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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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Maximum power transfer with constant source power

I am running tests on a stepper motor used as a generator. The stepper motor is directly coupled to a motor, which I can control with an ECS. In the ESC's software, I can choose to drive the motor ...
leheim's user avatar
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-1 votes
0 answers
73 views

30MHz signal that could drive a 100W load

I'm seeking an AC source or signal generator for a RF application with the following specifications: Output bandwidth: 0-30MHz Power output: 100W (necessary for sustaining a plasma) The issue I'm ...
ludicrous's user avatar
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1 vote
1 answer
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Finding power rating of stepper motor used as generator

I have a stepper motor that I want to use as a generator for a micro wind turbine project, and I need to know how much power it can generate. The stepper motor is a 57BYGH420 for Wantai Motor, and it ...
leheim's user avatar
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1 answer
82 views

Oscilloscope Low Sampling at uHz Sinus Signal

I tried to measure a sinus signal at 1000 µHz with my R&S RTC1000 oscilloscope (bandwith 300 MHz). The function generator that I used was the EDU33212A. I set the T/div=100s and the oscilloscope ...
DarkKnight's user avatar
0 votes
1 answer
27 views

Supply voltage of BLDC motor increases during operation

I need some clarity on an issue I have been encountering with my BLDC motors.I am using 2 integrated driver BLDC motors to drive an RC truck sort of device, they run on 24v. For the most part it ...
Aman P's user avatar
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1 vote
2 answers
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function generator outputs - difference between 50 ohm and 600 ohm

I am trying to use a PCI-Quad04 board to count pulses (from a rotary encoder). In order to test out counting, I have a 1000Hz square-wave signal from a signal generator (BK Precision, 3011B) as ...
RealNovice's user avatar
1 vote
1 answer
58 views

Trouble getting current form BLDC generator

I am designing a battery charger using a BLDC motor attached to stationary bike, I was giving this project hoping to fix the current output because is delivering low amps to the charger even at ...
Ivan's user avatar
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Excitation of a brushless portable generator by a capacitor

I have a brushless portable generator whose excitation current is controlled by a capacitor. I would love to receive a detailed explanation of how to get without any electronic card - manages to ...
ניר ברוך's user avatar
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1 answer
99 views

Questions About My Perpetual Motion Idea [closed]

Before you read any of this, this is just an idea. I am not an electrician, I am not a contractor, I am not a physicist, or anything like that. I just have an idea that i think could possibly work. I ...
DylDev's user avatar
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0 answers
68 views

How can I smooth the output of a DC motor used as a generator?

I have a small DC motor acting as a generator, spinning at 500RPM. From it, I get 1V with ½V ripple, which a 1000uF electrolytic capacitor smooths nicely. I may wish to drive the motor in reverse, ...
GrahamRounce 's user avatar
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1 answer
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Creating higher voltage from DC motor

I have a DC motor (5 V, 600 rpm). I use it as a generator. It produces near 1.5 V max. This voltage may differ while using it in the application and I can't control it. I want to raise this voltage to ...
Ritage Elsayed's user avatar
1 vote
1 answer
46 views

Is voltage to frequency ratio of a permanent magnet alternator constant in different speeds?

We have a permanent magnet alternator. I want to know if we change the speed of rotation, are the output voltage and frequency increased by same proportion? Is V/f ratio constant in different RPMs?
Amir's user avatar
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1 vote
0 answers
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Calculating generator over-speed following sudden disconnection and delayed valve closure

I'm working on an exam question related to power systems and need help calculating the over-speed of a generator following a sudden disconnection from the grid. The question is: A 475 MVA, 2 pole, ...
Mark's user avatar
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0 votes
1 answer
45 views

Where does the electricity in electromagnets come from if permanent magnets from generators decrease their magnetic strength?

The question has been puzzling me for some time, I presume electrical power starts from generators, the heat produced by them(generators) cause their magnets to weaken and electromagnets have to be ...
kopon stanley's user avatar
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38 views

Why does the valve symbol have a Clase symbol,or short-circyit symbol before the earth [duplicate]

Could anyone explain to me why the valve symbol have a shortcircuit symbol or termination symbol before the earth???
Daniel Prieto López's user avatar
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2 answers
58 views

How does a hydroturbine induction generator control its own frequency/water flow if it is already excited/pre-determined by the grid?

I was reading this article How do you connect hydro to the grid? and the author states there are two methods. One by a fixed-speed induction generator and another by a grid-tied inverter. I understand ...
t-osu's user avatar
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3 answers
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Using a 6 V DC motor for a 3.3 V LED

We are tasked to do a generator with LED for our project. We were given this video as a guide. I am planning to buy a 6 V DC motor to power a 3.3 V LED. Is that okay? Although I have read somewhere ...
Marc's user avatar
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1 vote
0 answers
68 views

Permanent magnet alternator: what happens when windings get shorted together for voltage regulation?

Here is a typical scheme for a permanent magnet 3 phase alternator as found on many motorcycles and recreational vehicles, with rectification to DC via a diode bridge and subsequent voltage regulation ...
Bliss's user avatar
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2 votes
0 answers
42 views

4am Shut down of hydro system that uses motor as a generator

My micro hydro system "motor as generator" stops generating on random days, but always at 4 am. It seems the resonance between the capacitors and generator winding is lost and the generator ...
Gary St Onge's user avatar
2 votes
1 answer
74 views

Three-phase motor as generator: intermittent loss of field

I have a 7.5 hp, 3-phase motor I am using as a generator on a grid-tied micro hydro system. The system works well most of the time and generates roughly 4400 W or about 100 kWh a day. The connection ...
Gary St Onge's user avatar
5 votes
2 answers
892 views

Does speeding up a diesel generator result in a better load response?

If I speed up my prime mover (500 kW CAT diesel generator) from 60 to 61 and 62 Hz 1800/1830/1860 rpm and hit it with 25/50/75/100 percent load steps, how much, if any kW/HP is gained? I am simply ...
Randy's user avatar
  • 53
2 votes
2 answers
128 views

How to extend up-time after power supply is gone

I just started to work on a small home project. I have an indoor bike that I use quite a lot. The resistance of the bike can be adjusted manually in a purely mechanical way (by tightening a screw). ...
Marcell Juhász's user avatar
0 votes
3 answers
251 views

XR2206 Signal Generator breaks up and distorts badly all waveforms

I just put together this signal generator with a xr2206 DIY kit, single supply, tried 9,6V smps first (too low!), then w/ checked speced minimum 12V DC Li-Ion Vcc, same behaviour, distortion/unstable. ...
rantoniusw's user avatar
3 votes
2 answers
234 views

Ratio of electrical input to mechanical input in a synchronous generator

In a synchronous generator we want to convert mechanical to electrical power but the thing that confuses me is that we also use electrical input as dc current which goes through rotor windings to make ...
amin mokarami's user avatar
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0 answers
40 views

Regulator Circuit 30-300v for 3-phase generator

I need help with the rest of the circuit to control the field in the generator (it is a 400v 3-phase 50Hz generator). I have looked around online and only find car generators 12v and 24v. What I'm ...
Silvally's user avatar
2 votes
3 answers
413 views

What happens when you get a fault to earth without an MEN link on a 3 phase generator? [closed]

For context, an isolated type single phase generator (no earth stake or neutral-earth link) had a residual current device connected to it and then a fault between active and earth was placed on the ...
SS1's user avatar
  • 89
0 votes
2 answers
117 views

Charging LiPo Battery with Solar Panel and Water Turbine Generator

I'm looking for a way to be able to connect a Solar Panel (5.5 V / 540 mA) and a Water turbine generator (3.3 V / 120 mA) together to charge a LiPo Battery of 4,000 mAh. While using the solar panel ...
Christopher Khawand's user avatar
0 votes
2 answers
101 views

How can I feed the output of a universal motor (as generator) back into its field coils?

I've been playing around with a universal motor to see if I can get it to generate power - with the aim in mind of trying to connect it to a wind turbine in the future. I have had some success at ...
Bren's user avatar
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0 answers
78 views

What motor will work best as a generator for low torque input?

I would like to know what kind of motor will work best as a generator. The input will be RPM with low torque around 20-40 N*mm (this is the minimum.) It should be possible to rotate the motor at this ...
Pedro's user avatar
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3 votes
1 answer
53 views

Wind Turbine Generator [closed]

Can an unstable and low current supply from a 7V wind turbine dc generator motor charge a 24V lithium-ion battery? If yes, how will it be done?
Prince Kwame Owusu Ansah POKA 's user avatar
0 votes
0 answers
25 views

Is it required to have both ATS/ACTS and AMF in electrical system?

I just read an electrical system layout and specification, where the designer put an ACTS on the distribution panel (to switch between the main and generator), and AMF on the generator. What I read ...
lmkencana's user avatar
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0 answers
21 views

Is the per-unit internal voltage equal to the ratio of field current to no-load field current?

An example problem provides the following information to solve for the field current. The problem is below. A large 60 Hz synchronous generator can be considered to be round rotor, that is, xd = xq = ...
AlienChicken's user avatar
1 vote
1 answer
150 views

Generator control over active and reactive power

My background is in electrical installations. I have been put on a project that is assessing generators. I would like to tap into the experience of those on this forum. I am asking these questions ...
SS1's user avatar
  • 89
0 votes
3 answers
74 views

Water turbine generator

I have a 5.5 hp 3-phase induction motor, 440 V, 60 Hz, 1760 rpm attached to water turbine wheel that I would like to utilize as line source for home power generation. May I know the additional circuit ...
Fermin C. Rivas's user avatar
-1 votes
2 answers
67 views

Can a generator with rated ouput 2.5kW handle 2 PCs rated 600W and 500W connected to two UPS rated 3000VA/1500W and 2000VA/1200W [closed]

I'm having issues with different answers from ChatGPT and Bard. I'm not an expert so I would appreciate an expert opinion. I have a PC rated 600W connected to a UPS rated 2000VA/1200W with a power ...
Sky Tech's user avatar
2 votes
2 answers
361 views

Measuring electric generator AC frequency

I need to measure the AC frequency of a 230 V electric generator (gasoline powered). I have a cheap but ok multimeter that does Hz but the reading is erratic (some 1 kHz...) The reading on the mains ...
brunobhr's user avatar
  • 133
4 votes
2 answers
133 views

Why is the shunt field of a DC starter-generator disconnected when used as a starter?

The Lycoming T53 turboshaft engine is started using a starter generator. The starter generator is a shunt generator. When the T53 is started, the starter generator is used as a DC motor to get the ...
theredlabcoat's user avatar
0 votes
1 answer
107 views

Brushless DC Motor -> Generator Power

I would like to know the approximate Voltage I could produce if I used this motor as a generator... If anyone could help me out with this I would greatly appreciate it!
RyanW's user avatar
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1 vote
1 answer
135 views

Is it ok to short two phases of a wind turbine together through a transformer?

I have a wind turbine that I intend to measure the speed of by measuring the frequency between two of the phases and then relate the value to the speed of the generator. The frequency meter couldn't ...
Shamooooot's user avatar
0 votes
0 answers
66 views

Bicycle Generator Help

I've been finding myself bicycling inside more and more as I'm getting into the whole Zone 2 workouts where I need to be at a steady state as much as possible and that's hard to do biking outdoors. I ...
William Deng's user avatar
1 vote
1 answer
269 views

TN-S Earthing parallel return paths when multiple MEN links

I have a bit-of a unique situation. I have a generator which is running a TN-S earthing system. It is powering demountable offices. I assume that all sub circuits would have RCDs in the demountable, ...
SS1's user avatar
  • 89
1 vote
4 answers
165 views

Generators given in kVA but loads given in kW

If I have a generator at 13kVA 0.8 PF. It is capable of producing ~10.4kW. I have a load of 10 kW but at a 0.7 PF and therefore consuming ~14.3 kVA. What is the relationship here? I thought this was ...
SS1's user avatar
  • 89
0 votes
1 answer
168 views

Stator wiring in Robin RGD351 not matching manual

I am currently trying to figure out why a Robin RGD351 single phase, self exciting has stopped producing power. I have gotten the manual (https://www.manualslib.com/manual/988411/Robin-Rgd351.html) ...
Yanick Salzmann's user avatar
0 votes
1 answer
156 views

How to calculate the power of a DC shunt generator?

How much power a DC shunt generator can generate if it was coupled with this induction motor: Induction motor: 3-phase / 400v / 50Hz / 600w / 1250RPM DC generator: Excitation voltage: 0-220VDC ...
Shamooooot's user avatar
0 votes
0 answers
69 views

VFD runs has backup generator, breaks down twice

I am Electroman, but very ignorant in electrical knowledge. I have a problem. We have an irrigation pump connected to a VFD that runs on the electrical grid but is connected to an emergency backup ...
electronman's user avatar
0 votes
0 answers
43 views

What circuit allows me to drive positive kV level pulses to antennas and over spark gaps to earth ground?

Ideally I would like 0-6kV pulses with adjustable frequency, but I could settle for 4kV and 40kHz. Pulses should be sharp as possible. Someone suggested a PWM module with a mosfet inside and to drive ...
wellumies's user avatar
0 votes
1 answer
418 views

How to calculate the values and ratings of wound Induction Motor Rotor Resistance Starter resistors?

How to calculate the values and ratings for the Rotor Resistance Starter resistors? Motor specs: 3 Phase 400V 1/2Hp 4 Pole 1750rpm Y connection
Shamooooot's user avatar
0 votes
3 answers
397 views

Troubleshooting a homemade Van de Graaff generator

So, I'm trying to build a Van de Graaff generator from household items, but after a lot of tries, I'm still unable to get it working and was hoping someone here could help. The problem is that no ...
Lovro Petan's user avatar
1 vote
0 answers
109 views

4W Electrical DC power from propane

I'm looking for a way to generate around 4W of electrical power (12VDC, 350mA, to be specific) with an efficiency of around 10% in a small and safe package. The background of the question is that I ...
Beat's user avatar
  • 11
0 votes
1 answer
136 views

Multiple EMF sources in a parallel circuit, semantics

Simple question, really. Need some clarity on parallel vs. series-opposing circuits. V1 is an automotive gen/alt, assume 80A max output. BAT1 is a lead-acid battery. V1 is charging the battery and ...
Bob Duncanson's user avatar

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