Generator Definition and 1000 Threads

Homework Statement A diesel engine which drives a generator has an output of 60 hp operating at a n=31%. Then generator has a n=79% and supploes a load circuit at 240 V. The diesel engine uses light fuel oil (LFO) with a calorific value of 19,600 BTU/lb. Calculate: 1. The generator...

Ive made an experimental generator built loosely of the Faraday flashlight technology. Rather than a linear air coil using a reciprocating magnet I've made a toroidal coil and added magnets on the outside of the toroidal to coerce unidirectional movement of the interior magnets that match the...

Help! I need to build an in-phase sine wave generator with quadrature output and its frequencies are between 1KHz-12 KHz and it need to be voltage controlled Thanks for any help anyone can provide.

I plan to use a automatic genset controller to protect/run a synchronous generator. This controller determines when to disconnect the starter by determining the generator frequency. I plan to connect the exitor regulator to the main breaker so when the main breaker trips the regulator is shut...

I'm looking to drive a small, 5 watt generator from compressed air (psig>60) and while being fairly frugal with the air (<.25 ft^3/min). I hope to have the base and spindle cut using a common three axis mill. Hears where I need help - I don't know how the control surfaces should be shaped or...

Hi fellow thinkers. I need constuctive criticism on the following:- Imagine a tube circling around into a closed loop - like a hoop. Inside the hoop is a ring of connected bar magnets all facing the same way. Pressurized steam is fed into the hoop - and exited in such a way as to spin the...

Candle Generator?? A Coworker showed me this video today. Is this even possible? To me it looks like he flips a switch under the table when the light goes on and off, and when the motor goes on and off. I do have a semester of general physics under my belt, but I have no idea how to explain...

Hi, got a doubt this mng, when I heard the power will be shutdown in my office tomorrow to repair a faulty circuit b/w transformer and my office. when the transformer is shutdown, and generator/ups/battery is used to keep the power supply to critical components, will the current flow into...

Van de Graaff generator? adding a electron?? Homework Statement A)If a Van de Graaff generator is charged to 5,000 volts, how much energy does it take to add and additional electron to the charge on the sphere? If the charge of an electron is -1.6 x 10 ^-19... B) How would the voltage...

I am trying to protect a generator fro loss of field with a reverse KVAR relay. My question is does a reverse KVAR relay's current transformer need to be upstream or downstream of AVR's connection to line voltage? (AVR is automatic voltage regulator) Does it matter at all.

"Generator of rotations"...rotations of WHAT? The angular momentum operator is defined as the "generator of rotations." Fine. But rotations of WHAT? What's being rotated? The wave function (doesn't make sense; isn't the wave function a scalar), perhaps? An arbitrary vector in the coordinate...

What is the difference between a reverse power relay and a reverse KVAR relay?

Homework Statement A An AC generator supplies an rms voltage of 110 V at 60.0 Hz. It is connected in series with a 0.300 H inductor, a 5.80 μF capacitor and a 236 Ω resistor. What is the impedance of the circuit? B What is the rms current through the resistor? C What is the average power...

help me out with circuit diagram of pulse generator with varying pulse width,amplitude and frequency

what are generator neutral earthing resistances. Are they necessary for small generators? (50 KW 3 phase 120/208v.)

Hi, I'm trying to build a high frequency generator. The pulse needs to have atleast 1ns rise/fall time, variable amplitude (~0-8V), 50 Ohm output impedance, and have very little jitter/be stable and I need to be able to set the pulse width and delay from ~5-1000ns. Cheers, Steve

I am trying to use an engine running at 900 RPM to power a generator that needs to run at 1800 RPM ( This will go through a pulley) My question is is half the available horsepower to the generator lost since the RPM's are doubled? In other words, do I need to double the horsepower of the...

Hey, I was wondering if someone could link me to a good source where I can read about electrical generator efficiencies and how they relate to RPM. I tried doing some derivations myself and came up with a somewhat believable result, but am not ready to trust myself as this is far outside my area...

Hello All, I am doing some random experiments where I want to generate a very fast rotating magnetic field using two out of phase sine waves (90 degrees separated). I wanted to ask you all here if you have ever seen any kits for a dual sine wave generator that allows the user to adjust the...

Homework Statement I do not understand the following statement (Please, see the attachment): "C4 has trivial subgroups and only one cyclic subgroup of 2 elements, namely <b>. This is because both a and c can be verified to be generators of C4." The Attempt at a Solution The notation...

Over the past few years I have like many of you become interested in renewable energy. Over the past few months we have gotten a lot of rain. We also have a small creek in our pasture and it begins with 2-12 inch field tiles. The end (beginning i guess) has been filling with silt over the...

Hey guys, I'm in need of some help. First... I know that the formula for a generator is V = N(turns) * A(m2) * B(tesla) * RPM 1. Is that valid for both AC and DC generators ? 2. Is the formula for a generator with only one magnet and one coil ? If so, then adding more coils changes the...

Ok, so here's my scenario/question. I am a technician that works on generators and does load bank testing on them. I'm having a debate with my boss about power factor and IF I'm wrong--I would like to understand why. Today I load banked a generator that was rated at 25kVA and could run...

Somewhere between brute force and Mersenne derivation of primes is the formula I found, \prod_{n=1}^Np_n-1=p_Z I guess it would generate more primes pZ than Mersenne in a given interval, but requires knowledge of all primes to pN, the Nth prime. It may produce only primes, rather than...

We simulated a 200MVA synchronous -salient pole- generator, using the 2D finite-element simulation program OPERA (by Vector Fields). We are trying to determine some parameters of the generator such as transient, subtransient and synchronous reactances as well as time constants by applying...

Homework Statement Im currently in my last year of high school, and I'm writing a report on AC generators. I've heard a number of different things from different sources. When the coil is perpendicular to the magnetic field, maximum magnetic flux is flowing through the coil. This is then at a...

QUESTION 10*** A generator with output voltage ε(t) = εmax cos (ωt) is connected to the primary of a transformer. A resistor is connected to the transformer secondary. The transformer has an iron core with N1 turns on the primary and N2 turns on the secondary. Assume that the transformer is...

I have made a new design i haven't seen anywhere on youtube or elsewhere. it might be a freak accident that i found hho resonance but I may have found it. I have build a generator with only 2 plates which yes I've seen that on youtube before but that's when people are just experimenting with...

Hi, I have been toying with the idea of producing electricity from the cross winds that build up in my house. Basically when I leave a window open one one side of my flat and open a window on the other the wind blows through the house very strong. I want to place a wind generator on one...

Homework Statement a) Why do pie pans fly off the Van de Graff Generator when turned on? b) When foam peanut are placed inside a pie pan with the Generator turned on, what causes the foam peanuts to fly out? c) Why does a person's hair stand up when they touch the generator...

Hi everyone, Can anyone tell me how to build simple solar energy generator for kid of age 5 – 7 year? Please tell and send me with some drawing. Thank you very much in advance Huygen

I am currently designing a water distribution system to be installed in Honduras and have run into a small problem. We plan on using a 1.5hp pump which runs at 115 v and 17 amps but the startup requires 106 amps. So to run the pump we need a 2kW diesel generator but to start we need at least a...

I read about an equation; E = mc^2 and concluded that m=\frac{E}{c^2}. Therefore, I assume that one can create Earth gravity by emitting energy equivalent to mass of earth. I also read that, simply put, that a stars gravity can be amplified when it's core collapses, or compresses creating...

Most are familiar with dynamometers that measure torque and horsepower output of the automobile drive train. The auto's drive wheels are driven onto a set of rollers and the output of the system is measured at various speeds. I am wondering if an electric power generator could be driven in this...

Homework Statement The maximum indicued emf in a generator is 205rpm is 43.0V. How fast must the rotor of the generator rotate if it's to generate a maximum inducded emf of 55.0V? Homework Equations E= NBAsinwt The Attempt at a Solution 205r/m*2 (Pi)/ 1rev81min/60s = 21.46rad/s magnet...

Hi I was hoping someone could tell me the approx. amount of radial force needed to keep a 10000W generator turning while producing maximum output if there is a 1ft pulley connected to it that does the turning. Thanks

I need help understanding a few different items regarding electromechanics, and I'm not really sure where to start. Though the figures I have provided immediately seem impractical (coil melt down, coil explosion due to excessive rpm, inside dimensions exceeding their respective outside...

Homework Statement AC voltage source rms voltage of 158. Circuit has Resistance 106 X(L) is 205 and X(C) is 110 At the instant the voltage across the generator is at its maximum value, what is the magnitude of the current in teh circuit? Homework Equations V=IR, Vmax=ImaxZ I found Z...

Hi, I have to do a homework assignment for my intro to computer porgramming class and i have to write a program that creates insult sentences. My professor gave us some code to start with and we had to fill in the functions(professor gave us the names of these functions and the name of the...

Homework Statement A series RCL circuit contains only a capacitor (C = 8.46 μF), an inductor (L = 6.01 mH), and a generator (peak voltage = 77.4 V, frequency = 2.45 x 103 Hz). When t = 0 s, the instantaneous value of the voltage is zero, and it rises to a maximum one-quarter of a period later...

i have a burning question which i need to be answered by anyone competent here... i want to know that... why large Electricity generators are installed in north to south direction? i have seen many power stations & they all have generators installed in north south why are they not mounted in a...

Hey, bit of an odd projection question here, Im working on generating a current(enough to power a few leds) in a juggling club. I was originally thinking of a "shake" generator like this <a href="http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_p020.shtml" >This</a> With...

Homework Statement Homework Equations KE=(0.5)mv^2 PE=mgh The Attempt at a Solution a.) The tanks volume is 20m^3. I then multiply that by the density to get the mass of the water, which is 20,000 kg. Apply that into PE=mgh for gravitational potention...

Take a look at this: http://www.gadgetsquick.co.uk/product_thumb.php?img=images/powerball-neon-blue-litup.jpg&w=214&h=200 I am looking for ideas about a physics project. The theme is "future household energy concepts". I found this thing from a http://www.gadgetsquick.co.uk website. How...

Hi all, Let's say i have the following: I approach a charged-up VDG holding a fluorescent lamp. The end nearest the VDG is labelled A and the end furthest away from the VDG is labelled B. My hand is holding the lamp in the middle, i.e between ends A and B. The region inside the lamp...

Hello, I'm a mechanical engineering student currently working on a project which involves a compressed air motor and a Permanent magnet DC generator. I have this generator : http://www.windstreampower.com/443905_PMDCG.php Basically, we'll use the generator power output to determine the...

hey all :) i'm completely new to the electrical game, but I'm very interested in this, however only as a hobby. I'm doing my best to learn as much about this as possible so please excuse my stupid questions. ok so I'm interested in building a generator to power my home in case of outages...

Take for instance when you ask Mathematica 7 to generate a random number. This number can't be really random. It has to adhere to some process for picking that specific number. Does anyone know anything about the algorithm/process to this?

Homework Statement Verify that (2.16) follows from (2.14). Here \Lambda is a Lorentz transformation matrix, U is a unitary operator, M is a generator of the Lorentz group. Homework Equations 2.8: \delta\omega_{\rho\sigma}=-\delta\omega_{\sigma\rho} M^{\mu\nu}=-M^{\nu\mu} 2.14...

1. A wave generator produces 28.6 pulses in 4.10 s. (a) What is its period? *solved* (b) What is its frequency? *solved* 2. period= 1/freq. v=wvlngth (freq) wvlngth= v/freq 3. i tried to find the number of pulses per second, which I think is 6.9756... idk what to do from there x.x