Paul and Sabrina's Cheap 3 Phase Inverter (AC Controller) with Field Oriented Control

[BogdanT]

Originally Posted by thingstodo

The bus-voltage pulses get reflected to a lower or higher extent when they reach the change of impedance at the motor terminals .. I think that's an acceptable translation of the sort-of understandable videos that explain that stuff ...

I have seen 2.25x bus voltage at the output terminals of the IGBTs, before the turn on/turn off resistor values have been adjusted to minimize overshoot. And 2 ms is more than enough time to blow up your IGBTs

Yes that's correct about the voltage spikes, but I was referring to the AMP draw spec on the IGBT (IC max).I'll just prototype around these for now, aiming for a current limit of 350A per phase and we'll see from there.

PS: I've also gone back to the design board a bit ... might just opt for a DC series motor for the first setup (didn't buy the AC35 yet)

[thingstodo]

Originally Posted by BogdanT

Yes that's correct about the voltage spikes, but I was referring to the AMP draw spec on the IGBT (IC max).

I guess I read that wrong. Sorry

[BogdanT]

Originally Posted by thingstodo

I guess I read that wrong. Sorry

I wasn't very clear myself there

[ScottyWarpNine]

I haven't had time to work on this in a long time, and I don't see myself getting back into it any time soon unfortunately.
If anybody is interested, I'd sell my fully assembled inverter board for $100 shipped. I feel like that is fair for what is essentially an untested board. It has always been stored inside an anti-static bag and that is how it will be packed.
I was never able to establish communication, and I was unable to determine if that was because of my lack of experience with PICs, a faulty knockoff pickit3, or an issue with the board itself.






PM me if you're interested. I'll only ship within the continental US.

[jackbauer]

PM sent. Very interested in this.

[latimer]

PM sent. Also very interested.

[LouMan]

It always happens when you don't have any money!!!! figures....

[jackbauer]

Ok this may seem like a strange request but can someone confirm to the world that I'm not a Russian hacker / fraudster?

[BogdanT]

))) what's the catch? Where do we confirm? Are you getting sued for reverse engineering? )

[Piotrsko]

You ARE Irish. That's scary all by itself.