THREE PHASE INDUCTION MOTOR
Explain the effects of the capacitors on the values of the line current and the PF.
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THREE PHASE INDUCTION MOTOR Explain the effects of the capacitors on the values of the line...
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,...
A three-phase induction motor is to be supplied through a 50 meter length.Determine the conductor size if the motor power is 10 KW, at a pf 0.8 (lagging) assume that the cable drawn in plastic tube.
A 1.6-hp, 8-pole, 60-Hz, three-phase induction motor is rated for 820 rpm, 220 V rms (line-to-line), and 4.32 A (line current) at 77.0 percent lagging power factor. Find the full-load efficiency if the motor is delta-connected and if it is wye-connected.
A three-phase 60 Hz induction motor 480 v (rms, line- to line), lo tp, spee is 12 amperes (rms), total stator Copper loss is Copper loss is 150 W, total combine with operation at the specified paramders, a) The number of Poles ! induction motor has specifications as follows R- to line), lo tp, speed is 1765 RPM, line Current stal Stator Copper loss is 140 w, total rotor is 15o W , total combined rotational loss is losw the...
(b) Explain why starting torque and running torque are different in three phase induction motor. (2 marks)
The three-phase average power of a synchronous motor is 23kW. The three-phase line supplying the motor has a line voltage rating of 208 V (rms). The line current is 75A per phase. Determine the power factor and the reactive power absorbed by the motor/
A three phase, 60 Hz, 4-pole, Y-connected, 460 V induction motor has the following values: R1=0.54 Ohm R2=0.5 Ohm Xm=51.10 Ohm X1 =2.09 X2=3.21 Ohm It operates with a slip of 0.02 rated input voltage with mechanical losses of 150 W, core loss of 150 W, and stray losses of 50 W. Find the Line current magnitude and the load torque.
A three phase induction motor draws a starting current which is five times the full load current with direct on line starting, while developing twice the full load torque. Q2.1. Based on the two facts that starting current is proportional to the applied voltage and that the starting torque is proportional to the square of the applied voltage, determine voltage (as a per cent of rated voltage) required to obtain a starting torque equalling the full load torque. (10 marks)...
A three phase, 60 Hz induction motor rated at 440 V and 40 hp drives a load at 1710 rpm. The induction motor has the following impedances referred to the stator in /phase: R,=0.1512, X,=0.7512; R2=1.222,X=0.7522; X=25 12 . The core loss is 450 W and friction and windage loss is 250 W. Calculate the following 1. line current and power factor 2. Real and reactive input power 3. Air-gap power 4. Mechanical power and torque developed 5. shaft horse...
Problem # 2: Induction Motor Analysis Using The Thevenin Theorem [37 points] A three-phase, two pole, 25hp, 460V (line-line), 60Hz, wye-connected, squirrel-cage induction motor has the following per-phase parameters: Ri 0.53 Ohm X2 0.80 Ohm Xi 1.80 Ohms R2 0.30 Ohm Re- 400 Ohms Xm 25.0 Ohms You cannot use any approximate circ uit or any approximation in the calculations. (1) Determine the parameters of the Thevenin equivalent circuit. Draw the equivalent circuit with the appropriate parameter values indicated on...