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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Wheel speed from Shimano dyamo hub using arduino

I'm trying to figure out a way to extrapolate wheel speed from the Dynamo hub I just purchased. I outputs 6V 3W AC, and I would like to potentially measure it using an arduino if possible, I' assuming ...
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1answer
69 views

Using a brushless DC motor for generator

Is it possible to use a brushless DC motor as a generator? If we use the brushless DC motor in the following configuration, the brushless DC motor is used in front wheel of a rover/small car, and the ...
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20 views

Power flow in powerworld

I want to simulate power flow project with Powerworld and I have some questions: How to insert Branch fuse for each bus? How to enter the MVA of each generator,because I see just the MW and Mvar for ...
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23 views

Permanent Magnet Synchronous Motor Direct & Quadrature Inductance

I've modeled the following motor (http://www.evo-electric.com/inc/files/AFM-140-Spec-Sheet-V1.1.pdf) assuming a direct & quadrature inductance of 0.2mH. However, I think I may have mistaken this ...
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52 views

Load sharing using asynchronous motors

I am involved in the design of a system composed of: multiple asynchronous motors, each equipped with separate drive, all acting in parallel on a load, via a common rack and pinion transmission. ...
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1answer
43 views

Magnet strength in dynamo design

I come from a computer background, and apologies if this question sounds elementary. While designing a dynamo, I came across a problem of how to calculate the the strength of the magnetic field, and ...
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1answer
20 views

Cumulatively excited and Differentially excited DC generator

Is a cumulatively excited DC generator long shunt or short shunt motor?
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46 views

What happens to the flow rate of water through a hydro electric generator

What happens to the flow rate of water through a hydro electric generator when the electrical load changes? This question refers to what happens in the absence of human intervention.
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1answer
65 views

using ICL8038 waveform generator IC with arduino uno

How do I use the ICL8038 waveform generator IC with arduino uno ? I have been trying to find apt resources but I find either the IC being used without the arduino uno or resources explaining how to ...
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2answers
77 views

DC shunt generators problem

One of the questions in my book goes like this... 'A shunt generator delivers 450 Amps at 230 volts...'. The resistance of the shunt field, armature and brush contacts are given. I get that the 450 ...
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0answers
85 views

Wind energy (using 220V AC motor)

I have created a mechanical section of windmill generator but I am stuck in the power section. Knowing that I used ac 220V motor, how can I convert this unknown and variable AC voltage into DC 12V?
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2answers
121 views

How to select most efficient motor for generator?

First post. Please forgive me if this is a stupid question. This post can be broken down into two questions. I am building a bicycle generator, but am new to the field of EE. I am trying to select ...
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1answer
75 views

3 Phase Motor Rectifier

I have a Turnigy Rotomax 50cc engine and I am trying to rectify it. I don't know whether it has delta or a wye winding style but I suspect that it is delta(Left Picture). This is what I have so far: ...
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1answer
83 views

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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1answer
86 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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0answers
45 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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3answers
124 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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1answer
91 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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0answers
65 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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1answer
158 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
137 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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1answer
57 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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1answer
122 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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2answers
80 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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3answers
141 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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1answer
84 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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1answer
107 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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67 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
332 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
101 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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1answer
65 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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4answers
289 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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1answer
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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161 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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1answer
99 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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1answer
69 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
141 views

Simple broadband RF generator [closed]

How to make a generator of RF signal which have multiple signal outputs ? Details: ...
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1answer
99 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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1answer
185 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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1answer
294 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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2answers
115 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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3answers
192 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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135 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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1answer
194 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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1answer
225 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: ...
3
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1answer
226 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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2answers
304 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: ...
2
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1answer
417 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 ...
2
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1answer
266 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 ...