In the design of a permenant magnet bearing for a wind turbine shaft what forces are acting on th...
maxima minima
69, Eiciency of wind turbines A wind turbine into electrical power. Let vi equal the upstream vel wind before it encounters the wind turb downstream velocity of the wind after it passes thequal swept out by the turbine blades. A wind turbine converts win stream velocity of the App f(x) sin r cos.r con fo)--2 In( 1) f(x) (sin1)(COs ) the rig fx)- a Minin volume where etermine the location and What an n the given interval, if...
If a 25-kW (rated) wind turbine has a three-phase, 480-V generator, what minimum size wire will be needed for each phase to connect the wind turbine to a load that is 50 m away? Remember, you need to count the length of wire down the 25-m tower. Peak power can be 30 kW. Calculate maximum current and reduce it by a factor of 1.7 because the system is three-phase. Each leg (wire) of the three-phase system carries 1/3 of the...
Distinguish between a common bar magnet and an electromagnet. What is the cause of a magnetic field about a common bar magnet? What is the cause of a magnetic fields in an electromagnet?How are electric motors and electric generators similar? Different? How do they each make use of electromagnetic induction?What does a transformer do? How does it make use of electromagnetic induction? What correction do you make to a friend who states that a step-up transformer boosts energy, while a...
A transfer shaft with two spur gears shown below: Input Gear 1 Output Gear Torque Bearing 1 Gear 1 Gear 2 Bearing 2 B OTO 4" 4" 4" 4 . . Weight Ibf Teeth number Pressure angle Po (diametric pitch) teeth/in Gear A 50 20° 6 Gear C 2 25 20° 6 Deep groove ball bearings at B and D. Pitch diameter of the gear is equal to the teeth number divided by diametric pitch. Shaft speed = 3000 rpm....
III. Mapping the Field Around a Bar Magnet: An Observation Experiment Purposes: Design an experiment to take appropriate data to find a relationship. Construct a mathematical model to describe that relationship Description: Your task is to use a compass to map the magnetic field of a small magnet. Construct a circle of radius 10 cm on a clean sheet of paper, and mark points on the circle every 30°. Place the bar magnet so that its center is resting at...
In F=ma when summing the forces, I know they must all be in the same direction (along with the acceleration), but should they all be acting on a single point also (or acting relative to a point)? So if you had two forces acting on an object and say one is acting on the center and one is acting on some distance from the end, you must set up an origin point, and have two position vectors from the origin...
1. The stack of magnets works as one big bar magnet. Do the poles change when you divide the magnet into pieces? 2. In step 3 of the experiment, do both sides of the magnet attract the metal surface? Explain how a single magnet can repel the rest of the stack, but still stick to the other surface. 3. How does the magnet attract something that is originally non?magnetic? 1. Describe the direction of the compass needle as you moved...
power = 3 kW
if need any more information please ask !!!
You are the designer and you have been asked to design a speed reducer (gearbox) that will take power from the shaft of an electric motor rotating at 1500 rpm and deliver it to a machine that is to operate at approximately at 200 rpm Assume that you have decided to use spur gears to transmit the power [A power equal to the last one digits of your...
(Step 2.6) There were two questions concerning the forces acting on the carts connected by a string that you were to ponder: [a.] Which object, the string (between the carts) or cart A, exerts a force directly on cart B? Which object, the string or cart A, has a force acting directly on It from cart B? [b.] In light of your answers to the above question, do the forces measured in steps 2.1 through 2.4 (that is, the forces...
power plant / Steam Turbine/ i need solution in 24 hour
7.1 How does a steam turbine convert energy in steam to shaft work? 7.2 What do you understand by (a) a nozzle, (b) a diffusor? 7.3 What is a compressible fluid? 7.4 What is the velocity of a pressure pulse in an isentropic flow? 7.5 What is the velocity of sound in an ideal gas? On what factors does it depend? 7.6 What is a stagnation state? 7.7 What...