor operates from a 3-phase, 50 Hz supply. The rotor parameters are R2=0.192/phase and X2=0.552/phase. Calculate the speed at which maximum torque occurs and the value of external resistance necessary in the rotor circuit from this torque to occur the starting. Ans[800r.p.m., 0.492/phase]

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