A 3-phase, 1.5 kW, 415 V, 2-pole, 50 Hz, 2910 rpm induction motor delivers rated output power to a load. If the rotational loss is 150 W, determine the air-gap power.
Question
A 3-phase, 1.5 kW, 415 V, 2-pole, 50 Hz, 2910 rpm induction motor delivers rated output power to a load. If the rotational loss is 150 W, determine the air-gap power.
Solution
The air-gap power (P_ag) of an induction motor can be calculated using the formula:
P_ag = P_out + P_rot
where: P_out is the output power, and P_rot is the rotational loss.
Given in the problem, P_out = 1.5 kW = 1500 W (converting kW to W) and P_rot = 150 W.
Substituting these values into the formula, we get:
P_ag = 1500 W + 150 W = 1650 W
Therefore, the air-gap power of the induction motor is 1650 W.
Similar Questions
10 kW, 6-pole, 50 Hz, 3- phase induction motor has linear torque-slip characteristicsbetween zero torque and maximum torque. The slip at which maximum torque of 520 Nmoccurs is 0.2. For mechanical losses of 600 W, find the speed at which motor would run whiledelivering rated shaft power.
A 400 V, 3 phase mesh connected synchronous motor runs at rated voltage and with excitationemf of 510 V. Its synchronous impedance per phase is 0.5+j0.4 Ω and friction, windage andiron losses are 900 W. Calculate the shaft power (or net) output, line current, pf and efficiencyfor (a) maximum power output and (b) maximum power input
A 400 V, 5- Hz, 3-phase delta connected, 6-pole induction motor has following standstillleakage impedances per phase referred to stator:z1 = 1.2 + 2.1j ohm , Z2 =1.32 + 2.2j ohm.Neglecting magnetizing impedance, determine(a) gross output power at a slip of 0.04,(b) thechange in line current when the stator terminals are switched from star to delta at a slip of0.4,(c) the resistance to be added in each rotor phase to obtain a starting torque of 350 Nm
2 pointsA three-phase 415 V, 50Hz, 8 pole induction motor is operated from an inverter in six- step mode. Determine the value of DC-bus voltage (VDC). VDC = 586V VDC = 650 V VDC = 532V VDC = 800V2 pointsIf switching frequency of an induction motor drive is 750 Hz and fundamental frequency is 50 Hz, the pulse number is- 15 4 9 82 pointsAn induction motor drive is operating with synchronous sine-triangle PWM having maximum switching frequency of 1000 Hz. If motor drive is operating at 50 Hz fundamental frequency, suggest a suitable switching frequency for the drive to ensure all the waveform symmetries. 650 Hz 200 Hz 1000 Hz 750 Hz2 pointsA 415 V 50Hz, star connected, 3 phase squirrel cage induction motor is operated from an inverter at 30 Hz fundamental frequency. What is the fundamental output voltage of inverter if drive is operating at rated torque? 400 V 249 V 350 V 440 V2 pointsA three-phase 415 V, 50Hz, 8 pole induction motor drive is operating at 20 Hz with a slip value of 0.06. The output voltage of inverter consists of fundamental and dominant 5th harmonic component. Compute the slip with respect to 5th harmonic voltage component. 1.18 0.93 0.59 0.08
The starting torque of a three-phase induction motor can be increased by:
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.