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Search: Posts Made By: jyanof
Forum: Open ReVolt: open source DC motor controller 06-28-2014, 01:59 AM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
We want pictures!

We want pictures!
Forum: Open ReVolt: open source DC motor controller 04-11-2014, 03:46 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
They make these, however I couldn't find any that...

They make these, however I couldn't find any that were rated at (very) high current. I also didn't look too hard.

These are from this site (http://www.cloudelectric.com/category-s/12675.htm),...
Forum: Open ReVolt: open source DC motor controller 04-01-2014, 03:35 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
Just my opinion, but when i tried the 8khz...

Just my opinion, but when i tried the 8khz software on my controller, i found it very annoying, moreso than the 1.5khz noise from the Curtis 1231 i used to have. 8khz was quieter, but more piercing...
Forum: Open ReVolt: open source DC motor controller 04-01-2014, 03:26 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
all this new activity!

i've missed a bunch of stuff! that's what i get for not checking the board in a while.

Paul - i've been helping 64jeep a bit with his controller and we did a similar setup for the 3 drivers.
...
Forum: Open ReVolt: open source DC motor controller 08-23-2013, 02:13 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
Just to review some history of this design and...

Just to review some history of this design and its many applications, there are many instances of the controller's thermal cutback algorithms working correctly and saving the controller from failure....
Forum: Open ReVolt: open source DC motor controller 06-25-2013, 01:38 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
This isn't really on-topic for this thread, but I...

This isn't really on-topic for this thread, but I thought like this, too, until I tried it. Turns out the inertia of a 9" motor IS significant - down-shifting gears took way too long and up-shifting...
Forum: Open ReVolt: open source DC motor controller 06-16-2013, 12:06 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
In addition to other suggestions, I've had issues...

In addition to other suggestions, I've had issues with the motor over speed tripping at seemingly random times. I traced it to times when the motor is spinning in neutral and I apply power and ease...
Forum: Open ReVolt: open source DC motor controller 05-29-2013, 05:15 PM
Replies: 11
Views: 6,730
Posted By jyanof
Issues..

There's been a couple issues so far, one still unresolved.

The belt was a little loose at first and would squeal when the clutch closed, then squeal hard again about 2 seconds later - not sure...
Forum: Open ReVolt: open source DC motor controller 05-29-2013, 05:11 PM
Replies: 11
Views: 6,730
Posted By jyanof
Temperatures..

For the most part, everything has been working pretty well. The hottest it's been so far is about 105F (which means its 125F in the cabin when you first get in) and the a/c has performed comparably...
Forum: Open ReVolt: open source DC motor controller 05-12-2013, 04:39 PM
Replies: 11
Views: 6,730
Posted By jyanof
Early video

Here's an early video of the motor spooling up and down.
http://www.youtube.com/watch?v=QmAVvHeJLT8&feature=youtu.be
Forum: Open ReVolt: open source DC motor controller 05-12-2013, 03:52 PM
Replies: 11
Views: 6,730
Posted By jyanof
Some other challenges:

Some other challenges:


I blew up an IGBT module by slamming the motor with full output - it requires a soft start to spool up the motor slowly and keep the current low. So, the program now...
Forum: Open ReVolt: open source DC motor controller 05-11-2013, 10:08 PM
Replies: 11
Views: 6,730
Posted By jyanof
Inverter for single phase 230vac induction motor (A/C)

the purpose of this thread is to document the current state of an inverter i built and, to some extent, document my adventure with air conditioning which this inverter powers.

A quick history:...
Forum: Open ReVolt: open source DC motor controller 04-27-2013, 02:02 AM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
I doubt it's the pot based on your previous...

I doubt it's the pot based on your previous charts. The output from the controller indicate that the pot is working well.

Would you repeat the test with another volt meter on the controller input...
Forum: Open ReVolt: open source DC motor controller 02-01-2013, 11:26 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
It's a little tough to tell what's going on in...

It's a little tough to tell what's going on in this chart, but there definitely some things that don't look right.

first, you have t-pos-gain and t-pwm-gain both set to 120. i'm guessing you're...
Forum: Open ReVolt: open source DC motor controller 01-22-2013, 12:12 AM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
assuming you have a series wound motor like a...

assuming you have a series wound motor like a warp 9 or something, you'll have 4 connections on it, 2 for the armature (rotor) winding and 2 for the field (stator) winding. don't quote me on the...
Forum: Open ReVolt: open source DC motor controller 01-19-2013, 12:47 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
In both graphs you posted, and all 3 events shown...

In both graphs you posted, and all 3 events shown in the graphs, the same thing happens:

1 - motor current tracks the command current at first: notice the blue and red lines are on top of each...
Forum: Open ReVolt: open source DC motor controller 11-27-2012, 04:38 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
yeah, in my application, the high barrier...

yeah, in my application, the high barrier capacitance in the DCDC caused the micro to lock up, but the fets were still fine. it was really weird, but using the powerex dcdc solved it.

would you...
Forum: Open ReVolt: open source DC motor controller 05-30-2012, 12:48 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
for testing, i think you'll just have to hook up...

for testing, i think you'll just have to hook up the current sensor. also, without any current actually flowing, the controller will just go to full on in an attempt to increase the output current. ...
Forum: Open ReVolt: open source DC motor controller 05-04-2012, 12:24 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
Exactly! and so, for me at least, there are...

Exactly! and so, for me at least, there are normal every-day occurrences that are like parade mode - creeping up the driveway, pulling out of a parking space, picking up crap food in a drive...
Forum: Open ReVolt: open source DC motor controller 01-11-2012, 02:11 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
Bummer! I forgot what DCDC you were using on...

Bummer!

I forgot what DCDC you were using on this new controller, but i just thought I'd remind you that those 6W Cincon DCDC's won't work in a high side configuration.


so, in the new...
Forum: Open ReVolt: open source DC motor controller 11-11-2011, 12:38 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
Mileage update! I've been running on my new...

Mileage update!

I've been running on my new lithium cells for a couple months now and have started putting on miles again.

I now have 8500 total miles on the controller and 11,500 miles all...
Forum: Open ReVolt: open source DC motor controller 05-30-2011, 04:07 AM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
Cool! Just an experience of mine... I tried...

Cool! Just an experience of mine...

I tried something similar when I was developing the powerboard for my charger. I had the mosfet and diode on different heatsinks so they could be attached...
Forum: Open ReVolt: open source DC motor controller 02-06-2011, 01:26 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
i was curious about the impact of heat spreader...

i was curious about the impact of heat spreader material and width, and I happened to have my work computer at home, so I did a quick thermal model to see what happens.

Keep in mind this was done...
Forum: Open ReVolt: open source DC motor controller 12-02-2010, 04:43 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
A while back I was curious about this and plotted...

A while back I was curious about this and plotted it up using the circuit and values from the datasheet. Excel does curve fits pretty easily, and it looked somewhat 3rd order (I was hoping it was...
Forum: Open ReVolt: open source DC motor controller 09-15-2010, 12:57 PM
Replies: 7,381
Views: 2,402,711
Posted By jyanof
i was just complimenting the great job you did...

i was just complimenting the great job you did with the electronics design and layout :)
Showing results 1 to 25 of 38

 
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