A 460V, 25hp, 60Hz, 4 pole, Y-connected induction motor has the following impedances in ohms per phase referred to the stator circuit:  R1 = 0.641 Ω         R2 = 0.332 Ω  X1 = 1.106 Ω         X2 = 0.436 Ω          Xm = 26.3 Ω  The total rotational losses are 1100W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 3.5% at the rated voltage and rated frequency, find the motor’s Speed Stator current Power factor Pconv and Pout Ʈǐnd and Ʈload Efficiency

Q: At startup, line connected induction machines can draw up to X times their rated current. 4 0.5

A: The rotor impedance of the induction motor when parameters are referred to the primary: Z=Rs+jX At…

Q: Q5. Which of the following types of 1-phase induction motor has the lower power rating? (a)…

A: Shaded Pole Induction Motor: The motor consists of salient poles and a squirrel cage rotor. A…

Q: 11 kV at a power factor of 0.867lagging. Each machine supplies half the total power. The synchronous…

A:

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Q: Select the following condition on three phase induction motor which gives very low value of slip. O…

A: Choose the correct option Which condition gives low value of slip on 3 phase induction motor.

Q: B - Determine the suitable capacitor to ma between Im , Ia at starting running of singl with a…

A: According to question:

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A: The most suitable DC genrator for arc welding is Differential compund genrator.

Q: 17. A small single phase, 240 V induction motor is tested in parallel with 160 N resistor. The motor…

A: It is given that: V=240 VR=160 ΩIm=2 AIT=3 A

Q: When 40V DC voltage is applied to a single-phase AC motor, it draws 1A current. When 200v-50Hz AC is…

A: When a dc voltage is applied , the power consumed will be real power = 40*1 = 40 W (v*I). When ac…

Q: 45. A 3-phase, 5 kW induction motor has a p.f. of 0.75 lagging. A bank of capacitors is connected in…

A: Given: A 3-phase, 5 kW induction motor has, Power factor, cosϕ1=0.75 lagging…

Q: What are rotor faults in alternators

A: The rotor of an alternator is directly connected with field winding of the alternator whenever there…

Q: What component of a DC generator rectifies the internally produced alternating current into DC

A: In a DC generator, AC current is produced inside the rotor winding. The current is taken out from…

Q: A synchronous generator has 15 slots per pole. If each coil spans 7 slot pitches, the value 0.5877…

A: Pitch factor (Kp)=cosα2Coil span angle =βshort pitch angle =α(β)+ (α)=180°

Q: The power supplied to a three-phase induction motor is 20kW and the stator losses are 1000W. If the…

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Q: In three-phase induction motor rotor speed is always greater than synchronous speed. Select one: O…

A: In induction motor the rotating magnetic field which is produced in the starter will generate flux…

Q: In long shunt DC generator Series field winding current Ise is equal to

A: -The circuit diagram for long shunt DC generator is given below:

Q: The load sharing between two parallel connected synchronous generators may be adjusted by varying…

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Q: Draw and label both the power and control circuit of a 3 phase DOL induction machine starter

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Q: If a 4-pole induction motor has a synchronous speed of 1500 r.p.m., then, supply frequency is

A: Given an induction motor with, Total number of poles, P = 4 Synchronous speed, Ns=1500 rpm Supply…

Q: If the voltage is 400v its 3 phase its frequency is 50hz it has 4 poles per phase its running speed…

A: Step 1:

Q: One of essential condition for paralleling two DC generators is     Equal current     Correct

A: Paralleling of DC generators is performed to have greater reliability.

Q: A pump station uses an induction motor that requires a complex power of S1 = 55<30° kVAand a…

A:

Q: A centre zero ammeter connected in the rotor circuit of a 6-pole 50 Hz induction motor makes 30…

A: Given- 6-pole 50 Hz induction motor, No. of poles p=6, frequency f=50 Hz, 30 oscillations in 1…

Q: Q4 a) Determine the suitable capacitor to make 90° electrical between Im and la at starting running…

A: Types of single induction motor Capacitor start IM Permanent  split capacitor Wound Rotor Two valve…

Q: The rotor power output of three phase induction motor is 15 kW. What would be the rotor copper loss…

A: Given the rotor power output of three phase induction motor is, Rotor Po/p=15 kW Slip, s = 4 % =…

Q: ompare between 2-phas notor and universal moto

A: On the basis of the construction and working principle there are various types of motors like…

Q: If a 16 m/s wind is blowing on a wind turbine and the tips of its blades are rotating at 60 m/s.…

A: tip speed ratio =  speed of blade/ wind speed  speed of blade = 60m/s wind speed = 16 m/s

Q: B - Determine the suitable capacitor to make 90° electrical between Im , la at starting running of…

A: Given : Zm=2.4+j3.8ΩZa=7.8+j3.2Ω

Q: False True The speed of d.c shunt motor is decreased if the field current is increased Wave windings…

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

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.