Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
petect Newbie Joined: 03/02/2018 Location: United StatesPosts: 15
Posted: 07:35pm 07 Mar 2019
Copy link to clipboard
Print this post
noneyabussiness
I wasn't able to open the link you posted. Do you think you could post a url that could paste in my browser?
Thanks Pete
noneyabussiness Guru Joined: 31/07/2017 Location: AustraliaPosts: 513
Posted: 09:53pm 07 Mar 2019
Copy link to clipboard
Print this post
AU $64.47 16%OFF | Aiyima 2000W Modified Sine Wave to Pure Sine Wave Inveter Board Driver EGS002 AC16VDC380V to AC220V Driver Module EG8010+IR2110
https://s.click.aliexpress.com/e/cMuDJzhO
Hope that worksI think it works !!
petect Newbie Joined: 03/02/2018 Location: United StatesPosts: 15
Posted: 01:19pm 08 Mar 2019
Copy link to clipboard
Print this post
noneyabussiness
Yes the link to ali worked.
THANKS Pete
petect Newbie Joined: 03/02/2018 Location: United StatesPosts: 15
Posted: 02:02pm 11 Mar 2019
Copy link to clipboard
Print this post
noneyabussiness
I've been looking at the ali device you posted and I'm having a hard time seeing how it works (see Parameters below) I might have confused things by calling the alternator that I have a "generator". Just to clarify, my gas alternator puts out 230v ac. My well pump runs on 230v ac (about 6 amps). I'm worried that the sloppy output of the alternator might damage the well pump, as it would cost about $4K to replace. I'm hoping to find something that can clean up the output of the alternator in order to protect the pump.
Hopefully that's a little clearer. Thanks Pete
Parameters
Input voltage: DC380V
Input voltage: AC16V
Output voltage: AC220V
Output frequency: 50 / 60HZ "adjustable."
Weight:500g
Size:Length:152mm Wide:92mm
Derections for use
1,The first before using need inverter Pre-amp diode into DC380-400 v
2, Drive Plate Need 12V DC power ,to power a driver board, there is no limit on the AC/DC Power Supply Voltage.AC Power Supply Shall Not Be Higher than 16V
3, Inverter with over current, over voltage, short circuit detection function.In this particular statement short-circuit protection for our inverter working condition to decide! In order to better protect our suggestion in the input with about 10A circuit breaker or fuse
4.Products such as update without notice, unless the function change!
ltopower Regular Member Joined: 08/03/2019 Location: United KingdomPosts: 64
Posted: 07:38pm 11 Mar 2019
Copy link to clipboard
Print this post
Bit late to the thread...
I thought some of the noise was just the sharp acceleration and decelleration of the engine during the combustion cycle, compression gradual slow down over 1.5 turns, engine fires and all of that acceleration over less than a quarter of a turn creates a fast distortion and associated harminics ?
Single cylinder diesel would be the worst case as all of the acceleration occurs in about 90 degrees (or less) of every 720 degrees of rotation.
I do like the idea that was suggested elsewhere to attach a high rated car alternator and remove the regulator to power it up at 48V. 120A alternator at 48V... direct into the battery.
LadyN Guru Joined: 26/01/2019 Location: United StatesPosts: 408
Posted: 08:29pm 11 Mar 2019
Copy link to clipboard
Print this post
This is fascinating insight into the inner workings of an ICE!
is there a forum board you know of where I can learn more about this?
Where was was suggestion?
My concern is that a car alternator uses an AVR to regulate the voltage. Without regulation, there is effectively nothing except the load itself to manage how the alternator pushes out the energy.
In other words, 120A alternator at 48V could turn into a 12A alternator at 480V and I cannot think of an argument why that could not happen without an AVR.
Warpspeed Guru Joined: 09/08/2007 Location: AustraliaPosts: 4406
Posted: 10:04pm 11 Mar 2019
Copy link to clipboard
Print this post
Its not only the torsional fluctuations of a single cylinder "banger" engine, but the magnetic field within an alternator can be distorted by the shape of the pole pieces and armature.
So its very unlikely that a mechanically generated waveform is going to have ultra low distortion. The larger alternators are generally much better than the small ones.
The problem with automotive alternators is that they usually need to run at around 2,000 rpm to get up to rated output voltage, and faster still to produce full rated current.
They can be run up to much higher speeds than that and will generate higher output voltages accordingly. But running a 14v alternator at 8,000+ rpm to get 48v from a small gasoline engine is not going to be very mechanically efficient.
The alternators themselves are not very efficient either. That does not matter if its bolted onto a 300Hp V8 engine. But if your little gasoline put-put only has a couple of Hp, its going to really struggle.Cheers, Tony.
noneyabussiness Guru Joined: 31/07/2017 Location: AustraliaPosts: 513
Posted: 11:05am 12 Mar 2019
Copy link to clipboard
Print this post
You will need a suitable diode bridge rectifier on the output of your gennie, which will be your " 380v dc " input ... then a simple 12-15v supply ( "wallwart ") for driver stuff... putting high voltage caps on the output of your bridge rectifier would clean up any excess " noise " from the gennie and the eg8010 board will do the rest to keep a clean as possible sine wave..its similar to how a lot of modern air cons work (except usually they "smarter"). Rectify noisey mains clean up signal and feed the compressor with a controlled sine wave, also for frequency and voltage for speed/pressure on the really smart ones..
I hope that helps, maybe someone with more brains can explain it better..Edited by noneyabussiness 2019-03-13I think it works !!
petect Newbie Joined: 03/02/2018 Location: United StatesPosts: 15
Posted: 11:35am 12 Mar 2019
Copy link to clipboard
Print this post
noneyabussiness
Thanks a lot. Now it makes sense. Maybe someone with more brains at this end would have been able to figure it out. Thanks again Pete
LadyN Guru Joined: 26/01/2019 Location: United StatesPosts: 408
Posted: 06:10pm 12 Mar 2019
Copy link to clipboard
Print this post
Pete,
I personally recommend considering building a Warpverter if a pure sinewave inverter that you can easily upgrade over time is of value to you.
Just to ensure we are all on the same page, the solution to your problem is to convert your noisy input down to DC and then invert it right back up to AC with the objective of reducing ripple and noise.
This is something the Warpverter excels at.
ltopower Regular Member Joined: 08/03/2019 Location: United KingdomPosts: 64
Posted: 01:59am 13 Mar 2019
Copy link to clipboard
Print this post
LadyN, have a look at https://en.wikipedia.org/wiki/Power_band The chart on the right showing the very sharp acceleration in section C over a few degrees of rotation. I was looking at these type of timings a while back as I was seeing if a cheap FPGA could be used to measure the timing difference of the twist on a drive shaft 1" in diameter. Surprising at how much twist can occur in such a small amount of time.
Will have to try and find who mentioned the alternator, removign regulator, option.
Alternators are indeed very poor at efficiency, but they are quite cheap (or relatively cheap at the moment) compared to the alternatives of PMG. If they are only a stop-gap provider for power the efficiency hit may be ok. The rpm does need some gearing/belt though.
For size (because of the higher rpm use) they would be a lighter generator for the capacity at the expense of efficiency (and eliminate the AC step). Just thought it was an interesting idea and an option, I may try this out. The spare 10hp diesel put-put in the shed may end up on vegetable oil with the heat into the house while charging the battery..
petect Newbie Joined: 03/02/2018 Location: United StatesPosts: 15
Posted: 01:40pm 13 Mar 2019
Copy link to clipboard
Print this post
Hi LadyN My knowledge of electronics falls pretty short of where I would be comfortable building an inverter. I will be following the build and might even learn something. Thanks Pete
LadyN Guru Joined: 26/01/2019 Location: United StatesPosts: 408
Posted: 06:26pm 13 Mar 2019
Copy link to clipboard
Print this post
Pete,
if the only thing keeping you off from building a Warpverter is your belief that you need to know electronics very well to build it, please let me know.
I want to document the Warpverter to enough detail and simplify it to a point where anyone who's smart (and anyone on this board far exceeds that criteria) can build it and get it to work the first time.
For now, I currently am absorbing the workings of the Warpverter and Tony and Andrew are helping me a LOT in ensuring I will be successful. I will continue working on this and given our efforts I have no doubt we will be successful.
This is where I would need your help: I would really value your input on my documentation : what can I do better to make it easy for you?
For example, you can check this out to get started:
petect Newbie Joined: 03/02/2018 Location: United StatesPosts: 15
Posted: 09:17pm 13 Mar 2019
Copy link to clipboard
Print this post
LadyN
In the unlikely event I see anywhere that I can help, I will. My understanding of electronics is really very limited. If you decide to make a jet engine - I could probably help with that Pete
Warpspeed Guru Joined: 09/08/2007 Location: AustraliaPosts: 4406
Posted: 09:30pm 13 Mar 2019
Copy link to clipboard
Print this post
I always wanted one of those for my bicycle.Cheers, Tony.
petect Newbie Joined: 03/02/2018 Location: United StatesPosts: 15
Posted: 11:43pm 13 Mar 2019
Copy link to clipboard
Print this post
Tony This is the last one that I worked on. It could probably be scaled down a bit.
wiseguy Guru Joined: 21/06/2018 Location: AustraliaPosts: 1156
Posted: 01:51am 14 Mar 2019
Copy link to clipboard
Print this post
Hmmm..... ~17 tonnes of thrust that should liven up your bicycle a bit..... If at first you dont succeed, I suggest you avoid sky diving.... Cheers Mike
Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
Print this post
