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

learn more… | top users | synonyms

0
votes
0answers
20 views

Can a voltage regulator or stabilizer increase voltage and current simultaneously when used with a generator?

I have just built a generator with a stepper motor I found in a photocopier/printer (24VDC, 0.7A) and a transformer. Without load, the voltage is around 406 VAC. With a bulb (230 VAC, 18 W), the ...
0
votes
1answer
59 views

Taking an unstable DC voltage, and stabilizing it

I have a DC motor generator (basically the motor spins, and it powers an LED at the moment), and the output current (mAh) and voltage (V) is very unstable. The goal is for the entire circuit to run ...
0
votes
2answers
46 views

How can I supplement a portable generator during peak load.

I'm contemplating purchasing a 2000W generator, to power some of my tools. One potential issue i that I have a saw that pulls 2500 W at startup and then 1800 w to run. Seems to my that as the ...
0
votes
2answers
62 views

Homemade dynamo and alternator

I'm a curious person that knows only basic physics, and I want to craft a homemade power generator (eolic, magnetic or hydroelectric, the origin of the energy doesn't matter yet). I would like to ...
3
votes
1answer
89 views

How to make 5V 650 mA on a summer camp?

On our summer scouts camp, I need to power a tablet (it simulates the computer from The Lost, and the children must activate it every 108 minutes). It requires 4.3 - 5.3 V and about 650 mA. I need to ...
3
votes
1answer
68 views

3-phase Brushless Motor - Are Volts and Amps at (X)RPM equal/similar when used as Generator?

If I have a Brushless 3-phase motor that spins at 3000rpm when given 6.0A @ 20v (no load) will it produce 6.0A and 20v (or anywhere close) when used as a generator and spun at 3000rpm?? And i suppose ...
0
votes
1answer
25 views

Continuous charging and varying load on 48v AGM - Will an ESC work with a battery that is being charged?

So, in a lightweight IC/electric hybrid motorcycle I am using a small 4-stroke engine to turn a Brushless RC motor (the generator). Then a 3-phase rectifier bridge to supply 59.2v DC @ 12amps to a 48v ...
1
vote
3answers
63 views

Can I use a transformer to drop a DC voltage?

Can I use a transformer to drop down the voltage from a generator? Or should I just use a regulator? The generator outputs about 9.3 V and I need about 5 V, and I want to conserve power.
1
vote
2answers
32 views

charging an auto battery for a gate opener?

Commercial gate opening systems use solar recharging systems frequently. My location is inappropriate for solar but is right next to a small stream. What properties of a mini hydro generation would be ...
0
votes
3answers
153 views

Are Neo generators a Scam or not?

After reading the FAQ page of Neo generators, I became incredulous of this particular part (translated from Spanish): HOW DOES IT WORK INTERNALLY? Our optimized system collects the abundant ...
0
votes
1answer
69 views

sine, triangle and square wave generator?

I have little experience regarding wave generating circuits. I am aware that there are various circuits that are able to create signals but i would like to know if there is a circuit that can output ...
0
votes
1answer
50 views

DC motor as a generator as a torque limiter?

Is it possible to use a DC motor as a generator to regulate applied mechanical torque? A hypothetical situation: I have a DC motor acting as a generator attached to the ceiling. The motor shaft has ...
0
votes
2answers
92 views

A simple pulse generator

Basically, I want a minimalistic pulse generator. I guess I've always like the idea of Avalanche Breakdown to do this. I was trying to do this by using 2N2222's in reverse breakdown mode, link here, ...
1
vote
1answer
67 views

Building a micro generator, I need to account for the pulsing DC after my 3 phase diode bridge

I wound my own motor, and tested it to be about 300 RPM per volt, and if my noob math is right, it should be able to handle about 1600 watts with a ~40 volt supply without burning my nice but thinly ...
5
votes
1answer
162 views

Custom WAVE file results in different sound profile than created

My problem is as following: I'm trying to use my sound card to produce a custom repeating wave pattern which I will use in some laboratory test setup. My curve is based on a combination of a couple ...
0
votes
2answers
72 views

resistive braking for induction motor?

It occurred to me that since single-phase AC induction motors can act as generators, it might be possible to brake an induction motor with a resistive load. The basic idea is that when you want to ...
0
votes
1answer
51 views

Two-port network Current Characterization

I was trying to solve this two-pole exercise in which I had to found the z-parameters but I haven't find any clue in the textbook. How should I solve it?
1
vote
2answers
90 views

how to compute the average power from AC generator

I would like to monitor the power produced by an AC generator in a wind turbine. The goal is to monitor how the produced power varies with wind conditions. I connected the power resistor to AC ...
2
votes
2answers
119 views

How to find I-V characteristics of motor?

I have a motor that I'm turning with another motor. I can determine the speed of rotation with a tachometer. One motor is powered with a power supply and it is coupled with another motor. I need to ...
5
votes
2answers
145 views

How do I combine multiple A/C and D/C power sources into one electrical system? [closed]

I'm looking to design an off-grid power system for my house. I'm a complete novice at this point but I'm willing to do a lot of reading to complete the project. There is a lot I still don't yet know ...
0
votes
2answers
81 views

Differentiate between mains and a generator

This question is related to: Can I differentiate between a UPS, Generator and Main sine wave using a micro-controller? I'm only interested in the difference between mains and the generator. ...
1
vote
1answer
77 views

Is it a problem in a single-phase system, if a generator shares neutral with the grid?

I'm planning to use a generator to bridge longer power outages. Both the house and the generator are single-phase. If the main breaker is off, it will only disconnect the phase, the neutral will still ...
0
votes
2answers
139 views

How do I determine terminal characteristics of a dc motor with known torque and angular velocity?

How do I determine the terminal voltages and currents that will be produced by turning a dc motor at a known angular velocity and a known torque? I know that for a dc motor, the load torque has a ...
0
votes
1answer
70 views

Systematically, what would happen if I give a crank at the shaft of a motor?

In particular, I would like to know what would happen if I crank the shaft of the following kinds of motor: brushed DC, brushless DC (the kind used in computer fans now) and 6-coil 3-phase AC ...
2
votes
1answer
235 views

DC Motor as a Generator Voltage and Current

Is there any way to calculate the expected voltage and current, assuming I am turning it at the specified RPM value, when using a DC motor as a generator without physically testing it? In my case I ...
0
votes
2answers
147 views

Charging a battery with two sources, should I put them in series or parallel?

I would like to charge a battery using two sources (solar and a generator), should I put the two sources in series or parallel before the battery? The battery is actually 3 batteries in series. Each ...
1
vote
4answers
326 views

Brushless 3-phase motor (BLDC) in generator mode dropping current

I am making a winch that will spool out line under tension. I've had success using an old brushed motor. I short the windings, so that when I unspool the line, the motor provides braking torque and ...
0
votes
1answer
38 views

How to pick a rechargeable battery?

I need a rechargeable battery that can produce about 10 Wh per day. In a day this battery/ies should produce 281 mA for about 15 s, 265 mA for about 30 min, and about 131 mA for the rest of the day. ...
2
votes
1answer
190 views

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 ...
0
votes
3answers
176 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 ...
4
votes
2answers
220 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 ...
1
vote
1answer
78 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 ...
0
votes
2answers
97 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 ...
-8
votes
4answers
92 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 ...
0
votes
1answer
66 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 ...
3
votes
3answers
219 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 ...
1
vote
0answers
103 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 ...
0
votes
1answer
71 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 ...
0
votes
0answers
24 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 ...
0
votes
0answers
38 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 ...
0
votes
1answer
81 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 ...
2
votes
1answer
101 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 ...
0
votes
1answer
153 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 ...
0
votes
1answer
56 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 ...
0
votes
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, ...
0
votes
5answers
197 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.
0
votes
2answers
242 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 ...
0
votes
1answer
105 views

Electrical generator vs torque

I know that the electrical generators have mechanical and electrical power losses. But does electrical or magnetic phenomena in a generator produce a counter torque? Or all the electrical power losses ...
1
vote
0answers
52 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 ...
0
votes
2answers
192 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 ...