Homework Answers
625 rpm requires (625/875)*60 = 42.8 Hz
This in turn requires (42.8/120)*10 = 3.57 volt input contriol voltage
Add Answer to:
10. A VFD has an output frequency range of 0-120 Hz with an input control voltage of 0-10 volts d...
3. A four poles 3-0 induction motor at rated voltage and frequency, f = 60 Hz,...
3. A four poles 3-0 induction motor at rated voltage and frequency, f = 60 Hz, has the following torque ratios: - Maximum torque = 2.5; and Tst Starting torque mx =- = = Rated torque Rated torque 1 Use the simplified torque equation and calculate the rated speed of the motor (the speed in rpm at rated torque).
A 120-V (line-neutral) wye-connected 4-pole 60-Hz three-phase induction motor is operating at 100% of its 10-kW...
A 120-V (line-neutral) wye-connected 4-pole 60-Hz three-phase induction motor is operating at 100% of its 10-kW rated output shaft power at 5% slip. What is the frequency of the rotor electrical currents in Hz?
D) Find the voltage regulation and officiency tof all the cases in part part (c) above. (e) above...
d) Find the voltage regulation and officiency tof all the cases in part part (c) above. (e) above. 2. (25) A three-phase, 12 HP, 220 V, 60 Hz, Y connected induction motor is running at 1728 rpm while delivering rated torque. The induction motor has the following equivalent circuit model parameters: R1-0.1 Ω, X1-040 R2-0.16Ω, X2 1Ω, and XM Ignore core losses. 20 Ω Find: (Hint: Reasonable engineering approximations are encouraged.) a) The shaft torque. b) The motor efficiency. Hint:...
You purchase a motor in Germany designed to run at 415 Volts, 50 Hz. It has 75 kW output power, runs at 2978 RPM and has 240 N-m of rated torque. You ship it Canada and run it at 480 Volts, 60 Hz. Wha...
You purchase a motor in Germany designed to run at 415 Volts, 50 Hz. It has 75 kW output power, runs at 2978 RPM and has 240 N-m of rated torque. You ship it Canada and run it at 480 Volts, 60 Hz. What will be the new torque in N-m? (Round your answer to the nearest integer).
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....
44. The direction of rotation of an induction motor depends on a. the frequency of the...
44. The direction of rotation of an induction motor depends on a. the frequency of the input voltage b. the strength of the magnetic field set up c. the phase sequence of the input supply lines and order in which they are connected to the stator windings d. whether the windings are connected in delta or star determines the speed of the rotating magnetic field a. the number of poles in the motor b. the frequency of the supply d...
3. A full wave rectifier bridge has a input voltage of 120Cos(1207nt) and the output of...
3. A full wave rectifier bridge has a input voltage of 120Cos(1207nt) and the output of the rectifier is given by |120Cos(120nt)|. Suppose this rectifier output is connected to a series and L 7.95 mH.Then, find the Fourier series of the output current 6. Also, tabulate the rms RL load with R 4 waveform up to n = phasor voltage, impedance and rms phasor current for frequency values of 0, 120 ,240, and 360 Hz
A three-phase 4 pole wye connected 220 V, 15 Hp, 50 Hz induction machine (rated conditions) has t...
A three-phase 4 pole wye connected 220 V, 15 Hp, 50 Hz induction machine (rated conditions) has the following parameters per phase refereed to the stator. RI : 0.29 Ω , R2 0. 14 Ω , Xi-0.50 Ω , X2-0.20 Ω , Xm-1 0.53 Ω The total windage and core losses can be assumed to be a constant 350 W. If the machine is operating at rated voltage and frequency with a 5.5% slip, find the steady-state: (a) 10pts. Mechanical...
4. A three-phase induction motor has the following data: Nominal power, P 7.5 kW Nominal voltage, = 400 V Connection: Y Nominal frequency, f-50 Hz Nominal speed, nn 960 rpm Stator resistance, r,...
4. A three-phase induction motor has the following data: Nominal power, P 7.5 kW Nominal voltage, = 400 V Connection: Y Nominal frequency, f-50 Hz Nominal speed, nn 960 rpm Stator resistance, r, 0.55 Ω Rotor resistance referred to a stator winding phase: r:-0.51 Ω Stator leakage inductance, L,-4.4 mH Rotor leakage inductance referred to a stator winding phase,1'-4.4 mH Magnetising inductance L-65 mH How many pole pairs has the motor? 12] a. Calculate the nominal power factor of the...
The three-phase wye-connected induction motor nameplate gives the following information: 400 V, 1755 rpm, 60 Hz....
The three-phase wye-connected induction motor nameplate gives the following information: 400 V, 1755 rpm, 60 Hz. Rotor speed at no-load is 1799 rpm. At rated voltage and frequency motor core losses are 400 W. At rated rotor speed, mechanical losses are 400 W. The available parameters of the motor conventional equivalent circuit (6-parameters IEEE model) are: R1 = 0.2 Ω, R’2 = 0.2 Ω, X1 = 0.5 Ω, X’2 = 0.2 Ω and Xφ = 20.0 Ω. In all calculations,...
3. A four poles 3-0 induction motor at rated voltage and frequency, f = 60 Hz, has the following torque ratios: - Maximum torque = 2.5; and Tst Starting torque mx =- = = Rated torque Rated torque 1 Use the simplified torque equation and calculate the rated speed of the motor (the speed in rpm at rated torque).
d) Find the voltage regulation and officiency tof all the cases in part part (c) above. (e) above. 2. (25) A three-phase, 12 HP, 220 V, 60 Hz, Y connected induction motor is running at 1728 rpm while delivering rated torque. The induction motor has the following equivalent circuit model parameters: R1-0.1 Ω, X1-040 R2-0.16Ω, X2 1Ω, and XM Ignore core losses. 20 Ω Find: (Hint: Reasonable engineering approximations are encouraged.) a) The shaft torque. b) The motor efficiency. Hint:...
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....
44. The direction of rotation of an induction motor depends on a. the frequency of the input voltage b. the strength of the magnetic field set up c. the phase sequence of the input supply lines and order in which they are connected to the stator windings d. whether the windings are connected in delta or star determines the speed of the rotating magnetic field a. the number of poles in the motor b. the frequency of the supply d...
3. A full wave rectifier bridge has a input voltage of 120Cos(1207nt) and the output of the rectifier is given by |120Cos(120nt)|. Suppose this rectifier output is connected to a series and L 7.95 mH.Then, find the Fourier series of the output current 6. Also, tabulate the rms RL load with R 4 waveform up to n = phasor voltage, impedance and rms phasor current for frequency values of 0, 120 ,240, and 360 Hz
A three-phase 4 pole wye connected 220 V, 15 Hp, 50 Hz induction machine (rated conditions) has the following parameters per phase refereed to the stator. RI : 0.29 Ω , R2 0. 14 Ω , Xi-0.50 Ω , X2-0.20 Ω , Xm-1 0.53 Ω The total windage and core losses can be assumed to be a constant 350 W. If the machine is operating at rated voltage and frequency with a 5.5% slip, find the steady-state: (a) 10pts. Mechanical...
4. A three-phase induction motor has the following data: Nominal power, P 7.5 kW Nominal voltage, = 400 V Connection: Y Nominal frequency, f-50 Hz Nominal speed, nn 960 rpm Stator resistance, r, 0.55 Ω Rotor resistance referred to a stator winding phase: r:-0.51 Ω Stator leakage inductance, L,-4.4 mH Rotor leakage inductance referred to a stator winding phase,1'-4.4 mH Magnetising inductance L-65 mH How many pole pairs has the motor? 12] a. Calculate the nominal power factor of the...
Most questions answered within 3 hours.
-
Question 1: For each of the sections in this part, the
competitive market for labor is...
asked 2 minutes ago -
A runaway train car that has a mass of 1.71e+4 kg travels at a
speed of...
asked 4 minutes ago -
Lincoln, Inc., which uses a volume-based cost system, produces
cat condos that sell for $170 each....
asked 9 minutes ago -
Q23 Suppose H0 is left-tailed and tTest = -2.26. (Note tTest not
zTest). The tTest value...
asked 4 minutes ago -
On November 3, the spot price for cotton was $0.81/lb., and the
February futures price was...
asked 10 minutes ago -
Using Python:
A Prime number is an integer greater than 1 that cannot be
formed by...
asked 32 minutes ago -
Read about Cokes strategy in Africa in the article below and
discuss the ethics of selling...
asked 19 minutes ago -
What made of a 40.0% NaOH solution should be diluted to 1.00 L
with water to...
asked 19 minutes ago -
Draw and describe the results of the Meselson-Stahl experiments
showing that DNA replication followed the Semi-conservative...
asked 24 minutes ago -
Deeply Explain the Following Web Development Softwares Along
With the Reasons to Choose them For Development....
asked 21 minutes ago -
essay question: why was Hurricane Katrina so devastating? How
and why did the levees break in...
asked 26 minutes ago -
Why might it be necessary to reduce consumer spending in order
to attain faster economic growth?...
asked 35 minutes ago