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

[motorulf]

I want to include a picture also, but i only have 4 posts
By posting this i can send an image in the post below...

[motorulf]

[thingstodo]

I would add a couple of resistors on the board, and one in series with the switch, to limit the max current into the micro.

Perhaps a 22K from Vcc (whether that is 5V or 3.3V) or your top trace on the board to the PIC pin or middle trace on the board. A 10K resistor from the PIC pin, or middle trace on your board, to Gnd, the bottom trace on your board. This one is shown as 'some resistor. That sets up a voltage divider for about 1/3 of Vcc on the input pin, which should read as 0 or OFF.

The switch would go in series with a 2K2 resistor - top trace to your switch .. green wire ... which is now wired in parallel with the 22K resistor. That sets up the PIC pin for about 85% of Vcc and should read as 1 or ON.

These resistor values are ones that I typically use. They limit current under 3 mA and are easy to buy. I didn't look up the specs on the PIC, but I don't expect any issues with low current into the PIC pin.

[motorulf]

Yep, good idea to limit the current thank you!

[MPaulHolmes]

Looks good so far motorulf. Just a couple fixes. In C, = is assignment, and == is a test. For example you would do:

if (x == 1) {
Wow! I can't believe it! x is one!
}

y = 1;

// y now contains the value of 1

[motorulf]

So, now i wanted to do some bench testing.
I have only contected 24v, throttle, led, rs232, current sensors and IGBTs.

What might cause the hardware fault?
Also i have measured all cables to the current sensors, they are connected, im shure...
I have also tried connecting other sensors, makes no difference.
I am not very good at analysing electronic hardware problems, please give me some advice

[MPaulHolmes]

Make sure you power the +24v where it says "24vGnd" and +24v. They are big, heavy spade connectors. The silkscreen writing is swapped (the only mistake, but fortunately, there's reverse polarity protection so it's not harmful), so make sure the +24v goes where it says 24vGnd, and the 24v ground plugs into the spot where it says +24v.
What current sensors are you using?

[motorulf]

Ah! ok, that is why it didnt want to start. haha
When it didn´t start I thought the smaller one was for logic and the bigger for IGBT drivers or something.
So i connected both, wich probably made the fuse blow.
While testing futher i didn´t connect to the spade connectors as it seamed to make no differense.

Now i tried to bypass the broken fuse, connecting +24 to the one named gnd, SCARY hehe
Makes no differense...

I have the cables going thru LEM HASS200-s, but i have also LEM HASS300, and some other LEM wich came from a i-Miev batterypack.

[MPaulHolmes]

You connected both how? Did you mean you connected +24v on the spade input +24v, 24v ground on the spade input 24vGnd, +24v on the little test +24v to the left of the spade, and then 24v ground on the GND just to the left of the little +24v?

[motorulf]

Yes thats right, exactly what i did.