Generator Definition and 1000 Threads

Homework Statement My son and I have built a wind turbine following the plans on: Build your own Wind Turbine Designed by Dave Mussell http://www.re-energy.ca/docs/wind-turbine-cp.pdf" . These plans were inspired by the Picoturbine: link to manufacturer and link to PDF. We used 30 AWG...

I am building an axial flux generator with dual rotor and single stator. I was doing calculations and have a magnet pole pair question i need help with, there are 12 magnets on each rotor with North pole on one rotor across from South pole on the other rotor. Since there are 24 total magnets...

Homework Statement In a rotating coil generator, the magnetic field between the poles of an electromagnet has the magnitude .40T. A circular coil between the poles has 120 turns and radius 4.0 cm. The coil rotates with frequency 5Hz. Find the maximum emf induced in the coil. Homework...

i have been working on generating high frequency alternating magnetic field (amf) generator (100-500 khz range) to magnetize magnetic nanoparticles contained in a plastic test-tube wound with copper wires around which amf has to be generated. what is the best option to choose for such an...

I'm probably going to make a fool of myself for asking this, but that's what the anonymity of the internet is for right? (That and other things that you probably won't find at a physics forum) If I understand correctly, and I may well not, the reason you cannot build a device that will...

hi, everyone know that when electrical load is applied to a generator, the generator slows down. Now my question is what actually slows the generator, what kind of force and how much is that force this question my sound weired to many but i need a very definate answer. thanks in advance

Homework Statement Let <a> be a cyclic group, where ord(a) = n. Then a^r generates <a> iff r and n are relatively prime. The Attempt at a Solution OK, let n and r be relatively prime. Then ord(a^r) = n. We need to show that for some j, there exists an integer k such that (a^r)^k = a^j...

Homework Statement A generator with an rms voltage of 130V is connected in series to a resistor 3.65k\Omega and a capacitor 3.00\muF. Using the frequency found in part A (47.5Hz), find the average power consumed by this circuit. \phi = 17degrees Homework Equations Latex isn't...

So I was wondering if I could get some help and advice on a project I am working on. I have next to no experience or knowledge of electrical circuits so I appreciate your patience. I am trying to power a structural health monitoring system "accelerometer" unit on a bridge using...

Hey guys, I want to build a DC Permanent Magnetic Generator that will generate electricity which I want to pass through a Bridge Rectifier to produce DC electricity which I'll store in batteries or I want to pass it through a power inverter for domestic use. Is this possible? I was...

Hey I'm interested in designing a linear electricity generator (think magnetic piston moving back and forth in a coil housing) and was wondering if anyone could reference where I should look for designing the coils/magnets. Thanks!

Hi, Can someone help me in this matter: I would like to know if it is possible to use air instead of hydrogen in a hydrogen-cooled generator. If it is possible, what would be the conditions to do it. If not please justify your answer (e.g. safety reasons, efficiency, what can go...

Homework Statement A Van de Graaff generator is used to demonstrate the effects of high potential. The device has a radius of 86.0 cm and stands in air. What is its maximum potential? (Note: An electric field of 3 × 106 Vm is sufficiently large to cause sparking in air.) How much charge...

I am not an electrical engineer and my understanding of electric circuits is very limited but I was needing to power a 4.5 volt accelerometer by use of a thermoelectric generator. Does anyone have any suggestions on where I can pick one up?

If a cylindrical induction generator has: a diameter of 4 inches 500 turns (coils) of #30 wire 4 2in magnets of unknown magnetic field strength and motor generating 3000RPM Note that the magnets will be rotating parallel to the turns in the coil. See attachment for concept...

So I am in an intro E&M class and the topic of Van de Grraaff generators came up. The instructor said that when there is enough charge on the surface then there is corona discharge. But what would happen if the generator was in a vacuum? Then there would be no corona created. So would the amount...

So I am having this problem at work where a 150kW induction motor is being used as an induction generator. There is a capacitor bank in parallel to the induction generator which is primarily for PFC(the reactive power requirement of the generator is fed by the grid). Assume the induction...

hello! i'm planning to build such a generator, but i have some questions: 1. what dimensions and materials are needed to shield one typical geiger-muller tube from the background radiation? 2. even with the complete protection, is it possible that the counter tube will trigger without...

Hello, so another question I can't find the answer to anywhere else: at what point in a magnets travels does it reverse the current in a linear generator? I am imagining a solenoid with a cylindrical magnet N on top S on bottom and as its moving up to the top of the solenoid its 'pushing'...

So I can't seem to find out why generators aren't designed so that the coils are passing in between TWO magnets N facing in and S facing out, and then S facing in N facing out etc. The flux density between two magnets is obviously greater and the flux lines are 'straighter' (more lines of flux...

Hey folks, I'm reading a paper by T.F. Jordan which was referenced in chapter 3 of Ballentine. He's introducing the Galilei group commutation relations, and I'm having trouble with one of them in particular. He states that in the Heisenberg picture, time dependent position operators can be...

I am working my way through Ballentine's Quantum Mechanics and I am stuck on the following problem. Homework Statement Problem 3.1 from Ballentine: Quantum Mechanics Space is invariant under the scale transformation x\to x'=e^cx where c is a parameter. The corresponding unitary...

I can't understand why Induction Generator when diving stand-alone load must be provided with capacitance bank. In fact I am not sure as how induction generator works at all. Here is my attempt. When the rotor rotates, then due to residual flux initially some voltage will induce in the...

What are the factors that influence a generators output (efficiency?). Does the rotational speed of the magnets influence output? If so, by what magnitude can this be increased? ie. If a system is running at x rpm by what relation can the output be increased if the rotational speed is through...

Homework Statement An AC generator in an LRC circuit produces a voltage V(t) = 1.414sin(wt) = 1.414sin(1000t) The values of inductance, capacitance, and resistance are shown in the diagram. Recall the w = 2pi*f. i made a picture of the diagram...

When the rotor is turned, it is common to measure the voltage by multimeter. However, there is a problem that I cannot fully understand. When I directly measure the voltage by connecting the two terminals of generator, it is found that the measurement is not same as the voltage across a...

Renewable Energy (RE) Sources are a hot topic, but careful study of the solutions thus far offered make realizing RE as more than a tiny percentage of demand unrealistic. I have been thinking on an idea for a very large scale wind generator that I think is a potential solution for many of the...

Is there an Optimal RPM for a DC generator?? I would like to ask if there is an optimal rpm for a DC generators? Or the faster it rotates, the more power it generates? The specification of the motor is as follow: http://www.mitsumi.co.jp/latest/Catalog/pdf/motorav_m25e_11.pdf

Hi I have this idea I was thinking of: may not be great but seems to be good. The idea is to have a 15 amp motor connected to a alternator via a pulley/belt system. Having that motor connected to a inverter, so when you turn on the inverter it would turn on the power to the motor causing the...

Homework Statement A bar magnet inserted into a coil of 500 turns produces an induced potential of 1.5 Volts, Determine the potential difference induced when each of the following changes are made a) a 250 turn coil is used b) the bar magent is moved twice as fast c) Three identical...

Hi, I am doing a project and part of it is to simulate a self excitation of the induction generator. I know that it needs capacitors in order to receive reactive power. So I added a load block with capacitive power only. And there is no current nor voltage in the circuit. Why? What am I doing...

Homework Statement An AC generator, originally designed to provide a peak output of +/- 155V at frequency 60Hz, is required to provide a peak output of +/- 340V at 50Hz. If the generator is connected to a transformer with 200 loops in its primary coil, how many loops should there be in the...

Homework Statement "A motor having an efficiencyof 88% operates a crane having an efficiency of 42%. With what constant speed doess the crane lift a 410-kg crate of machine parts if the power supplied to the motor is 5.5kW" e'=42% e=88% m=410 kg dr=? de=? t=? g=9.8m/s square...

I have a question about a magnets position over a coil of wire in an A.C generator. Is the voltage in the coil at Peak as long as its covered by the magnet? and then the voltage starts to decrease to 0 volts as the magnet starts uncovering the coil until the magnet totally uncovers the coil and...

Generator output question... Hi there, If I were to drive an electric generator from, for example, a 200Kw petrol engine, would the output of the generator also be 200Kw, or would I loose some power along the way? And if so, why? Many thanks.

Hi, I'm trying to work on this interesting little project that involves charging a 6V battery using a simple DC generator powered by a wheel spun manually. The equations for the DC generator output would be : E = N B v sin(theta) x 10-8 if I'm correct. E being the voltage, N=number of...

I'm relatively new here, but I felt that you guys might be able to help me. I'm trying to design a directed electromagnetic field generator with a variable field strength and oscillation rate. What I'd really like to know is exactly how difficult would this be? My EE experience is rather...

Low Cost "Harmonics Generator" Hi, Thanks in advance. I noticed how good is this forum so I decided to share my thoughts with you about the following. If possible, I need some ideas from you guys to build a low cost circuit to generate only 2nd an 3rd harmonics for a 120v 60hz sinewave input...

My textbook derives the relationship [J_x, J_y] = 2pi*iJ_z by considering the J's as the generators of the Euclidean rotation operator. Why does this result hold when J is the generator of other rotations, such as rotations in a quantum mechanical spin-state space?

There is known effect when electric field bends water stream: http://www.school-for-champions.com/science/static_induction.htm" Does that mean that moving water inversely affect electric field?If yes,could we make electric generator in which moving water would affect electric field and...

Hello everyone, I need help designing a Faraday Generator suit. It's basically a bunch of small Faraday generators (the kind used in flashlights), sewn into the fabric of outer clothing and connecting to batteries to charge them. The problem is that I have no idea what it will take to make...

Homework Statement http://www.screencast.com/users/trinhn812/folders/Jing/media/cdd8b2f4-1c0d-43ba-8722-fb8b811c5585 Homework Equations V=IR V(C)=X(C)*R The Attempt at a Solution I'm having trouble with number two. I tried finding Z from the frequency and then calculating the...

Is there a different formula for generator and motor effects? What are they?

This is my first post, so a little background on me: I am a senior in EE at UofL, I am currently working for a company who has given me a larger project to complete (They kept me on part time while I finish school). I have not taken any analog or digital design classes, so I fear I am in over...

Hi, I’m really stuck on a problem for my final year project in my taught Masters degree and any suggestions what might be going wrong would be greatly appreciated. I’m trying to run a three phase delta connected induction generator on a single phase supply using a Steinmetz connection. The...

theoretically I believe this is possible: basically I am trying to decide if I could use an electric motor as a generator to charge a battery source, and when needed use it as a motor as well. I think the only issue is the rpm's which it is operating at, to get the most...

Homework Statement X=(aX + b) mod 65536 Output is 1,4,9, ? Can anyone give me a hint as to what a and b are Homework Equations The Attempt at a Solution 1=(aX + b) mod 65536 4=(a1 + b) mod 65536 9=(a4 + b) mod 65536 The values I have tried get me from 4 to 7 not 9

Is it possible to power an entire house by an HHO generator?

Linear congruential generator x_n (equivalence) k x_{n-1} (mod 100)where k is some fixed positive integer. Is this a good random number generator (that generates from 0 to 99). for which k is this particularly bad and are are there any k for which this is better than other k? How...

Hi, can anyone tell me how to measure the parasitic capacitance in a generator?