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.
876
questions
0
votes
0
answers
33
views
Paralleling generators [closed]
I have a PREDATOR 8750 Watt Inverter Generator it does not have paralleling ports to connect another generator for increased power. Can I still accomplish this 'easily" even though I don't have ...
0
votes
1
answer
57
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 ...
0
votes
2
answers
77
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 ...
- 45
0
votes
0
answers
61
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 ...
- 1
-2
votes
0
answers
43
views
Diy variable current regulator (power work bench) using dynamo [duplicate]
This the setup I was referring to.
The right motor is the driver motor and the left is the generator. So the output of the the generator is what I want to vary especially the current. As stated, the ...
3
votes
1
answer
50
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?
0
votes
0
answers
20
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 ...
0
votes
0
answers
16
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 = ...
- 11
1
vote
1
answer
57
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 ...
- 67
0
votes
3
answers
66
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 ...
-1
votes
2
answers
59
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 ...
- 3
2
votes
2
answers
127
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 ...
- 123
3
votes
2
answers
83
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 ...
0
votes
1
answer
73
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!
- 1
1
vote
1
answer
109
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 ...
- 115
0
votes
0
answers
50
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 ...
1
vote
1
answer
70
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, ...
- 67
1
vote
4
answers
104
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 ...
- 67
0
votes
1
answer
55
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) ...
- 354
0
votes
1
answer
93
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
...
- 115
0
votes
0
answers
56
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 ...
0
votes
0
answers
40
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 ...
0
votes
1
answer
136
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
- 115
0
votes
2
answers
97
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 ...
1
vote
0
answers
101
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 ...
- 11
0
votes
1
answer
82
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 ...
0
votes
2
answers
87
views
How to generate this signal in LTspice
I would like to generate this signal on LTspice. Does anyone know?
(this pic is plotted from excel and matlab)
0
votes
1
answer
62
views
How to connect a digital meter between alternator and batteries?
We are using a 24 V, 100 A external alternator in our vehicle to charge leisure batteries. We need to monitor the alternator’s voltages and current on a digital meter but the alternator is grounded ...
- 1
0
votes
4
answers
127
views
Charging lead acid battery with DC motor
I want to charge a 12v lead acid battery with a dc motor used on the Power Core E100 rated at 24v 100w. I’m spinning the motor with a bike so the output voltage fluctuates which I assume isn’t good ...
0
votes
2
answers
64
views
Power transmitted from Arbitrary Waveform Generator
I have an arbitrary waveform generator. The arbitrary waveform has 2x CW tones of same amplitude. I'm only able to configure the overall power of this waveform, and the generator's manual says this ...
- 17
0
votes
0
answers
21
views
Why must we turn the admittance into Y matrix, then turn the Y matrix into Z matrix before we calculate the fault current?
The one-line diagram is as below,and a three-phase fault has occurred in the bus 1,now find the fault current
\begin{align}
Y=\begin{bmatrix}Y_{11}&Y_{12}\\Y_{21}&Y_{22}\end{bmatrix}=\begin{...
- 85
4
votes
4
answers
2k
views
How to connect two wildly different power sources?
I want to be able to have a kinetic generator and a mains plug both plugged into a battery, so that I can choose to pedal or rely on the mains to charge when I wish without needing to remember to ...
- 145
0
votes
2
answers
110
views
Crank an electric generator gasoline engine by using its alternator
Currently I have a gasoline generator (2 kW 230 Vac single phase), which has an electric starter. I'm searching for a potential replacement, but the brands I like doesn't have one around that power ...
- 11
0
votes
2
answers
52
views
What happens to the energy returned by capacitive loads in AC? [closed]
Power alternates equally between cycles of positive and negative. (Figure above) This means that power is being alternately absorbed from and returned to the source. If the source were a mechanical ...
- 17
1
vote
3
answers
157
views
Voltage regulator for bike generator
If one wants to build a bike generator to charge a 12V battery, a voltage regulator seems to be a smart choice. It makes sure that pedaling too quickly does not damage the battery.
But what about the ...
- 13
3
votes
2
answers
419
views
If I use a line shaft running off of a waterwheel in a creek, is AC or DC more useful? I have a generator that produces both
I am trying to get the shaft to run at 3600 rpm. I don't know if it will slow down much under a load. Would the AC be too unstable or would it be better to use a DC battery bank with an invertor?
- 31
0
votes
1
answer
82
views
Exceeding max RPM of wind turbine [closed]
I have a wind turbine that reaches its max output power at 1000 RPM, and I want to know if there's any problem if I make it go faster than that (e.g. around 1250 RPM).
I have a TESUP Yuzo. You can ...
-4
votes
3
answers
168
views
How do I know how much a kWh costs me if I have my private generator [closed]
I have a 10 kVA generator and its efficiency is approx. 90%
How can I know the cost of a kWh?
Estimate the price of diesel as $2.5 a liter.
- 13
0
votes
1
answer
60
views
Electrical motor/generator to represent variable spring damper system
I would like to build a system that represents a rotational double mass spring damper system with one set of spring and damper being represented by an electrical system. See image.
The first mass (J1) ...
- 11
1
vote
1
answer
106
views
How to find the terminal voltage of a series generator given output power and EMF?
A 12 kW, 120 V DC series generator has a series field resistance of 0.05 Ω. The generated EMF is 135 V when the generator delivers the rated load at its rated terminal voltage. The armature resistance ...
- 23
3
votes
0
answers
61
views
How to determine winding type of a generator?
I recently asked a question about a component from a wind generator (see my original question).
When looking through the answers, it occurred to me that I really didn't fully understand how the stator ...
- 161
1
vote
1
answer
146
views
DIY Double Conversion Power Conditioner
I'm trying to build an AC-DC-AC converter similar to how an online double conversion UPS works, but I have a few concerns as I have only basic electronics knowledge and no real qualifications.
I live ...
- 11
1
vote
1
answer
157
views
Superposition theorem for a Wheatstone bridge
I'm applying the superposition theorem to a Wheatstone bridge. I attached the picture. In this circuit there are two voltage generators: the first/top one is replaced by a wire. That's why there is a ...
- 27
0
votes
2
answers
101
views
Voltage generated by individual coils goes down the larger the number of coils
I'm trying to make my own alternator & study the physics behind it.
So I have a circle of magnets rotating over 4 coils, forming a square (90 degrees each).
When I remove 3 coils from the square ...
0
votes
1
answer
151
views
Generator's excitation current - why do we need to know it?
I dont undestand how seperately excited DC generators work.
If I remove the DC source doesn't that mean the generator will stop producing power?
And what is the excitation current? Won't the generator ...
2
votes
2
answers
177
views
Why do generators run in parallel when batteries don't? [closed]
The one generator sees the other as a resistance in parallel. How can they run even when they share an uneven active and/or reactive power? Why does most of the current does flow into the parallel ...
- 412
1
vote
1
answer
28
views
Angular speed and voltage-intensity
I have a square frame with 200 windings rotating in a magnetic field B=0.2T. If I increase the angular speed of rotation of the frame will only the voltage increase? will the electric current also ...
- 113
0
votes
0
answers
39
views
How to have a regulated 5v DC voltage from a 15-25v DC, 0.5A - Electric Motor Generator?
I am trying to make a hand generator to charge a phone. I have a set-up that can create 15-25v from a DC electric motor. I would like to have a regular output of 5v. I have done some research and ...
0
votes
0
answers
35
views
Generator parallel same voltage maximum phase shift?
Two gasoline generators rated 6.5kw and 9kw 240vac split phase. Voltage equalized.
Anyone could explain how the generators remain locked in synch after coupling? I believe is a sweet spot where the ...
- 157
0
votes
0
answers
146
views
DIY Van de Graaff generator
I have built a small Van de Graaff generator using items I found around the house, but I am unable to notice any charge accumulation on the dome. I was hoping you could help me troubleshoot the ...
- 109