Paul & Sabrina's cheap DIY 144v motor controller

[flores]

Can we buy it anywhere? Then I'll take it apart

[MPaulHolmes]

Haha no. Its better suited for the megawatt range. It won't be replacing regular old inverters.

[MPaulHolmes]

Jedsmd, did you ever try the new code I sent? There were fairly significant changes to the structure of the loop, and I was wondering how it sounded (the hiss), and if it drove any different.

[jedsmd]

Originally Posted by MPaulHolmes

Jedsmd, did you ever try the new code I sent? There were fairly significant changes to the structure of the loop, and I was wondering how it sounded (the hiss), and if it drove any different.

Sorry Paul I 've been distracted on other stuff. I will put the code in right now. I got quite a bit of running around to do today so it will get a good test.

Edit:
First reactions; it works, its smooth, it is surprisingly quiet.

[MPaulHolmes]

Phew!!!!!!!!!!!!! It's quieter because the spread spectrum is now 7-11KHz, so the hiss is composed of less audible frequencies. It should create more heat, though. Does your battery gauge meter go crazy while it's running?

[jedsmd]

Originally Posted by MPaulHolmes

Phew!!!!!!!!!!!!! It's quieter because the spread spectrum is now 7-11KHz, so the hiss is composed of less audible frequencies. It should create more heat, though. Does your battery gauge meter go crazy while it's running?

The sound level is nice. It is enough that you can tell when you apply power, but not annoying at all.

The meter was not disturbed by the controller. However I have the parts for the noise filter now, so I intend to go ahead and install it.

Driving is very smooth, overall it feels really solid.

[flores]

okay.. I was away for two weeks (holiday in Tuscany Italy) but now I'm working full force on the raspberry software.. saving settings now works.. and i'm adding logging of the rtd data to a file for analysis.

This weekend the controller is going back in the car !!

[MPaulHolmes]

I shiuld probably send you the most recent code too. Was it a standard 0-5k throttle, with 0Ohm being zero throttle?

[flores]

Originally Posted by MPaulHolmes

I shiuld probably send you the most recent code too. Was it a standard 0-5k throttle, with 0Ohm being zero throttle?

Yes.

[duncan]

Hi Paul,
I'm back - not completely right but I've managed to get some decorating done so I'm allowed to look at my car

Some damage in transit
Nothing serious

I have plugged in what I can,

So there is the IBGT's and their monster capacitor,
And a control board

What is the other board for???
(the one that came completely loose in transit)


I need to make some end bits to support the cables, that will support the current sensors

Then I need to identify the wires on the other two boards

I have included pictures of the Puma my brother made,
I've no idea what I'm going to do with it

I found some water cooling plates on Hobbyking
https://www.hobbyking.com/hobbyking/...dProduct=21192
They are $16/pair
I intend using one under each IGBT

I'm thinking of using a windscreen washer bottle with a built in pump and returning the water via a small cooler under one wing (fender?)