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

4
votes
1answer
141 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
55 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
45 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
72 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
101 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
83 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
74 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
54 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
45 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
65 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
126 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
79 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
140 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
36 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
102 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
158 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
200 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
74 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
91 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
84 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
40 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
190 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
93 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
57 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
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 ...
0
votes
0answers
27 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
57 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
97 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
68 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
40 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
139 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
135 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
73 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
49 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
125 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 ...
0
votes
1answer
36 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 ...
0
votes
1answer
68 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. ...
0
votes
1answer
65 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 ...
0
votes
3answers
212 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 ...
1
vote
2answers
71 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?
0
votes
2answers
84 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 ...
0
votes
1answer
95 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 ...
0
votes
0answers
23 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 ...
0
votes
0answers
43 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 ...
0
votes
3answers
137 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. ...
1
vote
1answer
91 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 ...
-1
votes
1answer
49 views

Cumulatively excited and Differentially excited DC generator

Is a cumulatively excited DC generator long shunt or short shunt motor?
0
votes
1answer
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.
0
votes
1answer
237 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 ...