Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [generator]

A generator is a device that generates electricity from mechanical energy via different energy sources such as heat or kinetic energy of water.

1
vote
0answers
88 views

Why would venting an engine create a negative amperage on a generator?

I'm writing simulation software for a civilian helicopter. The helicopter has two engines and two generators. Normally, we calculate the amperage reading of a generator through Ohms. I = W / V. ...
1
vote
1answer
406 views

Methods for measuring cable path loss in RF Testing

I have been reading about various methods to perform a Cable Path Loss for RF Testing but not being a core RF person, I needed some insights on how it is done in Field or Lab. Here is my understanding ...
-1
votes
1answer
432 views

dc brushless motor specs for generator

Hello i have done my research and have found varying information relating to the speed at which you must drive a motor to get a desired output and that it is dependent upon back EMF however i am very ...
4
votes
2answers
111 views

How to use the electricity from a generator in an efficient way

I'm looking to buy a generator for producing electricity to power different things (e.g. a fridge), in a place where there's no electricity. For now, I do not have a fridge but I may have one in the ...
14
votes
4answers
7k views

Advantage of using AC generators in cars instead of DC generators

Most cars use an AC generator then convert its voltage to DC via a bridge diode rectifier to charge the 12v battery. Why wouldn't a DC dynamo be used instead? Is it because AC dynamo gives better ...
1
vote
1answer
640 views

50 Ohm Oscilloscope Input

I connected a 50 ohm function generator to an oscilloscope set to have an input impedance of 1 MOhm. I set the generator to 0.5Vpp and saw a 1Vpp signal on the oscilloscope. The generator display is ...
0
votes
2answers
93 views

Connecting a medium sized 1 kVA Inverter with a 2 kVA Generator

I have a 1 kVA inverter which is using a 12 V battery to generate 220 V AC (battery is connected to a charge controller and is being charged by a PV). In addition I've got a 2 kVA generator. ...
0
votes
1answer
668 views

Voltage regulation in alternator

A single phase, 2000 V alternator has armature resistance and reactance of 0.8 Ω and 4 Ω respectively. The voltage regulation of alternator at 100 A load at 0.8 leading power factor is _______? ...
5
votes
2answers
1k views

How does the commutator work right here?

I understand that we use the commutator as a rectifier using two segments that alternatively touch the negative and positive brush. That is when we only have one coil. What happens when we have more ...
0
votes
1answer
327 views

From the basic principle to the actual dc generator, where are the 'coil loops'?

I've studied the basic principle of the dc generator which is with the single loop example. Right here it's the example for the motor but the generator works the other way around. I'm aware of how ...
0
votes
1answer
5k views

Why are there diodes going to D+ on this alternator/generator

Below is a schematic of an alternator/generator. I understand the rectification going to B+, but I don't understand why there are 3 diodes going to D+. The way I understand the setup, D+ measures ...
0
votes
0answers
335 views

What is OCV times SCC?

Is the product of open circuit voltage and short circuit current meaningful? Does it have any significance (in a generator, for example)?
1
vote
1answer
162 views

Are electromechanical oscillators still in use? Or totally obsolete?

An electromechanical oscillator is basically an AC generator that has a much wider frequency range. I read something on a wikipedia article about a radio frequency AC generator used for military radio ...
-1
votes
3answers
846 views

DIY generator does not generate electricity

I am doing a school project and it would be great to have some help. I have built a small generator using a pringles can and enameled copper wire, but when I spin the magnet inside, the voltmeter I am ...
0
votes
2answers
2k views

How to calculate internal generator resistance?

What's the formula for calculating generators internal resistance in a circuit with a load? I am given the load resistance and the voltage sources voltage. What's next? simulate this circuit – ...
1
vote
1answer
395 views

How Armature reaction is different from Self inductance?

It was given in "Electric machinery Fundamentals" by Stephen J. Chapman book that Armature reaction and self inductance is different. Contribution from armature reaction is considered as voltage drop \...
0
votes
3answers
5k views

Power generator droop characterstics

I'm really confused in solving the following question. An isolated 50 Hz synchronous generator is rated at 15 MW which is also the maximum continuous power limit of its prime mover. It is ...
0
votes
2answers
155 views

Sychronous generator vs dc generator

I am wondering, if a sychronous generator has a smaller posibility to be burnt (be destroyed permanently) from a short circuit, that has a dc generator with parallel wound or a seperately excited dc ...
0
votes
3answers
879 views

50 Volts on the Neutral (180 Volts on the Live) bad or safe?

We have an off-grid UK home on occasion powered by a generator (MOSA GE 6000 SX/GS). Due to the design of the generator, it has two modes: centre-tapped-earth 110 V, and 230 V. When running in 230 V ...
0
votes
3answers
3k views

Synchronous Generators: Full load and No load

When referring to synchronous generators, what do they mean by "operating at no load or at full load"? Can I connect a load that is larger than full load?
1
vote
2answers
134 views

Voltmeter vu-meter dynamo

To start, I have no experience with electronics except what I've been googling the past week. What I'm having issues with is finding a way to make a voltmeter that functions like an led vu-meter would....
2
votes
1answer
384 views

Vintage DC generator [closed]

this is a DC Continental Electrical C0. Model D16 generator that came with the Fairbanks Morse hit and miss motor I restored. It was used to generate electricity for a farm house. I can not find any ...
-1
votes
2answers
492 views

Generation of power using multiple step up transformers

Why do we need huge generators to produce electricity? Is it not possible to use a small generator to produce a small voltage and then use multiple transformers to step it up?
1
vote
1answer
54 views

Increasing current draw of generator receptacles within total generator head rating

I am looking at a generator that is rated for 2600 watts, total current draw 25 amps. It is currently set up with two hot lines separately connecting to a duplex receptacle rated for 15 amps and ...
0
votes
1answer
528 views

How to Find Angle of Armature Current

Two identical three-phase, Y-connected, synchronous generators are connected in parallel to equally share a load of 900 kW at 11 kV and 0.8 pf lagging. The synchronous impedance of each generator is 0....
0
votes
1answer
332 views

240V AC to ~380V DC converter at 3500 continuous watts

I have a single phase 5KW generator connected to a diesel engine capable of producing approx 3500 Watts of power I need to convert the 240V AC to DC in order to send it to my solar charge controller ...
0
votes
1answer
398 views

Testing AC generator on a Unity power factor (Resistive Load)

When I test a generator let's say 400kVA 0.8 pf 380V 3-phase on a unity power factor should I get a 400kW and 400kVA on the controller's screen? Because as we know in 1 pf KW= KVA but in 100% load I ...
0
votes
1answer
3k views

How to control the output voltage for the different types of the dc generator?

Generally DC generators are classified according to the ways of excitation of their fields. There are three methods of excitation. Field coils excited by permanent magnets – Permanent magnet DC ...
5
votes
3answers
727 views

single-capacitor oscillator choice for digital theremin

Intro One of the pupils puzzled me with a question of building a theremin - a basic musical instrument which has a pitch manipulated by moving the hand around the vertical antenna. Due to specifics ...
-1
votes
2answers
4k views

Can I use an AC motor to generate electricity which is mounted to a bicycle by a belt or I need it to be a DC motor?

I am trying to build a generator connected to a heater (250 Watts = 0.335HP). The energy goes to the motor from a bicycle. So the question is: should I use an AC motor or a DC one?
0
votes
1answer
103 views

How do I correctly calculate the resistance (induced emf?) of a generated current against the flux? [closed]

I have all the basic physics working for every major section of the entire generator as correctly as I think I can (barring actual code implementation improvements) but just couldn't get the feedback ...
2
votes
3answers
402 views

Is more fuel consumed immediately when spinning reserve is brought on-line?

Spinning reserve is additional capacity (reserve) that generators which are on-line (spinning) are able to apply to the grid quickly in response to a failure elsewhere on the grid, or a spike in ...
1
vote
0answers
51 views

Does an HEV Genset need a controller?

I am part of a team at school that designs and builds a hybrid electric vehicle. We have chosen to use a series hybrid configuration, so we will be using a motor as a generator to charge lithium ...
6
votes
2answers
2k views

How can I generate voltage for a science project?

I am performing a science experiment where I need to generate 25 volts, 45 volts, and 65 volts. I need to attach the power source to electrodes by alligator leads into electrophoresis gel. What would ...
0
votes
2answers
96 views

AC current flow

In an AC system the voltage is generated via large scale alternators- in a DC battery 'electrical energy is stored' due to the galvanic cell and thus electron flow only occurs between the two points ...
1
vote
1answer
104 views

wind generator for electronic devices

I'm trying to run a mini project about wind generator for charging electronic devices(smartphones, mp3 player, powerbank, etc). Rough project description; I want to have several usb ports and the ...
5
votes
2answers
879 views

Designing/Predicting Output from Permanent Magnet Motorcycle Stators

I'm hoping you can help me. I've long been into motorcycles, and have restored and customized many different bikes. While building custom motorcycles, I often add electrical accessories, and use high ...
0
votes
1answer
498 views

Synchronous Generator Open Circuit Test

So as seen in the graph, the voltage was varied firstly ascending and then descending. So, is the difference in field currents between the two curves due to hysteresis in the machine ?
2
votes
1answer
2k views

triangular and square wave generator

the circuit below is a triangular and square wave generator. With the first stage (the integrator) I can generate a triangular wave, and with the second stage (comparator) I can generate a triangular ...
0
votes
1answer
616 views

position of brushes on the commutator in a dc generator

i am having a hard time understanding why do we place the brushes on the Magnetic neutral axis, the textbook simply says, because this is where the current reversal takes place, is the point where emf ...
2
votes
0answers
111 views

High Frequency Pulse Rate Generator - Science Fair

( For our High School Science Fair) I am trying to find a pulse rate generator capable of producing 2.5Hz - 20,000 Hz utilize with over 10,000 LEDs all at once with several milliseconds in between ...
0
votes
1answer
141 views

Closing the loop and creating the current in antennas

I remember Feynman explained that raid waves are emitted by accelerated charged particles. So, the only the things that antenna transmitters do is just up-down oscillation of the current simulate ...
3
votes
1answer
393 views

I'm looking for help designing a circuit that lights LEDs in response to physical output on a small electric generator

I made a little display for kids that various non-profits have been using that helps them understand how much electricity different kinds of lightbulbs use. It's very simple, using bike parts to ...
0
votes
1answer
124 views

Can I use crystal + driver(op-amp) to generate waveform

Now I need to design a high frequency generator(about 2MHz). Can I just use a 2MHz crystal + low offset current op-amp to produce a +-15V,10mA square wave signal? If not, what would be the problems ...
1
vote
2answers
122 views

Can I put graetz circuits' outputs in series and parallel?

I will have multiple coils that generate alternate current. Those coils are placed around a wheel which has some magnets on it. My current plan is to make it look like this: I was considering ...
1
vote
1answer
7k views

What is actually meant by “parallel paths” in a simplex progressive lap winding of a DC Generator?

Many of my textbooks mention "parallel path" term, but I am unable to actually understand it. Also along with this it would be quite helpful to know, how the polarity of brushes is determined?
1
vote
2answers
918 views

How to generate 4-channels phase-shifted PWM with 150kHz frequency

I'm designing a PCB on which I need to generate 4 'independent' PWM signals: All powered with the same clock Fixed frequency, any between 97kHz and 150kHz (ideally) At least 256 duty cycle steps (...
-11
votes
1answer
335 views

Magnet generator [closed]

I am wanting anyone's thoughts on if an idea I have is possible. I want to build a generator using a bearing and some neo magnets I bought. I know nothing about generators like this or in general. I ...
0
votes
1answer
94 views

how do i create this pulse using the HP 8112A [closed]

how do I generate this pulse using the HP 8112A
3
votes
2answers
837 views

Pulse Generator - I (Art of Electronics)

In the Art of Electronics book, I don't understand the following phrase .. because current is flowing down through R3, trying to pull it up. Why does this current try to pull the cap up? ...