32. A 5-hp 220-volt four pole 60-cycle three-phase induction motor was tested and the following data were obtained: No-load test: VNL = 220 V; P₁= 310; 1= 6.2 A Load test: V₁ = 220 V; P = 3,650; 1= 11.3 A; rpm = 1,710 rpm effective AC resistance of stator per phase = 0.30 Calculate the (a.) retur copper (1) load power factor. (b.). ; (d.) (e) rotor output in watts; (f) horse power output; (g.) torque; (h.) percent efficiency;

32. A 5-hp 220-volt four pole 60-cycle three-phase induction motor was tested and the following data were obtained: No-load test: VNL = 220 V; P₁= 310; 1= 6.2 A Load test: V₁ = 220 V; P = 3,650; 1= 11.3 A; rpm = 1,710 rpm effective AC resistance of stator per phase = 0.30 Calculate the (a.) retur copper (1) load power factor. (b.). ; (d.) (e) rotor output in watts; (f) horse power output; (g.) torque; (h.) percent efficiency;

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 6RQ: Name three factors that determine the torque produced by an induction motor.

See similar textbooks

Similar questions

What are the various losses in an induction motor? On what factors do they depend? IV. V. List the different types of stray load losses in an induction motor.
Write a summary ( point) about equivalent cricuit of three phase induction motor .
An 8 pole, 50 Hz slip ring induction motor runs at a slip of 2.67% on full load. The rotor resistance per phase of the winding is 0.2 ohm. What external resistance per phase must be added in the rotor circuit so that the motor now runs ate a slip of 17.33% such that the torque remains same in both the cases. (Ans: 1.1 ohm)
1.why the slip of induction motor is never zero, 2.what happens if the slip of induction motor is one, 3.what is the value of the slip for an induction motor at on load and full load
A three –phase, 440V, 50 Hz, 6 – pole induction motor running at 950 rpm takes 50 kW at certain load. The friction and windage loss is 1.5 kW and the stator losses = 1.2 kW. Determine the output from the rotor. (a). 42.68 kW (b). 46.48 kW (c). 48.80 kW (d). 44. 86 kW
Explain torque speed/torque slip characteristics of 3 phase induction motor.
1-What is the effect of load on the efficiency of an induction motor?
If a single - phase induction motor is disconnected from 220 V, 50 Hz AC power supply, and the stator windings are energized with DC power. In this case, will the motor speed up, reverse and turn in the opposite direction or come to a stop, quickly? ...
A 3 phase, 400-V, 50 Hz 4 pole induction motor is fed from a 3-phase supply and runs of 1425 rpm. The frequency of the rotor emf 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
3. Describe the Volts per Hertz Control for three phase induction motor.
V. List the different types of stray load losses in an induction motor.