Finally tested my own VFD (video & pictures)
Hello power electronics enthusiasts!
How are you today?
Like the title says this post is about my VFD project. And what a better place to start then to refrence my first post here at edaboard.
https://www.edaboard.com/threads/326338/#post1395524
lol :laugh:.
Well anyway i have come quite far since then, i have actually built and testet my own VFD though a very crude one!
The amount of time i spent researching this and the amount of hipfiring things.. im suprised it turned out this well!
And id like to add that the biggest programming ive done before is something like an led routine on an arduino with breadboard.
And in soldering i think i soldered a transistor with a potentiometer for a 24v dc fan with a veroboard.
I have taken big leaps with this project, and i might do a better write up later of my whole experience.
In a nutshell i soldered a big ass gate control card with a PIC18F4431 and three IRS2113 drivers.
And a seperate 6 discrete IGBT card. Everything on verobard.
Used a 60v 3A supply as my first test on an 230/400 50Hz 2.3A Induction motor, delta connected.
The potentiometer was not implemented for this run, because trying to calculate the frequency input and scale for volt/hertz and changing timer0 reload value slowed the whole thing down to mush with XC8.
Im currently taking my time to remake the program and will hopefully someday fix this issue, might be my lack of understanding proper C programming that made it all slow down.
Anyways I used 1 slide switch for "run or stop" command, and one slide switch for "forward 50hz or reverse 10hz" with precalculated values.
Here is the video:
https://www.youtube.com/watch?v=djPJI0xilC4
And wow what an satisfaction when i did the first run at 10hz and heard a slight coil whine and i watched the current go up. man if i only could describe the feeling!