Generator Definition and 1000 Threads

Homework Statement An electric generator consists of n = 500 turns of wire formed into a rectangular loop with a length of 5 cm and width of 3 cm placed in a uniform magnetic field of 2.50 T. What is the maximum value of the emf produced when the loop is spun at f = 100 rpm about an axis...

When I put a current into a dc motor, there will be a turning effect. But I thought as this happens, won't there the an induced current that flows in the opposite direction? Bt Fleming's Right hand rule, the current will flow in the other direction. So I'm quite confused about this...

My dad is an electrical engineer, I am not. I am just a dumb race car driver. That said, I want to not ask him too much about all this stuff since I want to not look like a complete idiot. I feel that some of this stuff should be somewhat common knowledge, but alas, I am drawing a blank. I...

Evening to all, I'm electrician onboard AHTS vessel. Currently I've have problem with generators onboard my vessel. For your info, we have 4 generators onboard. When paralleling with generator No. 1 and 2, the generator will be hunting if the load is low. But if running only generator 1 or 2...

my husband has a van de Graaff generator and one day he decided to bring it out and show me since i had never seen one. well after about 5 minutes of it running i could not even be in the same room as it while it was running because it caused me physical pain. now i want to know why did this...

I'm trying to do the concept of a turbosteamer that the bmw is workking on but I'm facing few problems : the flow rate of water will be 9 ml/s and of pressure 6 bars . based on htri xchanger program , the best design of my shell and tube heat xchanger will be of 22 cm diameter and 6.4 mm tube...

I have recently some research about Siemens turbine, specially SGT400 model. this type of turbine can be used as a generator and also as a compressor. Both of them has a core "core engine " http://www.energy.siemens.com/hq/en/power-generation/gas-turbines/sgt-400.htm I need to know is...

I'm making a portable generator box, and I'm currently designing the baffles. The design is quite similar to this: http://media.photobucket.com/image/hush%20box/Audiomechanic/ProjectorHushBox1.png There will be an extra wall on the left and right to accommodate louvres on the exterior...

We have a single cylinder 500 cc petrol bike engine. It's maximum power output is 27bhp( max) and the max rpm of the engine is 5000 rpm. We need to tune the engine to MAP it accordingly. We are thinking to use a generator to convert the mechanical power into electrical power. I need help on...

Thank you Homework Statement cold water enters a steam generator at 20°C, is vaporized at 165°C, and exits as a superheated vapor at 350°C. The steam generator, operates at constant pressure. (a) the heat input to the generator (kJ per kg of steam product); (b) the fraction of the input...

Hello everyone, I've just begun a lesson on cyclic sets, but I am having problems determining a few concepts. One question will ask me to find the generators and the units of a cyclic set Z8. I have become confused and realized that I did not understand the difference between a generator and...

Regarding finite cyclic groups, if a group G, has generator g, then every element h \in G can be written as h = g^k for some k. But surely every element in G is a generator as for any k , (g^k)^n eventually equals all the elements of G as n in takes each integer in turn. Thanks...

So I decided to take a brake from electronics, and get back to physics of synchronous machines, or alternators if you will. A great deal of help was mr. jim hardy, trying to explain the alternator in the intuitive way. And so he succeed. I got the basics right. Now I want to tackle some more...

Hi there! I have here a CAT Standby 650 ekW 813 kVA 60 Hz 1800 rpm 480 Volts generator with CAT 3412C TA Diesel Engine. Im trying to come up with maximum apm load which can be connected to this generator. What formula should I use for that? simple one W=V*A, where A=W/V good enought? Or...

Hi, I was having some confusion understanding how the three phase generator works. As far as I know AC is connected to the stator and DC is connected to the rotor and the changing magnetic field in the stator causes the rotor to rotate. I was wondering what causes the rotor to rotate in...

I was just getting started with RF signal processing, and I was very interested in being able to make an oscilloscope and function generator work in real time with python. Essentially, I would like some means of: *Creating arbitrary waveforms defined by a numpy array (or sending out individual...

I have a 600v 3 phase generator that will not put out a stable voltage. When looking at the sine wave through a scope meter I see phase “B” and “C” are clipping at 690v, Phase A is still a sine wave but with some cross over distortion. Phase “A” peak is 840v. Any Ideas?

My problem is that I am trying to, in this case, send a 50 KHz signal through an LC circuit to a receiving coil (very short distance by the way) so that the secondary coil can power an ipod. It's more so a first attempt and an experiment because the 50 KHz isn't a very powerful signal but I am...

Hello, I am working on science fair project in which I am harvesting kinetic energy and converting it into electrical energy to charge an electrical device. However, i would appreciate another opinion on the setup of my circuit. Currently, my setup is as follows: I am using a piezoelectric...

Hey all, I was floating around and found this forum very very much helpful and informative... So i thought to post a question here which i was searching all over and didnt found any good answer.. I m searching for a generator (dynamo) that i would be using at around 100,000 RPM... Plz help...

Well another op-amp thread, while the other one is being cooked. http://pokit.org/get/a09120280ee2f6b6e3de7a99989b8bd9.jpg To speed you up, this is a triangle wave op amp generator. It generates a triangle wave at U2. In general I understand how the circuit works, but from the engineering...

Hey guys - I am doing my BEd degree. I'm going to get this out there right off the start because it will save a lot of issues. Please don't take this the wrong way, it's simply the truth as I know it. I am doing my Bachelor of Education, to be a teacher. As a teacher, based on my 'teacher...

http://pokit.org/get/f118bc654187e429ec1bb489e1eb3a38.jpg Suppose we have a sawtooth wave generator, like in the picture. I have a fairly simple question: If let's say Vcc is 15V, and let's say voltage drop across Re is 2.7V, and saturation point of Uce is 0,2 V. Provided that the period...

Homework Statement I am taking the readings of voltage/current in a small induction generator; the readings are conveyed as negative on the voltage/current sensors on my data-logger, and positive on the multimeter in both areas. When the magnet passes through the coil, and power is generated...

any help would be much appreciated i am trying to calculate the inductance and impedance of a unknown air cored inductor. over a set frequency range (1600hz - 2700hz in 100hz increments) using a series RL circuit tools scope multimeter frequence generator Amplifier 1ohm 100W metal...

I'm using a software to generatre sine waves for my op amp circuit. I know you have to use the headphone jack to output the signal, but I don't know how I would go about connecting my headphones to my circuit. The problem is I don't know how I have to cut my headphone wire for ground and etc...

I tried simulating a simple synchronous generator driving a resistive load in isolated mode (not connected to the grid/infinite bus), using Matlab Simulink, SimPowerSystems. First I used, Input mechanical power of 1 pu, and output resistive Load of 1 Pu. And Excitation Field Voltage of 4 pu...

I am trying to use Faraday’s law to calculate the number of turns a coil requires to produce a certain voltage. This is what I have so far. V = -N * change in (( tesla * area meters squared)/ seconds) becomes N = -1*(-V/ change in (( tesla x area meters squared)/second)) N=-1*(-V/((T*A)/S)...

As you can probably guess by my last few posts, I'm looking into resonance right now. I thought it would be interesting to make a device that could hit a specific resonant frequency, maybe even smash an object. Sure, people have done it, but...fun :) Anyhow, I was looking on how to make one...

Please teach me this: If one generator of a Lie algebra commutes with all other generator,then why must this generator be the generator of U(1) trasformation?(I know that generator of U(1) commutes with all other generators). By the way,compact simple Lie algebras belong to 3 families...

Hello, I am a new user here but have found links to this site in many of my Google quests so I thought this may be the place to start a more focused search for information. I am doing a project with my son, we have created some spinning discs using magnets as a power source. I am...

I've made a homopolar generator using Al disk, its giving me a output voltage of around 0.1V but shockingly der is no current ! a checked the resistance of the disk its very low as required, i checked for every other problem like : improper contact , smoothness of the disk , symmetry of the...

Hi for a project i need to connect a synchronous generator to the electrical grid, i need to use 2 curcuit breakers and . How to determine the cross section of the cables required and how to connect them to the 2 curcuit breakers.

My physics book explains a van de Graaff in this way: A small conducting sphere of radius a and carrying charge q is located inside a larger shell of radius b that carries charge Q. A conducting path is momentarily established between the two conductors, and the charge q then moves entirely to...

Fuel cells means chem engineering, right? (move to the right section if necessary) Anyway this sounds great, except that it still uses gasoline: http://www.technologyreview.com/energy/39203/

Hello, I have designed a water turbine which weighs about 5.3 Kgs and it rotates at about 150 rpm from a head of 3 mtrs. The water is guided by a single 25.4 mm dia pvc pipe. I can achieve better rpm upto 200 rpm by increasing the flow. My plan is to generate steady 12 Volts DC for rural...

Hey guys, I got this problem. I have 9 fans motors in which i need to send a range of dc signal of 0-10 volts to each one. I had decided to buy a simple signal generator that can do the trick but soon realized that having one signal generator hook up to 9 motors at the same time will not be...

Homework Statement I want to ask how dc motor and ac generator work and how they are used. dc motor is a device that converts electrical energy into mechanical energy. dc motor consists of magnet, coil, split ring commutator, brush and dc supply. dc supply will give direct current to the...

Hi, I'm a electrical engineering student and i have a question conserning synchronous machines, more precisely a sinchronous generator. Considering that's no change in load, the increase of the field current of the rotor would imply in a change in the torque angle? I need a detailed...

Please teach me this: How do we know the generator of U(1) symmetry is the operator of electric charge.Is this observation(the value defined by the operator) being the reserved observation deducing from Noether theorem(considering U(1) symmetry).And also how we know this Noether reserved...

I know the power delivered by a generator is IV and I'm ok with that. I'm just curious, why doesn't it include a term involving a magnetic potential? I mean when the generator moves a charge it does some work per unit charge (V) because it applies a force storing energy in the electric field...

Alright, so I am building a hand crank generator, and my goal is to replicate the K-tor pocket socket. http://www.k-tor.com/ The goal is to power a universal powermat with the generator. I need to produce 10watts at 120volts, and my group is completely lost. If anyone could provide...

Hi, I am in processing of sizing a generator that biomass as fuel to be fed back to the grid as part of feed in tariff initiatives. However, I would like to know roughly how this feeding mechanism works. For example, in a workshop, a machine motor would initially draw up to 5X the rated motor...

Suppose that the stator of an induction motor is connected to grid and the rotor is run faster than the synchronous speed. Now the current direction in the rotor circuit reverses because air gap flux as seen by the rotor rotates in reverse direction at slip speed. To maintain the same flux in...

Hi, i am developing a home-made generator but i am having some trouble with coil design. Going on Faraday's induction formula : V = N A (2 pi RPM/60) B a 50 turn coil with a radius of 20mm going at 20,000 RPM should give me 80 volts or so, in practice i am getting much less than...

Hi, I have a questions about generators and how they generate electricity. Why is that some generators generate large electrical power running at 3600 rpm, and yet some generate little electricity running at the same speed? And why are low rpm generators (e.g. 900 rpm or less) able to...

Hi, I hope someone can help me. Looking at the attached picture design of a magnetic generator, I would like to try and build my own. If I had to build a generator producing 60 kW at 240 rpm, how big should the magnets be, and what gauge copper wire and length should I use? If I would like...

(QUESTION:) I was Thinking of Creating a Generator System... Okay, so I've been thinking about creating a generator system that doesn't reply on a Ful powered engine and to eventually get off of the "grid' completely one day... Also, in the last 4.5 years since we've moved into this house...

Homework Statement I have a problem which I will attach a picture of, regarding a system composing of a heat recovery steam generator and a turbine. I have to work out the power output of the turbine, which I think I will be fine with. What I would like to know is, how does the combustion...

If you are turning a generator by hand that is directly wired to a electrical motor will it transfer the electrical energy produced by the generator to a electric motor more or less efficiently then with a pure mechanical system? assuming that the input energy is located away from the output...