Endless Sphere

With the rotation in the error signals you have the 45 degree rotation in the control loop (giving you the stability) but not in the wanted Id and Iq (so you remain FOC). I have this 45 degree rotation in the error signals for both sensored and sensorless modes Lebowski, are you saying the 45 deg r...

To explain the 45 degree thing further, controlling real and imaginary current at the same time is basically a 2 dimensional control problem. To reach the steady state your updates need to 'walk' straight to the steady state point. However, the information telling your in which direction to walk is ...

Does it now run good, also with the fieldweakening etc ? Did you try at higher speeds ?

Cars are Greek to me .... but looks like something a setting in the controller will not fix

I have a 10kW hubmotor with no hub but with holes and threads for a disk brake lying around. An me602 I believe. I also have a 8kW Honda Wave 110 scooter in which the motor is not a load bearing member... replacing the 110cc unit with the hubmotor and a sprocket (attached using the threaded holes) c...

How about using fieldweakening, where the motor inductors kind of perform the job of the boost inductors ?

I still have rubbering shakes when i drive at speed. I tried to rebuild my speedo sensor and it is now out of the way of magnet collar. Feeling is kind of like you would drive on tiles. But when i investigated further it seems this only happens when i have the steering wheel centered or to the righ...

And, if I say so myself, the Lebowski setup has good field weakening.

You can run a SRM sensorless from start with full torque... the tech is what I uploaded here on ES. With a SRM everything is based on the wire inductances varying a lot with the rotor angle. The most difficult bit about a 5 phase controller is finding the appropriate micro processor, one that has 5 ...

john61ct wrote: ↑

May 12 2020 9:32am

Also, any clarification as to how "true FOC" can work in a sensorless setup would be greatly appreciated.

You can read the explanation of my stuff here :
viewtopic.php?f=30&t=104895#p1533225

I used caps per schematic... 1nf if I recall correctly. Should I use less? I dont use any 4K7 pullups since sensors provide push pull signal of their own. I will remove hall assisted setting and test again. BR I think the advanced chip you use is sensitive to the magnet being exactly centered above...

I would not use hall assisted sensorless, then try again. It sounds like the halls cant keep up with the higher motor speed or you have too much caps on the hall lines. Sensorless should be fine.

Just saw the post on your leafdriveblog about backing out and throttle being twitchy. What you can do is in the throttle menu, change coefficients from1,0,0 (which is linear throttle, so .5 throttle gives you .5 torque) to 0,1,0 which is quadratic throttle (so 0.5 throttle gives 0.25 torque). This s...

i have not worked a lot with IPM motors. a little with axial flux. but mostly SPM and separately excited. so this whole salience thing, the details of making it ACTUALLY work is mostly new to me. we were using a fixed 45deg angle just for quick test and got really good results, better than was expe...

Arlo1 wrote: ↑

May 06 2020 9:12am

45 deg rotation in the error signals but not 45 deg in the NON ERROR signals?

I don't know if it is clear what I do, but I posted an explanation here :
viewtopic.php?f=30&t=104895&p=1553063#p1553063

I think there is some confusion as to what the 45 degree rotation of the error signal looks like. I use it for both sensored and sensorless, but the example here is sensored: foc_diagram.png The picture above is the standard setup for sensored FOC you see everywhere. The bit I changed is in this sec...

last week we passed 100kW at 350V on the dyno. @lewbowski, you're right about 45deg being a pretty decent default value for timing adjust. arlo gives a once over tour in the video: https://youtu.be/hYvuRghNGTc Major Milestone achieved. :bigthumb: I think what Arlo1 does here is not what I do... I h...

All (voltage) signals are differential, and almost all are with respect to ground. I would wire twist all signals with a ground wire. The ground twisted wire should be connected on both ends. If your resolver or hall signals are far away, also wire twist these. An exception to most voltages beong gr...

Just like you said, i used 10K/3K3 divider on throttle line and added 470uF cap across 3K3. I got 1s voltage rise to 3V3 and that is enough to reliably start compressor every time. I will now use this with AC clutch signal. YAY! The caps is between the throttle input and ground ? With th 10k to gro...

Added version 2B0. This one implements the 45 degree improvement suggestion.

The complete source code and hex (for easy programming when you have a pickit programmer) can be found in the first post of this thread. Changes are in file determine_update.s

Lebowski i got an idea... and that could be good, or it could be disaster. You never know by me :). How is the throttle function used in code? Is it possible to use it as auto-throttle with a timer and a single input? Instead of analog input there would be 1 or 0 (5V signal) If signal would be 1, f...

I'd try angle of 10, 20, 30 and 40 degrees, and 5, 10, 15 and 20 Hz for frequency. This makes 16 combinations to try...

arber333 wrote: ↑

Apr 28 2020 4:44am

How did you tune up your motor for a good start. Which parameters are involved?

Tnx

Did you play with the wiggle angle and frequency in the misc menu ?

The CAN as implement now is a custom protocol only meant for talking to other controller ICs... it does not conform to any standard so wont work with normal automotive CAN stuff.. but you can always change the code and make this yourself.

Ok i managed to get PUTTY terminal to copy and paste HEX settings! Now i can test various motors and quickly recover settings if something goes wrong. :idea: I noticed though there is no menu to enable 45deg option. What happens if i now choose hall sensors will they be effective at all upwards of ...