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A 415 V, 5 kW, 50 Hz, 4-pole, 3-phase wound-rotor induction motor has the following characteristics:
The magnetising current, core losses and rotating losses can be neglected for this question.
The motor is started direct on-line from a 415 V 50 Hz three phase supply.
(a) Calculate the starting current.
(b) Calculate the starting torque.
(c) Discuss how the starting current could be limited for this wound-rotor motor.
(d) If the motor is running at a speed of 1450 rpm, calculate the mechanical output power.
Calculate the centroid (use point A as the reference) and the moment of inertia of the shape shown in Figure. The dimensions are given in centimeters. Calculate the moment
Find out the velocity of the system: Blocks A and B of mass 20 kg and 45 kg, respectively are associated by a weightless rope over a frictionless pulley as shown in Figure a).
First we focus on the inner region fluid (0 (solid body rotation) around the z-axis. The steady incompressible velocity field is given by ur=0 utheta=rw uz= 0. The pressure at th
Embrittlement For use, at high strength, coupled with good notch toughness, all weld structure must be Tempered low carbon martensite. Carbon and alloy steels having more than
Q. Explain System and Parting sand? System Sand: In mechanized foundries, where machine moulding is employed a so called "system sand" is used to fill the whole flask. Since
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Compute the maximum bending moment: A simply supported beam of 7 m length carries point loads 2 kN, 4 kN and 6 kN at distances of 1 m, 2 m & 4 m from the fixed end respectivel
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