A 400-V, 18-hp, 50-Hz, four-pole, A-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: R1= 0.5 ohm XI=1 ohm R2=0.4 ohm X2= 1.2 ohm Xm = 80 ohm The total rotational losses are 1.5 kW. The core loss is lumped in with the rotational losses. For a rotor slip of 5 percent at the rated voltage and rated frequency: 1- Draw the motor three phase equivalent circuit. 2- Find the motor speed 3- Find the stator current 4- Find the line current 5- Find the stator power factor
A 400-V, 18-hp, 50-Hz, four-pole, A-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: R1= 0.5 ohm XI=1 ohm R2=0.4 ohm X2= 1.2 ohm Xm = 80 ohm The total rotational losses are 1.5 kW. The core loss is lumped in with the rotational losses. For a rotor slip of 5 percent at the rated voltage and rated frequency: 1- Draw the motor three phase equivalent circuit. 2- Find the motor speed 3- Find the stator current 4- Find the line current 5- Find the stator power factor
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Transcribed Image Text:Question 8:
A 400-V, 18-hp, 50-Hz, four-pole, A-connected induction motor has the following
impedances in ohms per phase referred to the stator circuit:
RI= 0.5 ohm XI=l ohm R2=0.4 ohm X2= 1.2 ohm Xm = 80 ohm
The total rotational losses are 1.5 kW. The core loss is lumped in with the rotational
losses. For a rotor slip of 5 percent at the rated voltage and rated frequency:
1- Draw the motor three phase equivalent circuit.
2- Find the motor speed
3- Find the stator current
4- Find the line current
5- Find the stator power factor
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