Essentially an alternator spins a magnet (rotor) inside a coil (stator), this produces an AC voltage in the coil. A dynamo spins a coil (rotor) inside a magnet (stator), and the power is collected from the rotor via brushes, which also provide a simple rectification, producing a DC output.Thanks for clarifying. As a person with limite knowledge in the field, I appriciate the patience.
I have done a lot of research on wind turbines. They do control blade pitch to manage speed, but they generator do turn at varying rpms. It might not be noticeable by the blade speed, but the gearbox ratio makes slight differences in blade bigger differences at the motor. That is why most make AC to DC back to AC.
So my generator is an alternator without the internal control of the the rotor field. I am curious to learn more about that and how it is implemented in AC machines (like the one I have) to make them be an "alternator"
I'm not sure that there is a common term for the generators found in wind turbines. It a very specialist device, so few people outside of the industry will have heard of them. I didn't know what a DFIG was until I looked it up just now.Further reading on modern wind turbines I have found that most use DFIG. So they are using induction generator which I don't believe are alternators. Is that correct?
They are a slip-ring type alternator; the power output is AC, only the regulation feedback is via the AC-DC-AC path.Further reading on modern wind turbines I have found that most use DFIG
Electromagnetic generators fall into one of two broad categories, dynamos and alternators.
- Dynamos generate pulsing direct current through the use of a commutator.
- Alternators generate alternating current.
What are you using for the turbine? What is the cfm for each pressure value
My question was to know what device you're using to convert the linear airflow into the rotational force needed to turn the alternator.Currently unknown. Working to get a meter on it. Rough estimate is somewhere around 5,000 cfd
A small turbine expanderMy question was to know what device you're using to convert the linear airflow into the rotational force needed to turn the alternator.
The answers are all in your link, why don't you read them?.This post gets to why I was avoiding alternators.
If my motor is an alternator then why can't I deploy the feedback regulation to it?
Have you ever told us what you've got?, but you appear to be confusing 'alternators' with 'car alternators'I have read them. It seems there are conflicting opinions to that link in this thread. I am just trying to understand why. Specifically, if the link says alternators aren't appropriate (inefficient and made for to be belt driven), then how might I go about using my motor.
Yep - right here. I must be, but the suggestions in this thread were for car alternators.The prime mover is pressurized air (150 psi - 190 psi). The generator is a 240 v 60hz 10 amp motor (wanco AB20L) The load below is a test load 120v 500 watt heater.
The real load will be a bank of 12 volt batteries wired to be 24 volt. I am struggling to understand why the frequency/rpm remains the exact same even though the prime mover is increasing.
With load:
150 psi / 55 volts / 0.9 amps / 33 Hz
170 psi / 78 volts / 2.1 amps / 33 Hz
190 psi / 112 volts / 4.1 amps / 33 Hz
Without load:
150 psi / 85 volts / 37 Hz
170 psi / 168 volts / 47 Hz
190 psi / 235 volts / 59 Hz
1: There are dozens of variations in types and construction of alternators, with different capabilities and specifications.If my motor is an alternator then why can't I deploy the feedback regulation to it?
But when given advice to a way of doing what he wants he refuses because he knows better.As a person with limite knowledge in the field, I appriciate the patience.
Its an older model wanco, that currently isn't on the website. Here are some of the details, happy to provide any more you need. If you call Wanco they will provide info for the model3: You have not yet provided technical details on the motor you are using! As I mentioned earlier in the thread, the make and model you mentioned can only be found in YOUR posts.
Thank you, that helps me understand. Which is my point of being on this forum.Re. vehicle alternators - the thread you refer to is about small, low output, DIY wind turbines. The mechanical losses in running a V-Belt drive & the high speed needed would reduce output compared to some other alternator types.
You do not have that problem - you have a quite high power mechanical drive system & the relatively trivial loss from the step-up drive is far compensated by the electrical simplicity and the vehicle alternator being designed to function over a wide speed range.
The end efficiency would likely be as good as the existing motor and PSU setup; as you eliminate one electrical conversion stage.
This does not, and has gotten to the point of you trolling. I have a learned a lot from the back and forth of this thread. If you could overlook this thread and not derail it, that would be appreciated.In all of the TS's postings he never gives information on what he has, either here or on AAC. He said earlier -
But when given advice to a way of doing what he wants he refuses because he knows better.
The above still points me to him taking air pressure from somewhere that doesn't belong to him, to give him some electrical power. He's not willing to just use the power that comes from when the air pressure is high, but wants it all the time. For what time and money he is spending he could buy a small gas powered generator and had electric for the months he has wasted on his "project".
Its an older model wanco, that currently isn't on the website. Here are some of the details, happy to provide any more you need. If you call Wanco they will provide info for the model
V: 240
W: 2400
Hz: 50 (got this wrong earlier)
Phase 1
RPM 3000
Your saying I'm the troll? You are not willing to share many things, things that may get your project up and running. Things like -This does not, and has gotten to the point of you trolling. I have a learned a lot from the back and forth of this thread. If you could overlook this thread and not derail it, that would be appreciated.
Happy to share pictures. If there is something specific I can call Wanco and get that information. They are very helpful. Currently the second unit purchased will have the AB30T on it. The customer like the idea of AC due to the long line run from gernator.That still does not give any useful info on the motor type - can you post a photo of the actual motor data plate?
Is it actually a motor or a purpose made generator?
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