three phase inverter #9
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It might be possible, I'm not entirely sure. I have had a go at a three phase inverter a few years ago but got stuck and ran out of steam. I can't remember what the issues I hit were, it was a long time ago. |
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I wish you would return to a 3 phase inverter project? herman |
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If you figure it out @herman75156106, I'm very willing to accept a PR. |
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Please forgive my ignorance: PR ?
I have your single phase working now at 120 volts AC 60hz
Ultimately i want to design a 3 phase 208 AC for an electric car.
My work until meeting you was long hand programming the pulses via micro
second delay.
You very effectively generate a table. Great!
The 3 phase is 120 degrees out of phase with respect to each other phase.
I originally was just going to run an array for 360 degrees. With pulses
for each degree for the total 3 phases, 120 degrees respect to each other.
I could do this from one of your tables?
But for now what is PR?
Back in 1967 i built 7 electric cars, six from the ground up. DC motors,
relay controls for speed, deep cell lead acid batteries.
I sold that company, then went to college for 10 years. Only now i have
decided to use IGBTs. Very efficient.
I go back to when Bill Gates was with MITS with the altar computer. Just
assembly programming at first. 1975
Thank you for your prompt reply. Just what is PR?
Sincerely,
Herman
…On Mon, Mar 1, 2021, 12:20 PM Kurt Hutten ***@***.***> wrote:
If you figure it out @herman75156106 <https://github.com/herman75156106>,
I'm very willing to accept a PR.
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Kurt, you may also reach me at
[email protected].
Thanks
herman
…On Mon, Mar 1, 2021, 12:20 PM Kurt Hutten ***@***.***> wrote:
If you figure it out @herman75156106 <https://github.com/herman75156106>,
I'm very willing to accept a PR.
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Sorry @herman75156106 Really what I'm saying is that I'm not in a position to do more work on the code/repository, but if you were to get something working and wanted to share it, I would be happy to accept your changes into this code (Pull request is how that's done on github). I'm glad you find my code useful. If you're making electric cars than it's good to draw inspiration from my work, but I think you'll probably want something a bit more powerful than the 8-bit micros I wrote this code for. 32-bit micros are so cheap these days, no reason not to use them. |
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Kurt, yes i do intend to ultimately go to a more powerful processor. The
arduino just spoils me for preliminary design and testing. I am also using
the attiny85 for other dedicated parts of the controller ie issolution via
pulse issolution transformers.
At this instant i am thinking one table array. With 3 control points for
the 6 IGBTs. I will keep you posted.
Thanks for your attention.
herman
…On Mon, Mar 1, 2021, 2:09 PM Kurt Hutten ***@***.***> wrote:
Sorry @herman75156106 <https://github.com/herman75156106>
PR is Github jargon for "Pull request".
Really what I'm saying is that I'm not in a position to do more work on
the code/repository, but if you were to get something working and wanted to
share it, You would be happy to accept your changes into this code (Pull
request is how that's done on github).
I'm glad you find my code useful. If you're making electric cars than it's
good to draw inspiration from my work, but I think you'll probably want
something a bit more powerful than the 8-bit micros I wrote this code for.
32-bit micros are so cheap these days, no reason not to use them.
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Nice @herman75156106 I'll be very interested to hear about any progress 😁 |
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Kurt, i have been thinking much about a 3 phase inverter system.
Contemplating several approaches. the one that repeats in my thinking, i
wish to share with you for your thoughts, objectively?
Simply put: 3 separate cpu with a common external clock, and a fourth
processor to manage the three that actually generate the 3 phases, each
phase 120 degrees phase shift.
One might say too much hardware. An ibm360 mainframe is too much hardware.
A sync trigger from the master cpu maintains sync. all CPUs use same
external ckock.
Your thoughts?
Whatever i end up with i will share with you. I personally have no YouTube
desires. You may use anything i share with you as you wish.
Please advise.
Herman
…On Tue, Mar 2, 2021, 3:29 AM Kurt Hutten ***@***.***> wrote:
Nice @herman75156106 <https://github.com/herman75156106>
I'll be very interested to hear about any progress 😁
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I'm not sure @herman75156106, It does sound like a lot of hardware to me but keen to see how you go. |
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Kurt, i have been attempting to send you pictures of my work, but the mail
system will not allow anything i am attempting. 4 MB is the smallest my
phone camera allows. Is there a way i can send you pictures and eventually
video of my work? Shortly i will be doing 3 phase test on large 3 phase
motors. vedeo would be great?
Please advise. Herman
***@***.***
…On Sun, Mar 28, 2021, 3:13 PM Kurt Hutten ***@***.***> wrote:
I'm not sure @herman75156106 <https://github.com/herman75156106>, It does
sound like a lot of hardware to me but keen to see how you go.
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Oh wow, how exciting. Are you using github via email? |
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Kurt, i think i will just make private video on youtube and send you the
link via this email platform?
In time i may also want to send you my code. I am writing in both arduino C
and pure C. I don't wish at this time to publish to the world. It is
still a work in progress.
In this situation how is the best way to send you my sourcs cods work?
Shortly i will send you youtube links. I prefer to not put source code
piblic at least until the work is more advanced.
Thank you for your attention.
Herman
Ps: today i intend to start actual igbt test on thr AC single phase. this
is not my first work with igbt. I designed a 12 volt dc igbt controller i
intended to use on a steering control for an autonomous farm tractor using
relational GPS. my first use of igbt. I became so excited with igbt i
decided to stop the tractor work and built another electric car based on
igbt. Here i am now....
My 8th electric car. My last car i built in 1869. Relay speed control.
…On Tue, Mar 30, 2021, 1:17 PM Kurt Hutten ***@***.***> wrote:
Oh wow, how exciting. Are you using github via email?
Hmm well you could always just send links to videos uploaded to
https://imgur.com/?
You don't need an account to upload and get a link.
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Kurt, just a short note to advise you tonight i have started voltage test
on the single phase inverter based on your code. I have modified it to
allow changes in frequency and sindivission. just low dc in now with no
load on the ac output.
I would like to send you video, if needed via YouTube?
Shortly i will go to higher voltage. I need to finalize the igbt snubber.
Please advise of your interests?
Herman
…On Tue, Mar 30, 2021, 4:03 PM LM741 ***@***.***> wrote:
Kurt, i think i will just make private video on youtube and send you the
link via this email platform?
In time i may also want to send you my code. I am writing in both arduino
C and pure C. I don't wish at this time to publish to the world. It is
still a work in progress.
In this situation how is the best way to send you my sourcs cods work?
Shortly i will send you youtube links. I prefer to not put source code
piblic at least until the work is more advanced.
Thank you for your attention.
Herman
Ps: today i intend to start actual igbt test on thr AC single phase.
this is not my first work with igbt. I designed a 12 volt dc igbt
controller i intended to use on a steering control for an autonomous farm
tractor using relational GPS. my first use of igbt. I became so excited
with igbt i decided to stop the tractor work and built another electric car
based on igbt. Here i am now....
My 8th electric car. My last car i built in 1869. Relay speed control.
On Tue, Mar 30, 2021, 1:17 PM Kurt Hutten ***@***.***>
wrote:
> Oh wow, how exciting. Are you using github via email?
> Hmm well you could always just send links to videos uploaded to
> https://imgur.com/?
> You don't need an account to upload and get a link.
>
> —
> You are receiving this because you were mentioned.
> Reply to this email directly, view it on GitHub
> <#9 (comment)>,
> or unsubscribe
> <https://github.com/notifications/unsubscribe-auth/ATBJFQYZ5ZIZBKVLDRIW34TTGIISRANCNFSM4SQKNH2A>
> .
>
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Sorry @herman75156106, I've been moving house and a bit unsettled. All sounds very exciting. Yeah I'd like to see anything you've got working. You can use youtube or what ever is easiest. You can upload videos directly to github, just probably not through the email interface. You'de need to sign into the web app. But again what ever is easiest. |
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Kurt, just a short note for now. I ask you do a simple Google research on
the 3 terms:
1. 120 degree mode of conduction
2. 180 degree mode of conduction
3. 150 degree mode of conduction
It appears the 150 degree mode will produce a spwm.
Please advise of your thoughts?
I now have 2 inverters. 1 a single phase.
2 a three phase. I will shortly advise you in video of them.
Thank you for your attention
Hernan
***@***.***
…On Fri, Apr 23, 2021, 5:49 PM Kurt Hutten ***@***.***> wrote:
Sorry @herman75156106 <https://github.com/herman75156106>, I've been
moving house and a bit unsettled.
All sounds very exciting.
Yeah I'd like to see anything you've got working. You can use youtube or
what ever is easiest. You can upload videos directly to github, just
probably not through the email interface. You'de need to sign into the web
app. But again what ever is easiest.
—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
<#9 (comment)>,
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Kurt,
https://www.youtube.com/watch?v=Jl8PHbv4KQs, this is a youtube video that
explains 180 degree operation for a three phase inverter.
There is a wealth of both youtube and google information on 120, 150, and
180 degree inverter operations.
I will video document my work for you with 180 degree operation.
More shortly.
herman
…On Sun, Apr 25, 2021 at 4:15 AM LM741 ***@***.***> wrote:
Kurt, just a short note for now. I ask you do a simple Google research on
the 3 terms:
1. 120 degree mode of conduction
2. 180 degree mode of conduction
3. 150 degree mode of conduction
It appears the 150 degree mode will produce a spwm.
Please advise of your thoughts?
I now have 2 inverters. 1 a single phase.
2 a three phase. I will shortly advise you in video of them.
Thank you for your attention
Hernan
***@***.***
On Fri, Apr 23, 2021, 5:49 PM Kurt Hutten ***@***.***>
wrote:
> Sorry @herman75156106 <https://github.com/herman75156106>, I've been
> moving house and a bit unsettled.
>
> All sounds very exciting.
>
> Yeah I'd like to see anything you've got working. You can use youtube or
> what ever is easiest. You can upload videos directly to github, just
> probably not through the email interface. You'de need to sign into the web
> app. But again what ever is easiest.
>
> —
> You are receiving this because you were mentioned.
> Reply to this email directly, view it on GitHub
> <#9 (comment)>,
> or unsubscribe
> <https://github.com/notifications/unsubscribe-auth/ATBJFQ55JABOLO6RTVJQ7WTTKH2OZANCNFSM4SQKNH2A>
> .
>
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thank you for providing such a great article with explanation.
can you please modify the same code by using timer 0 and timer 2 as i am doing a three phase inverter and i need three spwm signals from arduino uno.
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