Endless Sphere

Lebowski? If i may... Last weekend i was playing with recovery menu K. I increased option h) Pulse width from 150us that Arlo declared to about 165us. Values at about 125 or lower would cause motor to surge on startup and on transition through throttle 0. Also some values caused really annoying tran...

Are you referring to menu o) online Kv, L and R ? I can't see anything in the current sensor menu unless menu "f) sub b) perform offset measurement" triggers ongoing re-calibration? I always calibrate current sensor offset simply because I run the DSPIC at ~5.2V as recommended and as a co...

I also spent a lot of time setting the gap and making sure the RLS chip was centered. My RLS chip is centered into the same position the original resolver. I use the copy of resolver mount and i have CAD made center step for the RLS plate. That should be flawless. The vertical gap however could be ...

One huge win I had was a resistor in series with the gnd of the rls encoder You will have to dig though my posts to find it. Well i have tried first with one 10R resistor inline on the RLS sensor supply line GND and i must report there was even more motor bucking on start. I actually dont have 15R ...

I hope you meen the inverter enclosure and not the traction pack negative? YOU NEVER connect either side of the main battery (Traction pack) to the chassis! Yes yes of course. I ground motor, inverter and just about anything i added into the car by 6mm2 straps. Power cables are rubber coated weldin...

One huge win I had was a resistor in series with the gnd of the rls encoder You will have to dig though my posts to find it. I found your post back from 2017. So after all that I realized what made it super awesome and buttery smooth... The ground wire was breaking and as it got weaker it gained re...

So what did you use to get better response? Did you just lower winding resistance and add more phase torque? Or did you advance RLS encoder signal? By how much? I tried up to 35deg and there wasnt any improvement. Do i have to use real degrees? That would be 4x35deg = 140deg electrical? Now everythi...

Hi Lebowski I still consider starting torque with my motor rather lame. I have read on the characteristics of IPM motors. As you may know Leaf motor is 8 pole IPM motor. I wanted to ask you if you considered IPM motors with your software? Here there are two torque components. One reactive and one re...

Have you disabled also the online current sensor calibration ? This one can run away and cause problems after a while, if turned on. This one can be disabled in the currents menu I think, something about current sensor calibration when current under ..A Yes! I had to disable both. Online hall senso...

I got some time to play with motor settings some more. So i figured something that is quite obvious, but it diddnt occure to me before. Lebowski inverter has option to save hall sensor position in case of errors and ovrcurrent events. Also manual position saving is performed for sensor calibration. ...

At one point Lebowski was recommending an L/R ratio of 1e-3, I don't think that is still current but the point I am making is that the suggestion at the time was to increase R to achieve that not reduce L. It is established that the controller can not measure stator resistance perfectly so we know ...

True! I will get rid of all the filtering ASAP. Also i will route the sensor cable away from motor. Currently it goes via direct route from motor rear end to the inverter which is like a meter or so. Also i have the cable grounded only at one end, at the inverter. I will try to ground it also at the...

Finally new mount is in. It was done propperly like i should have done before :roll: https://leafdriveblog.wordpress.com/2020/11/10/busted-rear-mount/ Now i tried again with 220uH and 100mOhm setting and i found out that motor can start rather smoothly although minimum power. Then at some 45km/h (ma...

That is really strange, that feature is intended for situations where there is sudden acceleration like when a off road dirt bike looses traction going over a jump or similar. It should not be necessary to use that feature to get you Leaf motor to run smoothly which I expect is the reason Lebowki d...

Try setting it back to 230mH and stator resistance to say 100mOhms and disable Hall assisted sensorless and take it for a test drive. I know Arlin lowered stator inductance down to get maximum horse power but I think you will get better behaviour from the motor if you set it closer to its actual va...

Hm... interesting. Last weekend i went on and started to calibrate like you said. Over 100 samples patiently collected with small steps of +/-1,5deg. Curiously the final value kept moving away from me in steps of 1 or 2deg. Then finally i lost my patience and commanded a 10deg step. I collected more...

Really appreciate this thanks! Yesterday i was driving and calibrating hall sensors. First i tried to calibrate them with my wheel up. I got very different results. One time i managed to get a fast response from the motor on start. I got 3 sensors at 7 confidence and 3 at 6. Otherwise they are all 6...

That is good news. I took a look at your config file and noticed you had 11.35 degrees error with standard deviation of over 23 degrees in your Hall signals. Good that you have re-tuned them, you should be able to get the error down to 1 degree or so. It is not a bad idea when tuning the Hall error...

Another update.... I stil got various shakes in the motor before mode 3. Now i tried to change various control parameters and without luck i started to shift my thinking from 3rd gain parameter of mode 2 to the whole picture. This is menu g. First i corrected the 2nd gain parameter under option f to...

OK i think i got the car to takeoff much better now. What i did was change g) sub g to 12 and there it was running the best. I also recalibrated hall sensors menu. and lowered some transition values from mode 2 to 3. In the beginning there is a slight shake or undecision and a little roughness but i...

Lifting one wheel off the ground should be sufficient to run the motor in sensorless mode. It may pay to raise the mode 2 --> 3 erpm so you can get the motor run continuously in mode 2. The start in the YT video looks pretty good but hard to say for sure because of the music in the background. Have...

Yes inverter is dual separate brain. One for FOC PMSM and second for ACIM motor
https://openinverter.org/forum/viewtopic.php?f=2&t=1027
https://www.youtube.com/watch?v=WSG2sLakpPk

I will post design when i am confident bugs are out. .

This time i used the rear Aux power section which is located under the main cap. Phase cables are routed to the front face of inverter and one can get the connector from Mouser or Digikey. First prototype drive i made with a small PCB that i could fit next to previous single board inside Volt invert...

Here are my settings in hex format. I have changed the g menu value to 5 and i think i get smoother takeoff. However when i played with throttle curves i got different results from same settings. Strange. My throttle is 1.3 3 0 My regen is -0.3 0 0 Doesnt that mean it is ok? 1.3 - (-0.3) is essentia...

I will post my file... Currently my motor is in a car and i want to keep it there :). It runs really good. But i need to tune up the transistion. Do you think i can do that with one wheel in the air? I think when unloaded motor does not show the same indecision at start. This only happens when i loa...