A 400-V, 15-hp, 50-Hz, six-pole, A-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: R1= 0.5 ohm XI=0.8 ohm R2=0.6 ohm X2= 1.2 ohm Xm = 60 ohm The total rotational losses are 0.5 kW. The core loss is lumped in with the rotational losses. For a rotor slip of 7 percent at the rated voltage and rated frequency: 1- Draw the motor three phase equivalent circuit. 2- Find the synchronous speed. 3- Find the motor speed

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A 400-V, 15-hp, 50-Hz, six-pole, A-connected induction motor has the following
impedances in ohms per phase referred to the stator circuit:
RI= 0.5 ohm XI=0.8 ohm R2=0.6 ohm X2= 1.2 ohm Xm = 60 ohm
The total rotational losses are 0.5 kW. The core loss is lumped in with the rotational
losses. For a rotor slip of 7 percent at the rated voltage and rated frequency:
1- Draw the motor three phase equivalent circuit.
2- Find the synchronous speed.
3- Find the motor speed
4- Find the line current
5- Find the stator current
6- Find the stator power factor
7- Find the Im current (excitation branch current)
8- Find the rotor current
9- Fond the rotor power factor
10-Find the PsCL
11- Find the PAG
12- Find PrCl
13- Find Pconv
14- Find the efficiency
Transcribed Image Text:A 400-V, 15-hp, 50-Hz, six-pole, A-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: RI= 0.5 ohm XI=0.8 ohm R2=0.6 ohm X2= 1.2 ohm Xm = 60 ohm The total rotational losses are 0.5 kW. The core loss is lumped in with the rotational losses. For a rotor slip of 7 percent at the rated voltage and rated frequency: 1- Draw the motor three phase equivalent circuit. 2- Find the synchronous speed. 3- Find the motor speed 4- Find the line current 5- Find the stator current 6- Find the stator power factor 7- Find the Im current (excitation branch current) 8- Find the rotor current 9- Fond the rotor power factor 10-Find the PsCL 11- Find the PAG 12- Find PrCl 13- Find Pconv 14- Find the efficiency
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