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1. Why is DFIG not considered for motoring applications for speed range from zero to rated speed?
2. Equation relates stator voltage, rotor voltage, and torque. Use a spreadsheet program to develop a macro to plot a family of curves in relation to the input parameters.
Assume the following machine parameters Rs = 0.598 Ω, Rr= 0.271 Ω, Lls = 3 mH, Llr = 1.2 mH, Vs = 220 V, Vr = 10 V, p = 4, and ωe = 377 rad/s. 11.5 Study the article by Da Silva et al.19 Propose a modern and contemporary circuit and control techniques to achieve a similar system performance for a DFIG wind- or hydro-based energy system
A ball of moist clay falls 19.8 m to the ground. It is in contact with the ground for 19.5 ms before stopping. What is the average acceleration of the clay during the time it is in contact with the ground
What is t he steam-side coefficient
Determine the angle theta¸ (in degrees) if the two positions of the first order spectral line are 38.0 cm and 62.0 cm. Assume the distance from the diffraction grating to the slit is 55 cm
The engine of a model rocket is rated with a total impulse of 5.00 N seconds and a thrust duration of 1.20 seconds. What is the average force exerted by the engine? I believe the answer is 4.17 N. I need to see each step and formula to solve this ..
A turbine fan in a jet engine has a moment of inertia of 2.5 kgm^2 about its axis of rotation. Find the fan's angular momentum and the net torque acting on the fan as functions of time
a bowling ball with a mass of 5 kg and traveling with a velocity of 4 ms-1 collides with an aluminum ball of 4 kg
The lowest note on a grand piano has a frequency of 27.5 Hz. The entire string is 2.00 m long and has a mass of 450g. What tension is needed to tune this string properly
A point charge of +4Q is placed at the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 3 N acts on the positive charge at the square's center.
47 kilogram uniform rod 4.80 meter long is attached to a wall with a hinge at one end. determine how far from the wall can a 67.0 kilogram person sit without breaking the wire
A uniform meter stick is supported by a knife edge at the 50 centimeter mark and has masses of 0.40 kilogram and 0.60 kilogram hanging at the 20 centimeter and 80 centimeter marks, respectively
Two forces, F1= (1.35i-0.95j)N and F2= (-0.85i+1.20j)N are applied on a moving object of mass 0.30 kg. What is the work done by the two forces
Write a book report (in MS Word format), indicating the key steps in Feynman's original derivation of Kepler's First Law from the Law of Universal Gravitation, using only high-school algebra and trigonometry. Draw some key diagrams to clarify the ..
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