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

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Derating of a Generator?

What is actually meant by derating of a generator and what are the factors to be taken into considerations for derating a generator. Also what are the methods involved in derating a generator and what ...
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71 views

Exact (accurate) and cheapest Second Signal Generator circuit

Sorry, this is my first question. I want to create a watch (clock) with needles, but I want to create a circuit to generate the second signal (not labview, not software). I need to know the IC's ...
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37 views

How do I determine what size generator I need?

What are the number of factors and considerations to be taken into account before sizing a prime rated generator? I am having a situation where I would be having 3 motors of 10 kW each and all these ...
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111 views

Could a significant amount of electricity be generated from public hand-operated generators?

So imagine you're at a bus stop at a train station. You're bored and have got nothing to do. So you see a big crank-handle sitting there doing nothing, and because you're bored, you decide to spin it ...
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40 views

DC motor spun clockwise then counter clockwise creates AC current?

I am making a generator with a DC motor but the style of turning the rotor would be clockwise and then counter-clockwise, and I would want to capture as much current as possible so I hope it could be ...
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54 views

How do I find power flow and shaft torque of induction motor?

A 50Hz induction motor has a synchronous speed of 3000 RPM. The motor has 2 poles and is initially running below the synchronous speed. An external force is applied and the motor is now rotated at ...
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83 views

Switch mode power supply connected to the diesel generator makes bad voltage oscillation

GEKO diesel generator has 60 kVA electric power. Our switch mode power supply connected to this generator via passive filter DL-50EA3 and 6-pulse bridge rectifier (see the schematic). In this ...
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2answers
129 views

LED Bike light - blowing at high speeds? [closed]

My bicycle is equipped with a about 5 year old hub dynamo and a LED front- and backlight. I suspect the dynamo is a DC-generator though this likely may be false. But if its true, it would mean that ...
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51 views

simulating a lightning generator

I didn't have much input with the original post, so I'm taking a different approach now. How do I model a transient/lightning source whose output looks like the shown waveform when connected to the ...
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120 views

Temporary, high-power energy storage

I'm currently building a small, portable human-powered charger for supplying a 1W led. I salvaged a dynamo core from a torch, but I'm unable to use other components inside since the torch is only ...
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66 views

Raising Alternator Voltage

Does anyone have a good idea on how I could raise the voltage from a 12v car alternator to 48v dc for use in a 48v wind system? Could I put a dc negative voltage of 36v into the regulator field ...
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73 views

Single phase from 3 phase generator

I got a good deal on a 3-phase generator, but everything I have is single phase. There's a sticker on it that says 230v 60hz. The output is a 4-wire plug. I did some testing with my multimeter and it ...
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63 views

How to correctly edit a system to increase per-unit voltage of a bus [PowerWorld Simulator]

I have created and simulated the following energy system using PowerWorld Simulator 17 (please download the picture if it's not clear). Now, I was given the requirement that every bus should have ...
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99 views

Help building electric generator? [closed]

I am in the process of building an electric generator for the first time, and I have found out most of what I need to do, except the following things. Can I have 2 rows of magnets linked together ...
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46 views

Generator speed, and power output. Frequency

When you have a sudden change in load, I understand that you can expect to see sudden, voltage/current spikes. I also understand that you can expect to see a generator speed up or slow down for a ...
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1answer
126 views

Parallel generators don't divide reactive KVAR load equally

We have three generators cat 3412 800kW at our power station. They load in synchronization. But we have a problem in the sharing of the reactive power KVAR. The voltage regulator used in the system ...
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2answers
95 views

Using a motor as a generator: How fast does it need to rotate?

I have a dc motor with the following specifications: ...
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1answer
55 views

Advantages of DDS over arbitray function generator

DDS and arbitrary function generator are digital function generator, and both of them are generate sample from memory, so how to differentiate DDS and arbitrary function generator in term of the ...
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60 views

How to identify the type of function generator

As the model of the function generator TEKTRONIX AFG 3022B didn't mention what type is it? DDS function generator, or analog function generator or digital function generator? so how to identify it?
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223 views

Importance of keeping the electricity network frequency stable

The frequency in the electricity network is kept in balance by primary and secondary control among others (see e. g. here). I read that frequencies below 47.5 Hertz are dangerous and can lead to ...
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72 views

What does 'Braked Voltage' mean on a charge controller?

Here is the complete specs of the controller. Battery rated voltage: 12v Wind turbine rated power: 300w Wind turbine braked voltage: 15v Recover voltage: 13.5v Quiescent dissipation: <8ma ...
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99 views

Meaning of “with respect to rotor and stator”

In the following example, when it says “with respect to stator” and “with respect to rotor”, did they mean the rotor part of the synchronous generator in both cases? Example: The excitation field in ...
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69 views

Windmill generator voltage-regulation with clamping diode

I am making a windmill powered generator. The charge controller I have is rated for a maximum input of 15V. I want to protect the controller in the event of high voltage spikes produced in a wind ...
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59 views

power cable connection inside ATS [closed]

it is known that ATS is used to switch power between generator and utility. but what will happen if we interchange the connection of power cable in the wrong way.(on ATS contact for utility and ...
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4answers
128 views

Simple broadband RF generator [closed]

How to make a generator of RF signal which have multiple signal outputs ? Details: ...
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81 views

Home Built Hybrid EV Battery Charge current limiting

I have a hybrid EV that I'm working on which uses 2 48V DC motors with a maximum load of 300 Amps each, for a total maximum load of 600A. I have 2 alternators running off a gas engine generating 125 ...
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139 views

What makes automotive alternators so inneficient relative to other applications?

Automotive and some marine alternators typically have an efficiency curve with a peak of 60%. Image from http://www.intechopen.com Whereas alternators to other types of applications reach 96% of ...
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222 views

Dc motor as a generator-Characteristics

I am using a DC motor as a generator for my small toy/experiment. The problem is that the motor/generator can not provide enough counter EMF or torque or whatever the correct word is. So the rotor on ...
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103 views

Is it possible to use coolers/fans as wind powered generators?

Is there a way to make a fan/cooler generate electricity by rotating its blades using the forces of nature? I just tried rotating different coolers and fans I have at home with a 2 volt pocket ...
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179 views

How does one estimate the electrical power of a power plant?

I've asked several people how a power plant creates power (i.e. currents and voltages) and I found that they were unsure. In addition, I’ve done several searches to get more information, and I was not ...
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129 views

Load on a generator

I am really stuck on this and I couldn't find any references on the internet regarding this. When a load is connected to a generator, why does the current withdrawn from the generator increases. Since ...
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130 views

Creating power from shaft rotation

I am a mechanical engineer and am working on a project. This project consists of a rotating shaft and I would like to generate power from that rotating shaft.The shaft will not be rotating ...
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170 views

One shot pulse generator (5ns)

I tried looking and I found that DS1040 capable to generate one shot 5ns but the component already obsoleted. Is that any replacement part for DS1040 or any others IC with same features? Datasheet: ...
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1answer
176 views

How should I make a generator-powered rectifier/regulator charge a battery?

In my bicycle, I have a hub generator which provides alternated current, at nominal 6V / 3W. I have built a regulator/filter/rectifier, using a rectifier bridge, a 6800 uF electrolytic capacitor, and ...
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278 views

Is electricity wasted when energy generated by power plant is not in immediate demand?

After my second series physics course I have begin to wonder how power plants control energy production to match the usage of a city. There are several possible answers in my mind listed below: ...
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365 views

Improving an existing half wave rectifier circuit on generator

Background: Just upgraded my old Generac portable generator by replacing the rectifier which had gone bad. Here is the schematic. The old style rectifier that this unit used is no longer made or ...
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1answer
230 views

Clock generator with two inverters - how does it work?

I recently assembled a little electronics toy that flashes 10 LEDs one after the other. Unfortunately I do not understand why this circuit is able to provide a clock signal- it looks to me like the ...
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7answers
180 views

What's the name of this component?

What's the name of the thing that creates electricity if you add hot things to one side and cool to the other?
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109 views

Simple Gas Generator question

I'm a bit new to this stuff so please excuse my elementary question. A gas generator rated at 700 watts and 120V puts out about 5.8 amps. Is it possible to step down the voltage to 12V with a power ...
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211 views

Why would I get electrocuted if I touched a non-isolated power line with my feet on the ground?

AC is being produced at a power plant using, let's say, a giant dynamo. A coil is being rotated rapidly through a magnetic field thus generating AC current. This current is then regulated, transformed ...
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345 views

How to generate 30Hz sine wave?

I'm building a voice ring modulator. Part of it involves a 30Hz carrier sine wave to modulate the voice with. Since I'm trying to build a portable device it will be DC powered, and since a function ...
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1answer
85 views

Where are the losses in an inverter-type portable generator?

I have an inverter-type portable gasoline generator that is rated at 3kW / 3.3kW surge. In the service manual, the engine's power output is said to be 4kW. (The engine's displacement is 269cc). I am ...
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457 views

What is 'load' in percentage?

Aircraft Airbus 320 has two 110/220v 400 hz 90 kva generators, run by two engines. There is an electronic display in the aircraft that also shows the parameters of the electrical system. One of the ...
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544 views

what happens in a seperately excited DC generator when load increased

A book about electrical machines states as below ...
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144 views

I have a 220v /60Hz generator, I want modefie it into 220V/50HZ [closed]

I have a 220v /60Hz generator, I want modefie it into 220V/50HZ....Is it possible?
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The electricity grid: what keeps small power generators from being 'driven' by large ones?

This is a two part question and pertains to power generation: What prevents a larger plant (say nuclear) from turning an itsy-bitsy gas generator into an electric motor and drive current through it? ...
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What is the difference between an alternator and a generator?

What is the difference between an alternator and a generator ?
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239 views

ways to generate (small amounts of) electricity

I'm searching into ways of generating very small amounts of electricity, by small I mean enough to light a couple of leds, nothing more The main idea is to have toys that my daughters (2 and 4) can ...
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4answers
435 views

Sawtooth generator not working - transistor wont discharge my capacitor

I have been trying to build a sawtooth generator using current source which linearly charges my capacitor and a comparator which was supposed to discharge my capacitor, instead it doesn't. Here is the ...
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385 views

Solid State Switch for magnet DC Generator

I'm using a flywheel-driven permanent magnet DC generator to charge up a bank of supercapacitors, 35 farad rated to 25V. For safety I limit the max charge to 22V via a comparator and a zener ...