A 3-phase star connected, 440 V (line to line) 50 Hz 8 pole induction motor has the following has the following constants in ohms per phase referred to stator: R1=0.1 Ohm, X1=0.33 ohm, R2’=0.17 ohm, X2’= 0.3 ohm, Xm=15 ohms. Find rotor current referred to stator and stator current when motor is running with 700 rpm

A 3-phase star connected, 440 V (line to line) 50 Hz 8 pole induction motor has the following has the following constants in ohms per phase referred to stator: R1=0.1 Ohm, X1=0.33 ohm, R2’=0.17 ohm, X2’= 0.3 ohm, Xm=15 ohms. Find rotor current referred to stator and stator current when motor is running with 700 rpm

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 13RQ: A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is...

See similar textbooks

Similar questions

Why are different motor connections shown for what appears to be the same motor in the various diagrams in Figure 332? FIG. 332 Typical arrangements for four-speed, three-phase, two-winding motors.
A 3-phase, 4 pole, 230 V, 60 Hz wound-rotor induction motor has both its stator and rotorconnected in Y. The rotor has half as many turns per phase as the stator. If the rotor is runningat 1725 rpm, Rr is 0.075 ohms and Xs = 0.375 ohms, determine the torque developed by themotor.
A 3-phase, 4 pole, 230 V, 60 Hz wound-rotor induction motor has both its stator and rotor connected in Y. The rotor has half as many turns per phase as the stator. If the rotor is running at 1725 rpm, Rr is 0.075 ohms and Xs = 0.375 ohms, determine the torque developed by the motor. The result should be in lb-ft The answer given was 27.543 lb-ft
An approximate per phase equivalent circuit of a 3-phase, 220-V, wye-connected, 6 pole, 60 Hz induction motor is shown in figure below for which R1 = 0.3 ohm; X1 = 0.4 ohm; R’2 = 0.4 ohm; X’2 = 0.6 ohm; Xm = 15 ohms. For the given numerical values calculate the total developed(electromagnetic) torque in (kg-cm) .The motor speed is 1080 rpm.
A 3-phase, star connected 440 V squirrel cage induction motor has the following equivalent circuit parameters in ohms per phase referred to stator: R1 =0.1=R2;X1 =0.4=X2;Xm =10.Determine: (a) the starting current of the motor, when switched direct on line, and (b) the stator current at the start of reverse current braking.
59 ۱۱:۶۳ ص | ۲۰۰۸ك.بث | A 460 V.pdf A 460 V, 60 Hz, Star connected, 870 r.p.m., Eight poles, Three-Phase Induction Motor has the following per phase parameters: R1 = 0.07, R2 = 0.05, X1 = X2 = 0.2, Xm = 6.5, Draw the approximate equivalent circuit and determine the following: 1. III. IV. V. VI. VII. Starting Torque Maximum Torque Rated Torque Stator Current Power Factor Input Power Magnetizing Current †
A 3-phase, 4 pole, 230 V, 60 Hz wound-rotor induction motor has both its stator and rotor connected in Y. The rotor has half as many turns per phase as the stator. If the rotor is running at 1725 rpm, Rr is 0.075 ohms and Xs = 0.375 ohms, determine the torque developed by the motor. Answer: 27.543 lb ft
4 pole Y connected 380V 50Hz ı induction motor has following parameters referred to stator. Rstator=0,4 ohm Xstator=0,4 ohm Rrotor=0,3 ohm Xrotor=0,3 ohm s=0,06 Xm=21 ohm. Core losses are ignored i) Find nom Torque? ii) When half of the nominal frequency and voltage are applied to the induction motor, what will be the speed assume that torque is constant given in part i?
A 6-pole, 60 Hz, wye connected, 40 horsepower, 1140 rpm induction motor draws 33.5 kW of power from a 3-phase source when operating at rated conditions. At rated conditions, the motor has the following losses: stator copper loss = 1000 W core loss = 500 W a) What is the efficiency of the motor? b) What is the rotor copper loss? c) What is the mechanical loss? d) What is the torque developed by the motor? HANDWRITTEN PLEASE Please all subpart is compulsory for like this please
Draw the circle diagram for a 5.6 kW, 400-V, 3-φ, 4-pole, 50-Hz, slip-ring induction motor from the following data :No-load readings : 400 V, 6 A, cos φ0 = 0.087 : Short-circuit test : 100 V, 12 A, 720 W.The ratio of primary to secondary turns = 2.62, stator resistance per phase is 0.67 Ωand of the rotor is 0.185 Ω.
3-phase, star-connected, 220 V line to line, 50-Hz, 4-pole induction motor has the following constants in ohm per phase referred to stator. r1 = 0.29, r2 = 0.14, X1 = 0.5, X2 = 0.21 and magnetizing reactance X0 = 13.25 ohms .The total friction windage and core lose may be assumed to be a constant at 400 watts. For a slip of 2 percent calculate: a.)Speed b.)Output, and c.) Stator current of the motor
Solve the following problems with complete solutions using two(2) decimal digits. 1. The rotor of a 220-V., 60 Hz, 4-pole induction motor has a power input of 80 kW is observed that the rotor emf makes 90 cycles per minute. Calculate the rotor copper loss. 2. A 40-HP, 230-V., 8-pole, 25 Hz three-phase induction motor is running at 355 rpm at rated load. The torque lost by friction is 24 N-m. If the stator losses amount to 1,000 W., calculate the efficiency of the motor at this load. 3. A 6-pole, 50 Hz, 3-phase induction motor runs at 960 rpm while delivering a shaft torque of 120 N-m. If friction and windage loss amount to 180 W., determine the rotor copper loss.