Search found 76 matches

by arber333
Jun 13 2019 7:11am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Point 1 may still be caused by motor resistance not correct, you will need to experiment a bit. Or have a look in the saved conkout data (main menu y, only if you online saved else itll just be the old data) to see what happened. About takeoff, if at full current the torque is not enough it wont go...
by arber333
May 30 2019 6:27am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

1. Tripping Both; i mean tripping overcurrent at some 4Krpm as well as conking out at 8Krpm. 2. eRPM setting Now i have erpm set to 35Kerpm, which is some 8K motor rpm. But it is set exactly to the value. Thanks for explanation, i will set the difference ramp for all you explained. 3. What about the...
by arber333
May 30 2019 12:03am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Interesting drive in what way ? There was lots of power available once motor started reving. From the stop however i would still have to start with 1st or 2nd. 3rd would stall the motor. Is that just the way FOC works or are there some settings to file out...? Also like i said if i would take the m...
by arber333
May 28 2019 11:54pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

I spend some time in Mazda RX8 yesterday. I did like you said and corrected/updated all menus. I put 300A to field weakening, some 75% and i found out motor wanted to turn to 9000rpm on 200Vdc! I reduced erpms then to 35kerpm and it is turning healthy up to 8Krpm. After a short but interesting drive...
by arber333
May 25 2019 5:39pm
Forum: Motor Technology
Topic: Adding halls to BLDC motors
Replies: 98
Views: 9500

Re: Adding halls to BLDC motors

You power two motor phases to align and lock position of rotor and then zero the sensor by shorting a set of zeroing pads. At least on RMC22 sensor, guess same here. works beautifully :D Exactly that! But i figured also that Lebowski controler can find and correct a bit of offset if you just use ze...
by arber333
May 22 2019 12:22am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

I got my motor in the Peugeot 406 now. Soon i will be able to test for myself the full extent of RPM and power the motor will provide.
https://leafdriveblog.wordpress.com/201 ... ame-is-in/
by arber333
May 22 2019 12:08am
Forum: Motor Technology
Topic: Adding halls to BLDC motors
Replies: 98
Views: 9500

Re: Adding halls to BLDC motors

That's pretty cool. Looks like you could use that on almost any motor. I think they made it just that way because you always have access to the rear shaft somehow. Sensor outputs UVW signal as well as ABZ encoder signal for usual inverters. You just have to select correct wires. It is supplied by 5...
by arber333
May 20 2019 11:52pm
Forum: Motor Technology
Topic: Adding halls to BLDC motors
Replies: 98
Views: 9500

Re: Adding halls to BLDC motors

Guess it's this one: https://www.rls.si/en/rmf44-rotary-magnetic-module-on-metal-flange Yes this is the one. RMF44 I chose the U version that has commutation output and D means it reads 4 pole pairs. 12B is 12bit sensor and A12 means it is fitted with molex connector. With it you can buy a 4mm magn...
by arber333
May 20 2019 7:59am
Forum: Motor Technology
Topic: Adding halls to BLDC motors
Replies: 98
Views: 9500

Re: Adding halls to BLDC motors

Yeah... well i lost my calm and went on to buy RLS encoder with commutation output. RMF44UD12BA12. I made a fitting that slides onto resolvers place. On the shaft i fit a polarised magnet that encoder senses. https://leafdriveblog.wordpress.com/2016/11/16/encoder/ That worked so good that car starte...
by arber333
May 12 2019 2:29pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Here is the file from last settings from the drive in the video. Bas would there be any vital settings to change if i use 200Vdc vs if i use 380Vdc? Where in the FOC would i have to change if i wanted to get a similar response? Right now i get good take off with phase current set to 400A and i get o...
by arber333
May 10 2019 2:12pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Ok I can now report that i made some improvement and some not so much... 1. I tried to change PLL frequency and damping. It didnt work I got serious vibration on any change. I reset this to 100hz and 0.8 2. I changed n setting in control loops to 0 or to 24 and 48. The best was at 48. With 0 motor w...
by arber333
May 09 2019 12:31pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Guys i have to finish my work until tomorrow, then i can get to my friend and test the manual FOC range with Mazda in drive mode.
Also i suspect my results might be different since i use 360Vdc battery and he has 200Vdc.
Untill then...

A
by arber333
May 07 2019 2:03am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

OK i tried to measure leaf motor ohm resistance. I used 30V and 10A as a reference. Result was 110.5mV. I tried all phase wires variations. Therefore if i use ohm law.... and get 0,01105ohm = 110.5mohm Then i divide this to get one legs worth of 55.25mohm! Would that be correct? I dont have more po...
by arber333
May 06 2019 3:10pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

OK i tried to measure leaf motor ohm resistance. I used 30V and 10A as a reference. Result was 110.5mV. I tried all phase wires variations. Therefore if i use ohm law.... and get 0,01105ohm = 110.5mohm Then i divide this to get one legs worth of 55.25mohm! Would that be correct? I dont have more pow...
by arber333
May 06 2019 1:42am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Best is to use a current limited supply, but else a 12V car battery with a lightbulb will do. Measure current and voltage across motor and apply Ohms law. Use 2 motor terminals (leave 3rd one open), divide resistance by two for the star equivalent resistance value Will try that later today. So i wi...
by arber333
May 05 2019 3:58pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

I wonder whether 40 is correct though... it will probably work fine too for 80 and maybe even 160 (this would bring it to 1 msec time constant). Not so important for stability, but has a small effect on efficiency when running with field weakening. I wonder what a simple dc measurement would give.....
by arber333
May 05 2019 1:38pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Deadtime distortion makes the resistor measurement very unreliable (but does not affect the inductor measurement much). So more deadtime, more wrong value. It is better to override this value by hand, typical value to aim for is R = L/X, with X roughly 1e-3 (all motor seem to have time constants in...
by arber333
May 05 2019 9:21am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Hi Arber, can you try the car with this '48' valued coefficient (I think It is the last one in the list) in the coefficient menu at 0 and see if it makes any difference ? I am also curious if you notice any difference when bringing the # of transition cycles down from 35000 to 1000 ? Do you have a ...
by arber333
May 01 2019 4:28pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Great news! What gear are you using in the RX8 and how does the overall reduction ratio compare to the Leaf? Top speed on 200V? The real mystery is why your controller was giving you a reading of only 6.66 mOhms. It is a great news yes. I forgot to mention i also changed deadtime to 3.1us and still...
by arber333
May 01 2019 2:28pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Hurah! The car drives without a hitch! Thank you TomDB, Lebowski and thank you Arlo! I revisited some of the FOC settings and slowly increased resistance value untill at 48ohm the motor took off into a steep hill without shaking or hesitation. I use 178uH inductance also. Car felt superb to drive an...
by arber333
Apr 28 2019 4:53pm
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Arlo1 wrote:
Apr 28 2019 1:38pm
I spent a lot of time tuning the transition. Like 100s of hours!!
Hm... true! I will start experimenting. As soon as it stops raining :). You have any instruction where to start correcting?

tnx

A
by arber333
Apr 28 2019 11:19am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Success! I installed the RLS RMB28U8 encoder and magnet sensor in place of original resolver. This encoder reads magnetic field of radialy polarised magnet. When this magnet rotates encoder produces either UVW or ABZ signals. https://leafdriveblog.wordpress.com/2016/11/16/encoder/ When i installed t...
by arber333
Apr 26 2019 12:22am
Forum: Motor Technology
Topic: Adding halls to BLDC motors
Replies: 98
Views: 9500

Re: Adding halls to BLDC motors

Damn! My motor is IPM.
And i set them up towards the rotor so that the side with writing is facing the rotor. They are fixed on the windings.
Is it even worth trying to change their facing since i have IPM motor?
Thank you for your explanation, i didnt know facing is that important.
by arber333
Apr 26 2019 12:17am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

Lebowski wrote:
Apr 25 2019 12:08pm
It matters, they are only sensitive for magnetic field in 1 (out of possible 3) direction
I have them oriented with writing towards rotor. The head is oriented towards the front of the motor.
Should i turn them around or make them stand at 90deg towards rotor?
by arber333
Apr 26 2019 12:00am
Forum: Motor Technology
Topic: Ampera/Volt inverter with Lebowski brain
Replies: 44
Views: 1398

Re: Ampera/Volt inverter with Lebowski brain

We managed to get the car rolling. I just copied Arlos FOC motor reading of 178uH and 43mohm. There is a thing from the start when the motor wants to pull, but just cant manage. If we overcome this then car drives off and it can climb a hill or regen into a valey. So i would rule out incorrect curre...