Endless Sphere

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...

YA! It is much better. I used PLL value 50 and tried as low as 35 and i think 50 is better. I kept filtering at 0.88. Then i increased 2nd order parameter "g" in menu G from 0.3 to 1.8! It immediately felt smoother traction though acceleration was not all that great from 0 to 30. I guess l...

It is that below 300 erpm range that you need to get running as smooth as possible to get clean transitions from drive mode 2 to drive mode 3. I have found that for high pole pair count hub motors that the default settings always work exceptionally well but in low pole pair motors like the IPM moto...

Here is the working version of Huebner inverter with lacrosse motor. I still have some things to resolve but i have positive throttle control with resolver interface. Mostly it seems to be EMI.
https://youtu.be/7Xq03S_Bpwg

Please tell me what parameter you did setup for a smooth start. Right now i have very good pull after 10km/h and insanely good after 30km/h. But before that from standstill there is some shaking like motor couldnt decide to which side it wants to turn to. Lowering the transition further wont do sinc...

Great news. Does that mean that those rumbling noises you thought were coming from the leaf motor were mechanical all along and nothing to do with the Lebowski parameters? Exactly! CV shaft was rubbing on the edge of CV tripod casing. Whenever the three lips of the casing would come near the shaft ...

Well, remember when i said i had siezed LH CV joint tripod bearings? Well that was not true. Rather i made a dumb mistake when copying the length and forgot to pull out on the tripod so it would be extended like in its natural position. Instead i just copied it in the innermost position with wheels ...

I still havent changed the CV joint, but i changed motor settings. I used 75uH and 48mR like Arlo mentioned in one of his earlier posts. This setting gave more power from start and ability to spin rubber. However there is still shaking in control when starting from 0 and this causes delay. I noticed...

Well i found out what was bothering my Pug. The left inside CV joint has a halfhsiezed bearing. In by itself i couldnt determine that since the wheels had so little resistance when lifted up. It was only when my friend an i tried to rotate both wheels simultaneously we noticed the LH side was grabbi...

Retainer is now in and i need to wire the battery and BMS in again. Will report back... EDIT: The rubbing is still present so the retainer was not the cause of it. EDIT2: I am thinking it might be the RH driveshaft. It may be oscillating and causing the rubbing. EDIT3: Or i might have assembled the ...

Well the first time I went fast I got to 100km/h on GPS. But now I am a bit reluctant to try more before I get the retention plate in. Otherwise motor still wanted to pull at that speed. I think fw starts at 4krpm mechanical and works really good. Regen as well. I had to shield my phase cables. I wi...