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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Design a circuit for rechargeable batteries supplied by a solar panel and generator?

I want to design a circuit for a rechargeable battery (or batteries) that can be charged by both a solar panel and a generator. I am working on the same project as described here, but my focus is on ...
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3answers
119 views

Generating electricity by moving door handle to produce 3 Watts?

I want to attach a generator to a door handle and have the output charge a battery. My system needs to provide about 3 Watts. A similar question was asked here and I referenced it to get an idea of ...
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2answers
187 views

If a large AC generator is overloaded, will it lose frequency or voltage?

If a large AC synchronous generator, like one from a hydro dam, were to receive overdemand from the grid, would it start losing frequency or losing voltage? I know they have several safeguards to ...
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1answer
69 views

Why does the volatge drop is huge once a load is connected to a generator?

At no load condition the generated voltage at transformer secondary output is 140 V ac. When a 60W resistive load is connected the voltage drops to 27 V ac. The pmg generator rating is 1 KW 415 V and ...
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2answers
86 views

Is there a significant loss in a voltage doubler circuit?

I am making a small generator just for experimentation. I need to double the voltage that the generator coils are producing. But I can't just connect them in series, because they are out of phase ...
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79 views

One motor connected to 4 generators or alternators - why would it not produce more electricity than it consumes?

OK so here is something I have been curious about. Let's say we connect a single electric motor (driven by e.g. an automobile battery) to 4 different generators (or alternators). Would it be ...
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1answer
25 views

Level-triggered mono-stable multi-vibrator running at 12+ volts.

I need a CMOS (preferably dual) level-triggered mono-stable multi-vibrator that runs at least 12V (better at 15~18VDC), perhaps in the CD4000 family. Everything I have found is edge-triggered only or ...
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3answers
166 views

What is the wrong with this simple sine wave generator circuit?

I've designed this circuit myself aiming to generate sine wave at the collector of the transistor, but I doesn't work. the current at the collector is DC. Is it a simulator error or the design is ...
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79 views

Bottle dynamo (bike generator) rectification and stabilization circuit for LED light

A friend of mine would like to convert her bottle dynamo (bike generator) to run a LED light. The light needs to stay on for maybe 90 secs when the bike is stopped, and needs to blink (using a ...
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1answer
51 views

Why Does My PMG Generator gets Locked Up?

I tired to connect a 60 W 240 V resistive load to a 1000 W generator which was running at 200 V immediately after the load was connected the voltage drops to 60 V and the generator stops spinning. By ...
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20 views

how to drive field winding with Buck_Boost?

In the picture that is shown as a Figure 1 obviously there is a resistor functioning as a load, and it's current(Io) as a feedback to the semiconductor (IGBT) in order for it to switch the mentioned ...
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23 views

buck boost and exciting synchronous generator

I have a Buck Boost converter for exciting a synchronous generator. the thing is that there is a load in the buck boost converter as shown in Figure 1 , everything is working good. what i want to do ...
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1answer
47 views

Monitoring power from 3-phase AC generator

Hello all. The above is a circuit schematic (sorry for poor hand drawing) for monitoring power from 3-phase AC generator. The main goal of the circuit is to see how the power output varies depending ...
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1answer
95 views

How can I store energy from short pulses of current?

BACKGROUND: I am an intern with a local company. We have a powerful 60 KW Engine that runs throughout the day. We have a two Machineries that are powered off the Engine directly (using clutches and ...
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1answer
53 views

Armature reaction of a synchronous generator

I quote from my book- When a synchronous generator's rotor is spun, a voltage EA is induced in the generator's stator windings. If a load is attached to the terminals ofthe generator, a ...
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1answer
32 views

how to convert synchronous generator field voltage from per unit to voltge

I've been working in PSCAD and in this time I'm struggling with synchronous generator in PSCAD. As you know synchronous generator in PSCAD, working in per unite so I have to change its amount to ...
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2answers
102 views

Induced EMF without motion?

I have a fixed wire and an electromagnet next to each other, and would like to induce continuous \$\epsilon\$ from the change of \$B\$ or \$A\$. Currently I'm focusing on changing the magnetic field, ...
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5answers
105 views

Square wave generator

Can you explain what for is resistance R101 on next schematic: I understand why we need R105 (open collector) and R102 (positive feedback). But R101? and C11? Thank you.
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2answers
105 views

How is generator output voltage kept constant?

I read that if we increase the load at the terminals of a generator, the current driven from the generator will increase which will slow down the generator. But for this to happen the generator should ...
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46 views

How much has the power density of electrical motors and generators changed in recent decades?

I would like to know how much lighter (if at all) a matched combination of an electrical motor and generator with a given power output would be today, compared to a similarly powerful combination ...
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2answers
106 views

5 volt generator

first time question, and not much of an electrical guy. so please be patient. My dad however, is an electrical engineer, who loves little goofy gadgets as most engineers do. For Christmas I want to ...
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1answer
34 views

What should my priorities be in designing a home generator?

I have a few basic electrical engineering questions. My purpose is a home wind/ hydro electric project to sell back to the grid. My questions are these: 1. Which generates greater power: running at a ...
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1answer
67 views

Practicality of a sound based electrical generator

I am wondering:- Numerous electrical generators have been designed for every type of renewable energy I can think of; we have solar panels, hydroelectric dams and wind turbines, to name a few. ...
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1answer
56 views

I am looking to isolate an inverter when power from a generator is applied- debounce relay?

I have tried to find specific info on this scenario with no luck The situation is this; Off grid power system 12v battery store runs 12v lights etc. and an inverter for things difficult to run or ...
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3answers
158 views

How do I build a one shot non-retriggerable pulse generation circuit with 2 triggers?

I'm kind of a noob when it comes to electronics (I'm mainly a computer programmer), so please bear with me. I want to construct a one shot non-retriggerable pulse generation circuit that has two ...
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2answers
67 views

Magnet in the generator?

I'd like to know if there is some magnet in the rotor or in the stator of the generator? Or neither of those (rotor & stator) need a magnet for the current to flow?
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2answers
78 views

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
89 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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0answers
22 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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0answers
39 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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3answers
124 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
81 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
42 views

Cumulatively excited and Differentially excited DC generator

Is a cumulatively excited DC generator long shunt or short shunt motor?
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50 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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207 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
152 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
147 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
496 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
143 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
182 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
109 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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49 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
138 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
197 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
114 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
321 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
154 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
62 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
127 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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3answers
116 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 ...