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Search: Posts Made By: kalidasbala
Forum: Fossil Fuel Free 03-18-2017, 01:26 PM
Replies: 3,480
Views: 912,335
Posted By thingstodo
Sorry about that - I got carried away and did not...

Sorry about that - I got carried away and did not attempt to answer your question!

The CANbus devices talk to each other as well as to the ECU. The data is published to the bus and any other...
Forum: Fossil Fuel Free 03-18-2017, 01:14 PM
Replies: 3,480
Views: 912,335
Posted By thingstodo
I won't be that far along for a while :thumbup:...

I won't be that far along for a while :thumbup: ... and I'll be bugging you for pointers while I hook things up.

I am planning to video what I am doing, in case it is interesting for anyone. No...
Forum: Fossil Fuel Free 02-27-2017, 11:55 PM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
I used one of the AC control/driver boards to...

I used one of the AC control/driver boards to make a 240v/120v split phase inverter, so that there are 2 120v supplies, and a neutral. The 2 120v supplies are 180 degrees out of phase, so you can...
Forum: Fossil Fuel Free 01-21-2017, 04:18 PM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
oh yes! precharge resistor/capacitance/time. ...

oh yes! precharge resistor/capacitance/time. You need to figure out the RC time constant for your setup. Like this:

Let's say you are using 1000uF of bus capacitance, and you are using a...
Forum: Fossil Fuel Free 01-21-2017, 04:08 PM
Replies: 3,480
Views: 912,335
Posted By motorulf
The precharge resistor value is a function of...

The precharge resistor value is a function of capacitance, time and voltage.
I dont have a formula though. Or... i found this...
Forum: Fossil Fuel Free 01-21-2017, 03:48 PM
Replies: 3,480
Views: 912,335
Posted By motorulf
OK, here are the DIFF-files for my reverse...

OK, here are the DIFF-files for my reverse function hack.
I used source code from Jan-06-2017.
Paul, may i attach that version of source code here?

Diff.zip (http://improvisera.net/Diff.zip)
...
Forum: Fossil Fuel Free 01-21-2017, 03:49 AM
Replies: 3,480
Views: 912,335
Posted By motorulf
Yes, i was waiting for it for 10 minutes, I could...

Yes, i was waiting for it for 10 minutes, I could not notice it doing anything. I tried a couple of times.

Now i am working again, will be on tour for 4 months, no time to play with my electric...
Forum: Fossil Fuel Free 01-20-2017, 05:13 PM
Replies: 3,480
Views: 912,335
Posted By ale0502
Hi, what is promised is due, so here is an image...

Hi, what is promised is due, so here is an image of my staff.

http://img.overpic.net/images/x/3/q/xx3q1x9ba9dcgklkahu2c.jpg

Back to the equation of ki, my brushless motor has 0,6ohm of...
Forum: Fossil Fuel Free 01-05-2017, 12:43 PM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
OK the Kp 41,000 is way too big. It is probably...

OK the Kp 41,000 is way too big. It is probably resulting in some overflows in software. Are you sure that was the result of a PI test? It is supposed to stop at like 17,000 or something like...
Forum: Fossil Fuel Free 01-03-2017, 12:55 PM
Replies: 3,480
Views: 912,335
Posted By motorulf
So, now i wanted to do some bench testing. I...

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...
Forum: Fossil Fuel Free 12-27-2016, 03:28 AM
Replies: 3,480
Views: 912,335
Posted By arber333
Well i hope you all had merry christmas and i...

Well i hope you all had merry christmas and i wish you happy transition to new year 2017, to be close to your families and successful.



Right now i use 2x 100uF 800V in paralel. FFVE6B0107KJE...
Forum: Fossil Fuel Free 12-26-2016, 12:10 PM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
YOu can try it out, and if under heavy load, the...

YOu can try it out, and if under heavy load, the capacitor gets too hot, you could always add another. 1 test is worth a thousand theories!

Yes, to use a pot instead of a hall effect throttle,...
Forum: Fossil Fuel Free 12-24-2016, 02:02 PM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
Electrolytic caps have a higher ESR and stray...

Electrolytic caps have a higher ESR and stray inductance, and lower ripple current rating, but should be fine for an inverter. It might be a good idea to add a snubber cap or 2 along with the...
Forum: Fossil Fuel Free 12-24-2016, 11:39 AM
Replies: 3,480
Views: 912,335
Posted By arber333
ok Paul I tried to test with motor as type 2...

ok Paul

I tried to test with motor as type 2
no luck so far. i can run PI test and motor spins a bit and then i get the value of Kp, Ki and PI.
When i try to start angle offset test nothing...
Forum: Fossil Fuel Free 12-18-2016, 12:20 PM
Replies: 3,480
Views: 912,335
Posted By arber333
Hi paul I have replaced drivers. I havent...

Hi paul

I have replaced drivers. I havent put PNP NPN transistors on yet. I wanted to try circuit without them first.
I connected EVERY emitter to common collector like you said. Unless there is...
Forum: Fossil Fuel Free 12-11-2016, 09:47 AM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
Battery is 5.6kwh, 93v A123 cells from a spark...

Battery is 5.6kwh, 93v A123 cells from a spark EV. Capable of about 100kw! Maximum charge rate during the right time of year should be around 50 amps from the panels.
Forum: Fossil Fuel Free 12-10-2016, 08:15 PM
Replies: 3,480
Views: 912,335
Posted By arber333
Well... i have it like this now: ...

Well... i have it like this now:

+12V-->EV200 coil+ --> EV200- -->small relay contacts-->GND
while i command small relay trough PCB relay ===> relay PCB+ --> relay PCB- -->GND
==> is actually...
Forum: Fossil Fuel Free 12-10-2016, 07:22 PM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
Wait on applying battery voltage. Make sure we...

Wait on applying battery voltage. Make sure we are on the same page for contactor control.

First, it goes like this:

+12v ---------------------- contactor in (on board)
contactor out(on...
Forum: Fossil Fuel Free 12-10-2016, 06:37 PM
Replies: 3,480
Views: 912,335
Posted By arber333
Inverter set

I have prepared inverter for motor start.
First i wired everything like it should be, tyco contactor and all, then i checked. It seems i always make mistake at wiring pedal... I have that written...
Forum: Fossil Fuel Free 11-30-2016, 11:42 PM
Replies: 3,480
Views: 912,335
Posted By thingstodo
I have not seen a primer for three phase AC...

I have not seen a primer for three phase AC inverters.

The wikipedia article is OK as far as it goes

https://en.wikipedia.org/wiki/Power_inverter

My poor and disjointed summary:
- The...
Forum: Fossil Fuel Free 11-28-2016, 10:44 PM
Replies: 3,480
Views: 912,335
Posted By thingstodo
My un-informed opinion, and a few un-informed...

My un-informed opinion, and a few un-informed assumptions
- 20 kw = 26.8 hp (I need this for torque)
- 5,000 rpm for a decent small AC motor (it should be higher)
- 2 pole motor (3600 rpm at 60...
Forum: Fossil Fuel Free 11-17-2016, 12:38 PM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
Here's a quick demonstration of 50 amps of...

Here's a quick demonstration of 50 amps of battery regen current, which was enough to make it skid to a halt:
https://www.youtube.com/watch?v=eTSo0OJLIXI
Forum: Fossil Fuel Free 11-10-2016, 07:13 AM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
It is 8 pole (4 pole pairs). Here's a video I...

It is 8 pole (4 pole pairs). Here's a video I just finished with testing it on our go-kart. I don't think it would spin if the pole pairs were wrong:
https://www.youtube.com/watch?v=6FUEo_TXSDg
Forum: Fossil Fuel Free 11-05-2016, 10:10 AM
Replies: 3,480
Views: 912,335
Posted By arber333
I decided to at least make a good box to mount...

I decided to at least make a good box to mount the hardware for inverter in it. Later i will adapt plugs and contacts to fit only from outside.
Check the brass rails and mounting of the main PCB.
...
Forum: Fossil Fuel Free 03-01-2016, 09:59 AM
Replies: 3,480
Views: 912,335
Posted By MPaulHolmes
You can just watch the change in voltage over...

You can just watch the change in voltage over time. Or use 80% done, or anything you want! That part of the code doesn't exist yet, but would probably take like 30 minutes. A shorted IGBT would...
Showing results 1 to 25 of 26

 
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