Search found 80 matches

by emmgee
Apr 11 2016 5:17am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224843

Re: Lebowski's motor controller IC, schematic & setup, new v

ThanX Lebowski for the useful video and the new v2.6 user manual on page 1 here. The effect of field weakening seems to be much bigger than I thought! Questions: 1) With A_fieldweakening at 70% of "b)" "b)max motor phase current" the rpm are doubled. Assuming that the iron is not saturated: Is it po...
by emmgee
Mar 08 2016 4:52am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224843

Re: Lebowski's motor controller IC, schematic and setup manu

This is like a thrilling detective story! If good parameters for the difficult MAC can be found, this will be helpful for other motors as well.
Thanks Lebowski for putting up the setup manual for v2.5 on page 1 of this thread.
by emmgee
Feb 19 2016 9:18am
Forum: Motor Technology
Topic: New Lebowski disciple!
Replies: 67
Views: 14902

Re: New Lebowski disciple!

Ah yes, I've seen you choose 15 Ohm and 4.7 Ohm to drive IPFP 4568 (typ/max 151/227nC) resulting in charge/discharge times of ~263/63 ns. With IRFP 4468 (typ/max 360/540C) charge/discharge would be doubled. Discharge current with 3.2A still in an acceptable range. So the problem must be somewhere el...
by emmgee
Feb 19 2016 4:37am
Forum: Motor Technology
Topic: New Lebowski disciple!
Replies: 67
Views: 14902

Re: New Lebowski disciple!

Marc, I think you are right that "f) autocomplete, restore calibration" doesn't need the motor connected and that the hall sensors are automatically assigned to the phases. But maybe Lebowskis remark about the FET capacitance is relevant for your problem. Approx. 100nC (lebowski with IRFP 4115) vs. ...
by emmgee
Jan 15 2016 3:03am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 580
Views: 106354

Re: Hi power high voltage inverter build for nissan leaf mot

My highest admiration Arlo!
Lebowski: Arlo once mentioned a possible error in menu 'g) control loop coefficients' / phase control loop, drive 2 / 'g) 3rd order'
He set it at 0.3 instead of 0.0299 (less than 1/40 of 'f) 2nd order' which is ~48 -> less than 1.2).
How did this end up?
by emmgee
Nov 05 2015 8:45am
Forum: Motor Technology
Topic: New Lebowski disciple!
Replies: 67
Views: 14902

Re: New Lebowski disciple!

Yes, I forgot to mention that, Lebowskis documents are perfectly updated. My info is only valid for the ones (like marcexec) who have the 2.30 board and would eventually use an updated chip. This is easily possible with that small modification.
by emmgee
Nov 03 2015 11:48am
Forum: Motor Technology
Topic: New Lebowski disciple!
Replies: 67
Views: 14902

Re: New Lebowski disciple!

Maybe this shows it better: 8 temp-sensors DS18S20 can be connected in series. Individual programming is possible. Very useful and nicely implemented by Lebowski!
Board_mod_for_v2_40.JPG
Board_mod_for_v2_40.JPG (140.73 KiB) Viewed 2134 times
by emmgee
Nov 03 2015 11:42am
Forum: Motor Technology
Topic: New Lebowski disciple!
Replies: 67
Views: 14902

Re: New Lebowski disciple!

Back to the topic of this thread: Here are pics of the little modification for the Lebowski-board v2.30 to be used with the Lebowski chip v2.40 (or now v2.50) with temperature control. 20151103_173444_Board_v2_30_mod_for_tempsensors_01_low.jpg 20151103_173607_Board_v2_30_mod_for_tempsensors_02_low.j...
by emmgee
Nov 03 2015 11:27am
Forum: Motor Technology
Topic: New Lebowski disciple!
Replies: 67
Views: 14902

Re: New Lebowski disciple!

Dan: The Quantya doesn't need a new controller, the Alltrax 7245 is made for up to 20 cells (84V_max). It has to be reprogrammed for the higher voltage limit, that's all. If you want to keep the original 48V main relay, a resistor (~150 Ohm) is needed for the relay coil. Similar mod for the 48V volt...
by emmgee
Sep 11 2015 9:08am
Forum: Motor Technology
Topic: New Lebowski disciple!
Replies: 67
Views: 14902

Re: New Lebowski disciple!

Marc, you will not miss anything in v2.30 compared to v2.40 besides the temperature functionality. But in my opinion this is a great improvement, because it allows a precise safety control for the important components. I soldered a 4K7 resistor and 3 wires under the PCB, will try to make a picture o...
by emmgee
Sep 09 2015 11:33am
Forum: Motor Technology
Topic: New Lebowski disciple!
Replies: 67
Views: 14902

Re: New Lebowski disciple!

Hi Marc, Unfortunately I can't mention any reasonable progress in the last few month and now I'm even more blocked with a broken hand. The good news: We have 3 brainboards ready (and waiting...), mine is fully equipped with all the drivers for 4 x 6 FETs. Lebowski sent me the ultracool V2.40 of the ...
by emmgee
Sep 09 2015 5:47am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Power for 100km/h elmoto speed
Replies: 4
Views: 854

Re: Power for 100km/h elmoto speed

Fits well with my experience and theoretical calculations for the power demand at the wheel (in kW) in this table: 2wheeler_power.JPG So for an eMoto (Enduro) with bad air drag coefficient and upright position I would predict about 9.2 kW power demand at the wheel. With eta_controller=0.95 and eta_m...
by emmgee
Jul 09 2015 7:24am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224843

Re: Lebowski's motor controller IC, schematic and setup manu

Info about prices and parts list in Excel can be found here: http://endless-sphere.com/forums/viewtopic.php?f=30&t=63572#p978868 My parts cost (board, electronics, lebowski-controllerchip) for 1 controller/powerstage was ~USD 200.- when ordering parts for 10 controllers. The info in the link is for ...
by emmgee
May 20 2015 4:48am
Forum: Motor Technology
Topic: build your very own Lebowski controller !
Replies: 376
Views: 62054

Re: build your very own Lebowski controller !

Wow Lebowski, I'm impressed! The WR250 is a nice little beast. I was electrically unfaithful too.. and had some Honda CRF250R motocross experiences last week. But - against the guilty conscience - I finally bought myself a Quantya, ready for an upgrade with a different motor than the Lynch and a 20S...
by emmgee
Mar 10 2015 9:25am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224843

Re: Lebowski's motor controller IC, schematic and setup manu

ThanX lebowski. I can't explain this low value under "recovery, q)" because we autocompleted everything after lifting the current limit. Now I really have some hope that you found the weak spot! So to avoid falling back into recovery mode we will lift this value to ~5A. Besides: - does it help when ...
by emmgee
Mar 10 2015 6:17am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224843

Re: Lebowski's motor controller IC, schematic and setup manu

controller_lebowski_230_software_150310.xls lebowski: I'm still not able (!!!) to to a hex dump, but in the annexed excel all settings are listed (column K) together with comments for most of the parameters. Also included: A visualization of menu "l) hall sensored only" with the angles reported fro...
by emmgee
Mar 09 2015 5:22am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224843

Re: Lebowski's motor controller IC, schematic and setup manu

Hi Bas, I remember that we had similar effects as Arlo shows. The motor was turning without throttle. The primitive "solution" was to re-calibrate the throttle on the low-throttle setpoint with some mm hysteresis. As you remember our setup worked quite nicely like this at low currents with the 74V p...
by emmgee
Jan 25 2015 4:24pm
Forum: Motor Technology
Topic: build your very own Lebowski controller !
Replies: 376
Views: 62054

Re: build your very own Lebowski controller !

Seeing is believing: Here 2 pics.
150117_Lebowski_230_02.JPG
brainboard and 6-FET powerstage
150117_Lebowski_230_02.JPG (140.63 KiB) Viewed 1070 times
150117_Lebowski_230_01.JPG
setup with motor and cycle analyst
150117_Lebowski_230_01.JPG (107.24 KiB) Viewed 3092 times
by emmgee
Jan 25 2015 4:10pm
Forum: Motor Technology
Topic: build your very own Lebowski controller !
Replies: 376
Views: 62054

Re: build your very own Lebowski controller !

Has anyone built one that could be touched and seen? :P Of course it exists. Following exactly Lebwoski's example, I ordered 10 PCBs at http://www.quick-teck.co.uk and tons of parts at http://www.digikey,com. And most importantly: 10 brain-chips from Lebowski. One board and controller went to marce...
by emmgee
Jan 19 2015 6:41am
Forum: Motor Technology
Topic: MOSFETS
Replies: 13
Views: 1603

Re: MOSFETS

emmgee I would say its only for the Desat detection why liveforphysics is recommending Zombiess,s gate driver which is based on the TD350. .[/quote] Thanks for the desat-tip. For the moment we stay with 500-600ns deadtime based on Lebowskis recommendation. This weekend we had the first success with ...
by emmgee
Jan 15 2015 6:02am
Forum: Motor Technology
Topic: MOSFETS
Replies: 13
Views: 1603

Re: MOSFETS

LFP, the IXYS MTI200WX75GD or even better for me the MTI145WX100GD you mentioned some month ago are really fascinating... but I never was able to find them. Futureelectronics.com doesn't have them on their website either, at least if I'm searching from Europe. Would these chips really be accessible ...
by emmgee
Dec 04 2014 7:18am
Forum: Motor Technology
Topic: New Lebowski disciple!
Replies: 67
Views: 14902

Re: New Lebowski disciple!

Sooo... it's time to declare myself as another disciple (together with some friends). - I ordered 10 boards at http://www.quick-teck.co.uk (a tip from marcexec, one board and controller will go to him) and already got them here for ~CHF 25.-/unit (equals ~USD 25.-/unit). For the order I only had to ...
by emmgee
Nov 10 2014 6:23pm
Forum: Motor Technology
Topic: Lebowski controller build possible IPM output stage
Replies: 98
Views: 13552

Re: Lebowski controller build possible IPM output stage

Very nice, thanks Chris! The tip for such complete and cheap resistor kits is also very useful, better than ordering single resistors.
Cheers, Marcel
by emmgee
Nov 07 2014 9:45am
Forum: Motor Technology
Topic: Lebowski controller build possible IPM output stage
Replies: 98
Views: 13552

Re: Lebowski controller build possible IPM output stage

Hi Purple_Jeep Did you finish the controller? Is it running? Are Bluefang and you happy? It would be very kind of you to publish the complete BOM list with all the digikey part numbers here. Lebowski's original controller.csv contains the important parts, but not the little things as resistors and c...
by emmgee
Nov 06 2014 8:53am
Forum: Large EV General Discussion
Topic: 0 - 60 in under 2 seconds
Replies: 27
Views: 7237

Re: 0 - 60 in under 2 seconds

My favorite parts in this incredible vehicle: The four in-wheel motors. [img] AMZ_motor_37kW.jpg [/img] Each motor delivers 37kW/50HP peak, but weighs only 3.4kg. Connected to a planetary 'gearbox' which takes the forces from the suspension. Excellent electromagnetic design and highest quality compo...