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Questions tagged [generator]

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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Electrical question - trouble with midget connector [on hold]

I own a bucket truck and so I got into there to install my midget connector. It's just a limited space there where I need to work. So I climbed up there, got my pigtail wires out and I used my bull ...
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32 views

Does an automotive DC generator care about battery voltage? [migrated]

Can a 6 volt positive ground generator be used in a 12 volt negative ground system? The question pertains to converting a 6 volt positive ground automobile to a 12 volt negative ground system. The ...
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42 views

Paralleling output of multiple BLDC motors used as generators

First of all, I apologize for anything stupid I say as I am not yet well versed in the proper technical terms and schematics. I wish to use several identical BLDC motors that will be spun at the same ...
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1answer
44 views

Is it possible to design a three-phase delta generator only with two generators? [on hold]

I've always seen 3 generators in a three-phase generator, but this question came to my mind. I've tried to add an element instead of the third generator, although with no result. I hope someone can ...
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31 views

Automate Manual Choke in Generators

I want to know any ideas to make an auto choke for my home generator. I have an automatic transfer switch (ATS) installed which turns on/off the generator. Most of the time, it is not necessary to ...
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30 views

Question about motor and generator size [duplicate]

For a given power, which will be larger, a motor or a generator? Is there a certain relationship between motor/generator size and power?
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45 views

Why aren't homopolar generators more commonly used?

In particular with the advent of HVDC(high voltage direct current). Using mercury(metal), the resistive losses can be greatly reduced. There has even been some experimental research into neon plasma ...
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57 views

AC Generator for maximum load [closed]

I just bought a Honda Generator Model# EG 6500CL, with the setting on 110V only, I want to deliver the maximum rated current of 45.8V to one load. There are 3 receptacles available, 2 at 20A, 1 at ...
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47 views

What happens in a generator so that we get a sinusoidal voltage as an output?

I read this online, " For a travelling magnetic field in a circle, the induced magnetic field in the armature of the generator will be sinusoidal. That's why the generated voltage is a sinusoid, ...
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46 views

To run 1.5 ton ac [closed]

i want to run a 1.5 ton ac through dynamo and generater(that run a dynamo) for that purpose how much KVA dynamo required and also a diesel generator(how many hp/KVA) will be required. NOTE:- generator ...
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1answer
53 views

Power of supplied by generator when it is loading

I have a cummins generator which is having capacity in name plate as 803 kw. While running the load test, each phase current shows 153 A, 53 A, 120 A and neutral current 27 A or something. How can i ...
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58 views

I need advice for my project

My name is Clement and I'm from Malaysia. I'm currently studying for a diploma for electrical engineering. For my program, I need to design and make a mini portable genset. I have bought all the ...
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Generator matrix of TCH3 in GMR satellite

I am interested in finding the generator matrix used for TCH3 channel encoding (GEO-Mobile Radio Interface). I followed the installation steps indicated in OsmocomGMR. There was an example for FACCH3 ...
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1answer
32 views

Synchronous Generator EMI

In the attached image below, I don't understand the text and phasor diagram that I have highlighted in yellow. Why does the induced emf on the armature winding lag the magnetic flux of the ...
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1answer
60 views

Synchronous generator induced EMF

I have started studying synchronous generators in more detail of recent and I'm finding it difficult locating helpful information regarding their operation. What is the formula that can be used to ...
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1answer
63 views

Designing a windmill [closed]

As a pet project I'd like to make a small windmill. I'm in the very beginning stages so I'm still researching components to use and have a lot of questions so I came here to start my journey. I was ...
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1answer
33 views

Is there a limit for voltage a PM generator gets to based on RPMs?

I build different small PM handcrank generators for fun, Recently I built a single phase generator and printed myself a couple transmissions. Now as far as I know 3 things affect voltage, speed of ...
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1answer
59 views

What should be switching voltage rating of relay in a 380VAC 3 phase system?

I am hooking up a system where there is 2 sources of power available. One source is the grid power, and the other is a generator. The grid provides me with 3-phase 380VAC with a neutral wire; and on ...
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10 views

Maximum battery bank capacity chargeable with a 2000W inverter generator

Using a 2000W inverter generator, what is the maximum capacity of a 12V battery bank that it is capable of replenishing if left on constant charge? In theory I assume that at 12V, a 2000W generator ...
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1answer
50 views

Safety Rule: Sum of wire lengths over two phases may not exceed X. What is this for?

Everybody knows various flavors of the rule "don't connect too long electrical lines to an outlet / generator / whatever". They sometimes come in the form of "don't chain your extension cords". As far ...
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36 views

Charging a high-voltage capacitor with a Marx generator

Marx generator produces a high voltage discharge. I wonder if I could charge a high voltage capacitor by connecting it to the outputs of a Marx generator and waiting for as many discharges as ...
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1answer
34 views

How would I limit speed of dc motor being used as a generator?

How would I limit speed of a DC motor being used as a generator? For a project where I have to make a wind turbine that will automatically limit speed of rotation once past a certain value. Thanks :)
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2answers
105 views

Question about hooking up two generators in parallel

So I read this question: Hooking two (gasoline) generators together to make 220VAC And it’s close to what I’m wanting to do but not quite. We had a power outage due to weather. I purchased a ...
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62 views

How much power do power stations in parallel supply?

In modern power systems, the power is supplied by effectively connecting multiple generators in parallel. However, not all these generators are equal, some stations supply more power than others (I ...
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95 views

i want to duplicate a signal generator output

I want to duplicate signal generator output to dual. since i want to use same signal to two different place. Is this possible without amplifying and inverting the signals. Let me share some circuit. ...
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1answer
65 views

Calculating number of coil turns for a generator

I'm building a generator for a school project. I'm planning to use N42 neodymium magnets with performance of 5100 Gauss, How do I calculate what diameter of copper wire I need to make the coils and ...
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53 views

connecting 3 one phase Generator to get three phases

I have a big welder machine that needs around 26 kW and three phases. A generator for this power is a little bit expensive and take me a while to import one. When you are in a complicated situation ...
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18 views

Hook up an automatic transfer switch with two phases only

We have a house in Haiti connected to the shore line. The shore line isn't always working so we bought a generator. I wanted to ground one of the two phases to create one neutral, one phase and a ...
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28 views

Generator RPM and Energy Relation

If a 3 phase AC generator rated 5 kW @300 RPM generates 5 kWh in one hour of continuous operation, is it possible to find how many rotations of the generator at 300 RPM will generate 10 Wh? Thanks in ...
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4answers
92 views

Generator to home wiring

I live in South Florida an as such need to have generators for hurricanes. I have 2 Generators, a small 3300 Watt Inverter and a big loud 9000 Watt generators. Edit: My plan is to use only 1 ...
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1answer
46 views

Can VFD be used with induction motor for regeneration?

I want to use VFD with induction motor to run it as induction generator (driven by external prime mover). Does VFD circuit allow reverse flow of electrical power? Thanks
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16 views

Physical significance of the 0-axis in Park transformation

What is the physical significance of the 0-axis in dq0 transformation (Park transformation)? Is it the same as 'zero sequence component' in the symmetrical component analysis. Can somebody provide ...
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1answer
62 views

Specifications of this Signal Generator [closed]

Can anyone please tell me which is the maximum voltage and current that can be provided by the signal generator HP 83650B ? I need that information and don't know where to find it
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41 views

Dc motor as torque transducer for BLDC motor

I bought a cheap BLDC motor on some Chinese website and could not find its characteristics. However, I have A28-400 24V amp flow Dc motor with its characteristics. If I'm able to build a test rig to ...
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135 views

Do electric motors have the same efficiency when operating as generators?

Its in the title. I'm just curious and it turns out that either this is such a stupid question that no one has bothered to answer it, or i'm just not good at googling today. I guess I'm thinking ...
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1answer
22 views

Can a DFIG operate in a synchronous speed?

A DFIG can operate in both sub and super synchronous modes. Can a DFIG also operate (stable) in a synchronous speed? If so, would the rotor current (as decided by IGBT switching) be DC since the rotor ...
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39 views

Reactive Power in grid side converter for Doubly fed induction generator

Does the grid side converter in a DFIG absorb/provide reactive power or is it reactive neutral? Also, what can we say about reactive power exchange in the rotor side converter?
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52 views

How to optimze a coil for needed voltage?

Faraday's law for a coil is : V = A * M * N Where: V = Peak output-voltage A = Area of the cross-section of the wire M = Rate of change of magnetic flux in the coil N = Number of turns of the ...
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36 views

What are the d and q axes for induction machine?

What are the d and q axes for an induction machine (physical meaning)? I understand them for a synchronous machine but how are they defined for an IM?
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48 views

Limiting the speed of an induction generator

A turbine (whose angular speed must not exceed \$\omega_{max}\$) is driving a 3-phase induction generator. I envisage the generator's electrical output being monitored by a circuit that reacts to ...
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1answer
65 views

Generator Frequency

How do I calculate the kW output on a generator when changing from 60Hz to 50Hz? i.e. if I have a 70kVA generator at 60Hz producing 56kW, how do I calculate what the kVA and kW's would be if I ...
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1answer
121 views

What is the purpose of perpendicular “smaller” magnets in between the main magnets in a rotor of a motor? had never seen this before. Do they help?

I am trying to build my own generator at home for fun, I saw on a video in youtube https://www.youtube.com/watch?v=YsSm65DAcCg where the guy placed smaller magnets in between the main magnets of the ...
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1answer
54 views

“3 phase” Type of winding I am not aware of, help? not wye or delta, maybe eFed up generator?

I bought a few 30 watt 3 phase motor/generators in supposedly delta configuration from a ali express. the motor did have only 3 wires coming out, plus the manual stating it, I am pretty sure this was ...
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2answers
1k views

How does a generator not stop itself?

I'm having trouble reconciling my understanding of motors and generators. Let's examine a simple DC motor at rest. Applying a voltage (\$V_{applied}\$) to the terminals generates a large current and ...
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2answers
121 views

How is “braking power” controlled with a regenerative braking set up?

As noted in the following question (How are current and voltage related to torque and speed of a brushless motor?) : Considering a 1000W motor: providing 100V/10A you'll be able to reach high ...
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1answer
34 views

Should a off-grid wind charge controller be UL certified? [closed]

I recently bought a 2kW wind generator, 48V Charge controller and a UL certified off grid wind inverter for my Home based wind project prototype. My charge controller which I am using to rectify the ...
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1answer
119 views

Working of a Doubly-Fed Induction generator (DFIG) in wind turbines

I am unable to understand how a Doubly-Fed Induction generator works (in Wind Energy conversion system)? I do not understand how the reactive power fed into the stator interacts with the rotor so as ...
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4answers
94 views

Is it possible to switch an electrical machine several times from motor to generator and vice-versa, within one revolution of its rotor?

I would like to find out how quickly and frequently a reversible electrical machine (EM) can be made to switch functions from a motor to generator and vice-versa - and what are the parameters of the ...
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75 views

What is the main difference between AC and DC generator basic working principles? [closed]

I cannot understand the main difference on AC- DC generator basic working principles. Lets consider how a loop wire works with a magnetic flux inside a DC generator briefly. Whenever the sides of the ...
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49 views

In a Generator, why when the Exciter voltage increases the Generator Voltage decreases?

I have a project where I have to build an electrical model of a generator with constant torque at 1500 RPM and simulate it in LabView. I have a manual that describes some measurements that were made ...