The test results for the approximate equivalent circuit of a three-phase induction motor are shown below....

The test results for the approximate equivalent circuit of a three-phase induction motor are shown below.
No-load test: equivalent applied voltage 120 V, input current 5 A, equivalent input 480 W
Restraint test: Applicable voltage 20V, input current 40A, equivalent input 480W

Determine the equivalent circuit constants of Rc, Xm, Rs + Rr, and Xs + Xr
when friction and wind losses are ignored.

Answer - 30Ω, 40Ω, 0.3Ω, 0.4Ω

Expert Solution

answer is attached..

Manojponduru answered 1 year ago

The single-phase equivalent-circuit parameters for a three-phase induction motor in ohms-per-phase are R1=0.17 R2=0.24 X1=1.05 X2=0.87...

The single-phase equivalent-circuit parameters for a three-phase induction motor in ohms-per-phase are R1=0.17 R2=0.24 X1=1.05 X2=0.87 Xm=82.1 Rc=435 For a slip of 5 percent, and a terminal voltage of 460 V, line to line, calculate: A) Calculate the motor phase current and input real and reactive power. B) Calculate the mechanical output power and the power dissipated in the rotor. You might assume that the motor friction and windage losses are 270W C) Calculate the motor core loss and the...

Electric Machinery What are the advantages of using three-phase induction motor as compared to single phase...

Electric Machinery What are the advantages of using three-phase induction motor as compared to single phase induction motors? please write it with long details and with clear written

A 400V, three phase, 50Hz, 4 pole induction motor is operating at a per unit slip...

A 400V, three phase, 50Hz, 4 pole induction motor is operating at a per unit slip of 40KW from the suppply. Under these conditions stator losses amount to 2.2 KW and rotational losses due to friction and windage amount to 1.4KW. Calculate the net horsepower and torque developed.

A 3 phase 450V (line-to-line), 1150rpm induction machine has the following equivalent circuit parameters. R1=0.33 Ohms,...

A 3 phase 450V (line-to-line), 1150rpm induction machine has the following equivalent circuit parameters. R1=0.33 Ohms, X1=1.3Ohms R2 = 0.25 Ohms X2 = 40Ohms. Determine the following: a) Rated stator current (per-phase) b) Input power factor c) Total power across the air gap d) The full-load torque e) Magnitude of the starting current

Present the single-phase equivalent circuit of a synchronous generator.

Brief discuss the operation of a split phase single phase single induction motor with respect to...

Brief discuss the operation of a split phase single phase single induction motor with respect to its construction, current relationship and torque characteristics. Illustrate your answer by means of diagram

A 400V, 2 pole, 50 Hz, three-phase induction motor is drawing 60 A at 0.85 PF...

A 400V, 2 pole, 50 Hz, three-phase induction motor is drawing 60 A at 0.85 PF lagging. The stator copper losses are 2 kW, the stator core losses are 1.8 kW and rotor copper losses are 700 W. The friction and windage losses are 600 W, the stray loss 100 W, and rotor core loss 100 W. Find the following quantities: a. The air gap power. b. The developed mechanical power. c. The output power. d. The efficiency of the...

A 6-pole and three-phase induction motor has synchronous speed of (1000) RPM. a) Find the no-load...

A 6-pole and three-phase induction motor has synchronous speed of (1000) RPM. a) Find the no-load and full-load operating speed of motor for the cases given, 1. 2.5Hz electrical frequency of rotor for no-load condition. 2. 6.3Hz electrical frequency of rotor for full-load condition. b) Find the speed regulation of motor by using parameters found above. c) Determine the electrical frequency of rotor under full-load condition so that speed regulation would be equal to 5%? (Electrical frequency of rotor for...

A three phase 30 hp 460 volt 60 hz, 1770 rpm design B induction motor with...

A three phase 30 hp 460 volt 60 hz, 1770 rpm design B induction motor with class F insulation and service factor of 1.0 is operating at rated shaft load in a 40 degree C environment and has an expected 20 yr life. A maintenance check shows line to line voltages to be 449.2 V, 431.3 V and 462.4 volts. The percent unbalanced voltage for this motor is: the expected temperature rise equals? The expected insulation life equals? the rerating...

A three phase 10kW, 1700rpm, 60Hz, four poles, Y connected induction motor has a no-load speed...

A three phase 10kW, 1700rpm, 60Hz, four poles, Y connected induction motor has a no-load speed of 1750rpm. The rotational mechanical losses are constant and equal to 500W. The core losses are constant and equal to 300W. The copper losses in the stator equal to the copper losses in the rotor at full load. If the rotor resistance per phase is 0.25?, calculate the following: a.The frequency of the induced current in the rotor circuit at full load. b.The percentage...

Question