Given below is the specification from the Single phase Induction motor nameplate: 0.75 kW, 1 HP,...
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Given below is the specification from the Single phase Induction motor nameplate: 0.75 kW, 1 HP, 230 V, 5.21 A, 1400 r/min, 4 poles. Using the Excel workbook, determine the motor characteristics for:
For a motor frequency of:
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Given below is the specification from the Single phase Induction
motor nameplate: 0.75 kW, 1 HP,...
Three-phase induction motor The three-phase induction motor nameplate gives the following informa...
Three-phase induction motor The three-phase induction motor nameplate gives the following information: 100 HP, 6 poles, 600 V, 60 Hz, PF =0.87. Rated motor slip s=0.0275 and rated motor current is 91.7 A. Measured at rated speed friction and ventilation losses are 1100 W. Measured between two motor terminals resistance is 0.305 Ω. f) For a load such where the motor rotates at the speed of 1180 r / min, determine shaft torque and calculate the mechanical power in HP,...
If an AC induction motor says in nameplate that the power is 100 HP, and it...
If an AC induction motor says in nameplate that the power is 100 HP, and it has an efficiency of 88%. It is operating at a 90% of full load. What is the input kW to the motor?
a 3 phase 440v induction motor has produced an output power of 75 hp and full...
a 3 phase 440v induction motor has produced an output power of 75 hp and full load efficiency of 91% and power factor of 83%. A calculate nominal line current B if stator resistance per phase is .1omh what are copper losses at stator ? C if losses are 1.2 kw what is power delivered to rotor d determine i2r losses in rotor . E what is slip f synchronous speed is 1800 rpm what is the speed of motor
A 10 hp, 60 Hz, three-phase induction motor is delivering rated power while running at 864...
A 10 hp, 60 Hz, three-phase induction motor is delivering rated power while running at 864 rpm. The motor is drawing power from a 208 V, three-phase source. DC tests determine: R1 0.2 ? and R2-0.15 ?, we do not know XI and X2. Ignore XM. The rotational and core losses are 200 W and 100 W respectively. Find: a) The output (shaft torque). b) The number of poles. c) The input power and efficiency d) The power factor at...
1. A 15 hp, 4 pole, 208 V, 60 Hz, Y-connected, three-phase squirrel cage induction motor has the ...
1. A 15 hp, 4 pole, 208 V, 60 Hz, Y-connected, three-phase squirrel cage induction motor has the following parameters in Ω/phase referred to the stator: R,-0.220, Xi = 0.430, X,-15.0, R2 0.130 and X2-0.430. Mechanical and core losses amount to 300 W and 200 W respectively for rated voltage. (a) The motor is fed with a 60 Hz, 208 V voltage. It runs with a slip of 4.5 %. Find the speed, shaft torque and power, efficiency and power...
1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed...
1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed of 103 rad/s and a speed regulation of 5% at rated load. Find the amount of slip (in rpm) at full load for this motor. 2.. A 2 HP, 240 VAC, 60 Hz, capacitor-start motor is 75% efficient and draws 10 A at full load. What is this motor's power factor at rated load? 3. A wound rotor, 3 phase induction motor in Mr....
Q10. A three phase, 100-hp, 2400V, 6-pole, 50 Hz induction motor is tested, with the following...
Q10. A three phase, 100-hp, 2400V, 6-pole, 50 Hz induction motor is tested, with the following test results obtained: No-load test (at 50 Hz) Block-rotor test (at 12.5 Hz) 420 35 11500 Signal Voltage (V) 2400 Current (A) 10 Power (W) 4200 Stator resistance is measured at 1.75 Ω per phase. a) Find the parameters of the equivalent circuit b) At a slip of 0.25, calculate the power and torque output and the efficiency of this motor. Ans. : a)...
10.17.A split-phase motor has this information on its nameplate: 3/4 hp 1,725 rpm 13.8/6.9 A Full-load...
10.17.A split-phase motor has this information on its nameplate: 3/4 hp 1,725 rpm 13.8/6.9 A Full-load power factor: 0.70 Insulation class B Code U 115/230 V The motor is wired for low-voltage operation. (a) What is the synchronous speed of this motor? (b) What is the maximum locked-rotor cur rent it should draw if wired for 115-V opera- tion? (c) What is the full-load torque (lb ft)?
1. A three phase, 60 Hz, 100-hp, 440V, Y-connected induction motor runs at 864 rpm when...
1. A three phase, 60 Hz, 100-hp, 440V, Y-connected induction motor runs at 864 rpm when it operates at rated load. Calculate the following 1. Number of poles of the machine. 2. slip at full load. 3. Rotor frequency. 4. speed of rotor field with respect to the stator. 5. speed of the rotor magnetic field with respect to the stator magnetic rotating field.
Example 20-4. A 200 hp (150 kW), 460 V, 3-phase, 3520 r/min, 60 Hz induction motor has a locked-rotor torque of 600 Nom and a locked-rotor current of 1400 A (same motor as in Example 20- 2). Two auto...
Example 20-4. A 200 hp (150 kW), 460 V, 3-phase, 3520 r/min, 60 Hz induction motor has a locked-rotor torque of 600 Nom and a locked-rotor current of 1400 A (same motor as in Example 20- 2). Two autotransformers, connected in open delta, and having a 65 percent tap, are employed to provide reduced-voltage starting. Calculate a. The apparent power absorbed by the motor b. The apparent power supplied by the 460 V line c. The current supplied by the...
A 10 hp, 60 Hz, three-phase induction motor is delivering rated power while running at 864 rpm. The motor is drawing power from a 208 V, three-phase source. DC tests determine: R1 0.2 ? and R2-0.15 ?, we do not know XI and X2. Ignore XM. The rotational and core losses are 200 W and 100 W respectively. Find: a) The output (shaft torque). b) The number of poles. c) The input power and efficiency d) The power factor at...
1. A 15 hp, 4 pole, 208 V, 60 Hz, Y-connected, three-phase squirrel cage induction motor has the following parameters in Ω/phase referred to the stator: R,-0.220, Xi = 0.430, X,-15.0, R2 0.130 and X2-0.430. Mechanical and core losses amount to 300 W and 200 W respectively for rated voltage. (a) The motor is fed with a 60 Hz, 208 V voltage. It runs with a slip of 4.5 %. Find the speed, shaft torque and power, efficiency and power...
1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed of 103 rad/s and a speed regulation of 5% at rated load. Find the amount of slip (in rpm) at full load for this motor. 2.. A 2 HP, 240 VAC, 60 Hz, capacitor-start motor is 75% efficient and draws 10 A at full load. What is this motor's power factor at rated load? 3. A wound rotor, 3 phase induction motor in Mr....
Q10. A three phase, 100-hp, 2400V, 6-pole, 50 Hz induction motor is tested, with the following test results obtained: No-load test (at 50 Hz) Block-rotor test (at 12.5 Hz) 420 35 11500 Signal Voltage (V) 2400 Current (A) 10 Power (W) 4200 Stator resistance is measured at 1.75 Ω per phase. a) Find the parameters of the equivalent circuit b) At a slip of 0.25, calculate the power and torque output and the efficiency of this motor. Ans. : a)...
10.17.A split-phase motor has this information on its nameplate: 3/4 hp 1,725 rpm 13.8/6.9 A Full-load power factor: 0.70 Insulation class B Code U 115/230 V The motor is wired for low-voltage operation. (a) What is the synchronous speed of this motor? (b) What is the maximum locked-rotor cur rent it should draw if wired for 115-V opera- tion? (c) What is the full-load torque (lb ft)?
1. A three phase, 60 Hz, 100-hp, 440V, Y-connected induction motor runs at 864 rpm when it operates at rated load. Calculate the following 1. Number of poles of the machine. 2. slip at full load. 3. Rotor frequency. 4. speed of rotor field with respect to the stator. 5. speed of the rotor magnetic field with respect to the stator magnetic rotating field.
Example 20-4. A 200 hp (150 kW), 460 V, 3-phase, 3520 r/min, 60 Hz induction motor has a locked-rotor torque of 600 Nom and a locked-rotor current of 1400 A (same motor as in Example 20- 2). Two autotransformers, connected in open delta, and having a 65 percent tap, are employed to provide reduced-voltage starting. Calculate a. The apparent power absorbed by the motor b. The apparent power supplied by the 460 V line c. The current supplied by the...
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