Alternator Definition and 132 Threads

Hi i embarked on a project to design a battery charging system using an alternator, an electric motor and a battery all connected in a closed loop. The battery powers the electric motor and in turn the electric motor powers the alternator and finally the alternator charges the battery. My...

Could it be dangerous to connect an alternator to a long transmission line,if the line has high capacitance?if dangerous then why? please explain...

Hi All, I am new to this forum and would appreciate some help from you experts! I am trying to turn a turbine (@40RPM) using an alternator via a gearbox. I have a 12v/110A alternator which i am running at 1120RPM (On its lower limits) and a 25A constant load. The voltage at this speed is...

Hello, this is my first post here! I am building a bicycle-driven generator using an alternator and battery (12v) pulled from a dead car. I can easily spin it up to the point where the alternator self energizes and produces output, but on a dead or low battery, the load on the alternator is so...

does alternator work as dynamometer?? i'm doing small engine test rig to analyze it performance characteristic. then,i connect the pulley to alternator.thing that i need to considered is power that can produced from alternator must be larger that small engine.from engine specification, it can...

Can anyone tell me how to determine the force necessary to spin an alternator at the rated RPM?

friends... one urgent help .. i need an alternator which is light in weight and the shaft should be easy to rotate because we have a small impulse turbine as power source ... when i enquired a shop out here .. he is asking me some specs... like 12v * 25 amp or 200 *1.5amps .. the speed...

Hi, I am looking at rewinding an alternator and have a few questions. I believe that the length of the wire determines the max volts and the gauge determines the max amps. Is there a formula or some test I can do to determine the length and gauge I need the wire to be. I have two...

I hope it is acceptable to ask for advice here. I am based in the UK and currently restoring a British 1964 Velocette LE motorcycle. It is fitted with electrical components made by the, now defunct, Miller Company (also British). The vehicle has a 6V 3 coil alternator with permanent magnets...

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...

Hi, I have a rather weird question to ask. I'm in need of an alternator that will give me a DC output of around 84v (maybe more) and 300 amps (more or less). To my knowledge, no such alternator exists. Not even a $3000 alternator will do it (and I'm not willing to pay that much anyway). So...

Hello everyone, I have a question that I have been unable to find an answer to. I am interested in salvaging a vehicle alternator in an attempt to create a homemade generator. I understand that household electronics' needs are measured in watts, but I can't seem to figure out how to calculate...

I'm just wondering about what benefits there are to building / using an induction coil as opposed to other devices to create devices for spark gap experiments. I am referring to the induction coils with a primary winding and secondary windings with enormous numbers of turns - similar to...

Interesed in practical maximum efficiency of linear alternators. Suppose an object with a permanent magnetic attached moves along a linear track with a constant velocity, such that its kinetic energy is 1 joule. The object "collides" with a linear alternator or generator, such that the magnet...

Is it possible/meaningful to use a 12V DC motor to run a 120 amps. Alternator at 2100 rpm ? If yes, what kind of DC Motor should be used (RPM/Watts/HorsePower)

Hi, I have few alternators(one is 3phase), and I want to test the current generated for each alternator at a same rpm. however, what is the proper way of doing this? what is the connection should be? is there a need to convert them to DC, and charge to the battery while testing? or any other...

Hi I've a wind turbine which have to run under a very low wind speed, from 2-3m/s. Currently, I'm using Envirotek V20, the result is around 1.5V-2.5V, and current is 0.3mA or nearly zero. My aim is to achieve 50W. Any suggestion for the alternator which I should use? p/s: without...

3 phase alternator. any good links to*** is what I meant in the title

What would be the size of an alternator roughly... that outputs 10megawatts? 3 phase.

Some time ago I was wondering about disconnecting my alternator from my race car just during a quarter-mile drag run. The lesser friction on the motor's drive belt system would be ideal. Then I realized that spinning the alternator itself is not that much of a problem, it spins pretty freely...

Im a mech engineering student and I am very interested in alternate fuels, and better mpg. So I was thinking and did some research on the topic I am posting about and found very little so I am looking to experienced moders for some input. what if you were to hook up a turbocharger so that the...

Homework Statement 1. A 4MVA, 13.3kV, 60Hz, 3 phase, delta-connected alternator has an effective resistance of 5.2 ohm/phase and a combined armature reactance of 54 ohm/phase. Determine the full-load generated voltage per phase, a. At unity pf, b. at 0.8 pf lagging, and at 0.866 leading pf...

Hi I need to build a 12V alternator inside a pressure casing that will be driven by a propellor. This will be mounted on the rear on an oceanographic sensor platform that will be towed behind a ship on a long cable with the ship's forward motion providing the spinning of the prop, for the...

Hello again, I'm here with a request for some advice. Hopefully I won't need as much this time as it's something I'm a bit more clued up on :rolleyes: I'm trying to work out what output voltage will occur on the stator coils of my alternator in relation to the excitation voltage in the...

Hi:rolleyes: , I want to know something about Alternator. first what is the different between Star Connection Alternator and Delta Connection Alternator, and why if we want to find the Line Voltage from Star we use this formula Line Voltage = 1.73 * phase Voltage, exactly why 1.73, where did...

Hi:smile: , How are you? I am a again. I've question about what is diffenent between Ganerator D.C and Alternator. I know the Alternater always give us A.C but we use rectifier when we want to D.C, but what is the better Generator D.C (it is one Machine) Alternator, when we want to D.C...

Could you run a car with just a battery and an alternator by having the alternator recharge the battery by using the motion of the wheels and other parts? ~Kitty

Hi guys, As per topic, what actually differentiates a generator and alternator?

Hi. I have what seems like an easy question, but I'm having trouble answering it myself. As say a standard 3-phase car alternator has a heavy load placed on it, the voltage regulator would increase the current into the windings creating a greater magnetic field and thus increasing...

hi i wish to build a battery charger using a 3/4hp240voltac motor driving a 55amp car alternator will this work has anyone done this before and will my caravan batteries be oka i have a gen set to drive the electric motor all these questions i hope to be reveled rolly

An alternator attached to a water turbine generates 35 Watts given 50 feet of head and 10 gallons per minute. Assuming that the efficiency of the alternator is 50%, is it possible for me to find the angular velocity from this information? If so, how would I do it?

I knew that if you drove a three phase induction motor attached to the line at above line frequency it would change from a motor to a generator. So one day it popped into my mind that if you put capacitors across the terminals of a three phase motor and drove it above the L-C resonant frequency...