A three-phase induction motor runs delivering 9 kilowatts to its load at efficiency of 88 %. If the stator copper losses represent 50% of total losses , the stator copper losses equal * O 619 W O 614 W O624 W 605 W

Q: Correct the power factor for a motor connected in series with a 120V RMS 60Hz power supply. The…

A: The power demand remains constant in a given circuit. Small power factors will cause more and more…

Q: A 3 hp ,380 V, three-phase induction motor has 0.85 p.f and efficiency of 80% .The full load current…

A:

Q: Please answer with diagram please answer in typing format

A: Step 1:

Q: QUESTION 5 Correct the power factor for a motor connected in series with a 120V RMS 60HZ power…

A: This question belongs to network theory . It is based on the concept of power factor correction for…

Q: Q/ 16 pole nine slot per pole 500 rpm Turns/phase 360 Flux per pole 0.0534 web Tow slot Find :- Kd…

A:

Q: A 3-phase induction motor draws 50 kW from a 220 V, 50 Hz mains. The rotor emf makes 100…

A: Given, A 3-phase induction motor draws, Electrical input = 50 kW Stator losses = 2 kW Supplied…

Q: Three coils each having resistance of 14 0 are connected in delta across 414 V, 50 Hz supply. Then…

A:

Q: If the base kVA is 25,000 then a 5000 KVA alternator with 8% reactance will have Select one: OaA 4%…

A: Given, Base kVA, SBnew=25000 kVA. Alternator kVA, SBold=5000 kVA. Reactance, Xold=8%.

Q: The characteristics of the Smith chart are summarized as follows

A: Characteristics of the Smith chart are summarized as follows:  The Smith Chart is used to display…

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

A:

Q: The output power in the induction motor of 1200 W input power and 87% efficiency is: Select one:…

A: Given data, Input power Pin=1200 W Efficiency η=87 %=0.87

Q: An alternator having 20 poles and running at 600 rpm will generate alternating voltage and current…

A: Frequency of alternating voltage =poles×speed120. Given poles= 20 and speed=600 r.p.m.

Q: A flux of 19 mWb links with a 1340 turns coil and the inductance of 12 H. The value of energy stored…

A: Given that  Flux = 19 m Wb No. of turns = 1340 turns ] Inductance = 12 H  Energy stored in inductor…

Q: When the load on a series generator is increased, then the flux produced will be decreased. Select…

A: According to question we have to discuss about change in flux.

Q: The synchronous speed of a four-pole induction motor operating at 50Hz is A 25 rps B C D 40 rps 35…

A: Given Data:-Pole=P=4frequency=f=50Hz

Q: The maximum power that can be generated by a wind turbine is called Select one: O Cut-in Power O…

A: Rated power is the maximum power that any plant will generate.

Q: At stand still condition the slip of the induction machine is 1 0 Infinite value none

A: Given, The induction machine is at standstill.

Q: Given the logic circuit, determine the Boolean expression of the output and simplify to a minimum…

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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: direct current generator operates on the basis of   Lenz’s law   Ohm’s law   Faraday’s law of…

A: A dc current generator works as fallows: Whenever a conductor placed in fluctuating magnetic field…

Q: Before closing the synchronism switch to connect two alternators in parallel, it is observed in a…

A: Given: A set of 3 lamps

Q: Three coils each having resistance of 26 Q are connected in star across 438 V, 50 Hz supply. Then…

A: Need to find power

Q: across the j16 2 j40 2 ணை j40 2 24 2 100 V/30° ( -jl Q j4 2 =-j82 -j10 2= j10 2 j9 2 10 Ω 32 8 Ω ll…

A: Assume 100[30°] is a RMS Value.

Q: A 3-phase induction motor runs at 3% slip and develops mechanical power equal to 10 kW. The air gap…

A: In this question,  We need to determine the air gap power of the induction motor?  Here slip s= 3% =…

Q: If the induction motor absorbs 50 kW, and the stator copper and iron losses amount to 6 kW and 1 kW,…

A: Given an induction motor with, Input power = 50 kW Stepper copper losses = 6 kW Iron losses = 1 kW

Q: A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be…

A: The solution is given below

Q: (TRU Three phase induction motor is a self- starting motor.

A:

Q: A single phase AC motor draws 4.5 A from 220 V electricity. Three various power of the motor from…

A: Given Data Single Phase AC motor I = 4.5 A V = 220 V P = 720 W

Q: To achieve maximum output power from an alternator load angle is shifted till critical angle. The…

A: The load angle is moved till critical angle to get maximum output power from alternator. Then the…

Q: In experiment 5, the terminal voltage of the generator increases with in load.

A: Terminal volatge of dc generator increases  with decrease in the load.

Q: 9. An alternating current and a direct current flow simultaneously in the same conductor. If the…

A: Given data, DC current Idc=11 A Effective value of Alternating current that is RMS current IAC=5 A

Q: A 3-phase induction motor runs at 3% slip and develops mechanical power equal to 10 kW. The air gap…

A: Given, A 3-phase induction motor runs at, Slip, s = 3 % = 0.03 Mechanical power, Pm=10 kW

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.