Search found 80 matches

by emmgee
Dec 06 2019 6:15am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1634
Views: 203943

Re: Thread for new battery breakthrough PR releases

Interesting paper... looks scientifically sound and the authors from UIC, Argonne and Purdue are credible. Swagelock cells have been built and tested based on theoretical calculations of the novel ingredients (Li as anode, CO2 as cathode with MoS2 as catalyst and a ionic liquid/dimethyl sulfoxide el...
by emmgee
Nov 20 2019 6:09am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 402
Views: 71269

Re: Axiom: a 100kW+ motor controller

The Axiom part starts at 13:15 in the video. Soooo good to see you together on the stage, deep respect and congrats!
by emmgee
Oct 14 2019 4:09am
Forum: Items for Sale - New
Topic: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD
Replies: 109
Views: 14515

Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Interesting... 3M produces a "Thermally Conductive Silicone Interface Pad 5586" (sold e.g. by Mouser) 210x155x2mm which could do the job. Thanks for the tips!
by emmgee
Oct 11 2019 4:58am
Forum: Items for Sale - New
Topic: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD
Replies: 109
Views: 14515

Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Throwing in the Goldenmotor hubmotor (large diameter model) with&w/o internal controller: I measured the circumference with a wire (903mm) and calculated the diameter -> 287.4mm. Width between flanges, flat part without radius: 16mm max, so perfect for 1x 15mm ring of hubsinks. Magnet width: 19mm, d...
by emmgee
Sep 26 2019 7:15am
Forum: E-Bike General Discussion
Topic: two way throttle? (thumb or twist)
Replies: 14
Views: 461

Re: two way throttle? (thumb or twist)

Since I tested a Vectrix eScooter with a two way throttle years ago I also want such a thing on my vehicles. Couldn't find it yet... #15 in your link looks good, but they don't give specs (2 x hall 1-4V would be nice) and say it's only designed for their own system.
by emmgee
Aug 19 2019 5:03am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 577
Views: 94647

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

Some time in a hopefully not too far future it would be amazing to see Lebowski's OR Axiom's software running on the Axiom hardware (all open source), so that a direct comparison with mutual learning effects would be possible. Something like the battle of the titans!
by emmgee
Jul 18 2019 10:33am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 577
Views: 94647

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

:wink: yeah, it's a bit like foreplay for people with - hmmmm.... - special preferences.
by emmgee
Jul 16 2019 3:04am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 577
Views: 94647

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

Cool to see things moving on! But now you leave us curious with many questions... :wink:
A new CRX? Same mods as for the black one, with Leaf motor? Powerdesigns controller instead of Lebowski/Arlo? Even more oompf?
Looking forward to the answers!
by emmgee
Mar 08 2019 4:36am
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 224
Views: 18513

Re: Revolt RV-series motor review and comparisons

Let's not forget that we're all brothers in arms, fighting for the same interests and not against each other. I'm learning a ton from all of you, despite of (or thanks to) different approaches. Thanks a lot ElectricGod, Larsb, John, neptronix etc.etc.etc.! Let's give revolt a chance to prove that th...
by emmgee
Dec 14 2018 8:13am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 79
Views: 8418

Re: Sensorless at standstill, development updates and status

Maybe not a Zero, but something similar... in the meantime we have 2 Quantya's sitting around unused with broken DC-Controllers and I would be happy to bring you one (street legal) for experimenting as long as you want. For the motor I'm thinking about buying a Revolt RV-160Es, not a monster (~20kWp...
by emmgee
Dec 14 2018 6:08am
Forum: Motor Technology
Topic: DLD and DCF files for LEM 200 - D127 with SEVCON Gen4 DC
Replies: 2
Views: 411

Re: DLD and DCF files for LEM 200 - D127 with SEVCON Gen4 DC

Hi, just stumbled over this un-answered question because I have the same Lynch-motors... which are DC motors with brushes and as far as I know all the Sevcon Gen4 are AC-controllers. This pair will never work, sorry...
by emmgee
Dec 13 2018 12:06pm
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 79
Views: 8418

Re: Sensorless at standstill, development updates and status

Don't give up Lebowski, please.... it's a pleasure to follow you over all the years, and I finally had some progress after updating to version 2.A1 (well, it just blew up again recently, but every time I try to learn from my mistakes...). Just a thought: Maxon Motors in Switzerland is producing tiny...
by emmgee
Jul 13 2018 10:56am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 201
Views: 20878

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

I was soooo close, but now there's dispair: The power PCB is ready and I connected the processor board. On 35V from the lab power supply the 15V and 5V LEDs were first flickering. I installed 2x270ohm resistors for R1 (540ohm) to lower the voltage to the brainboard, so I had only about 18V as supply...
by emmgee
Jul 09 2018 10:40am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 201
Views: 20878

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

A good disconnection including a spark prevention would really be nice, I tried to find what is around in the Sphere and found Fechters and Methods designs. My proposal based on their knowledge is: BatterySwitch_FechterVedder.JPG It includes a connection to Justins Cycle Analyst. Hope that this will...
by emmgee
Jul 03 2018 3:09am
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 79
Views: 8418

Re: Sensorless at standstill, development updates and status

I wish I knew so much about physics, electronics etc. to push things further than global companies like Texas Instruments are capable.
Just fyi: I stumbled across a video explaining the TI Instaspin technology, I think I haven't seen it on the forum yet: https://youtu.be/szgVUfyX8JM
by emmgee
Jul 02 2018 3:49am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 377
Views: 50437

Re: Suzuki GSX-R e899 K2

Hmm, DC motors, I don't know.... part of the fun of following your work is that it's NOT DC. There are spectacular examples how far you can get with plasma-spitting monsters, so why repeat what others have already demonstrated in perfection? I personally want to get rid of my Lynch motors, because I...
by emmgee
Jun 28 2018 1:35am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 377
Views: 50437

Re: Suzuki GSX-R e899 K2

Well... of course this is frustrating, but better the motor than the controller! I was surprised what the hubbie could take up to now and I wonder what your motor choice will be. Rock on Rovii :twisted: !
by emmgee
Jun 25 2018 3:23am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 201
Views: 20878

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

I need your opinion... the controllers I know have an "enable" function, which is a battery voltage input to the controller which can be switched on and off with any type of device (keyswitch, kill switch, rip cord, ...). The main battery line is not interrupted, just the brain is switched off which...
by emmgee
Jun 21 2018 4:43am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 201
Views: 20878

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Sorry for the confusion, on course just one resistor with the right wattage would be the simplest (for 20S: 470 Ohm 2W (1.18W dissipation)). I was just hoping to find standard 0.5W resistors I could combine. Stupid problem: If I order single resistors in an online shop, this costs a lot considering ...
by emmgee
Jun 20 2018 11:41am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 201
Views: 20878

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

3.1 l/100km, not bad indeed for a retro-technology I'm also still using (4 l/100km with BMW F800S) :wink: . But back to the future... The choice of R1 on the Power PCB is much more sensitive to the battery voltage than I first thought. Protect the processor-board from high voltage (how much is accep...
by emmgee
Jun 19 2018 11:47am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 201
Views: 20878

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Thanks a lot bas, this is very helpful for all the builders and whereswally's cool kit.
So this looks like a 1kOhm 0.5W resistor for R1 (or 2 x 2kOhm 0.25W in parallel) for a 20S 84V setup, 220 Ohm is definitely not enough.
I replaced the needed 39kOhm for R2 instead of the 39Ohm in the kit.
by emmgee
Jun 18 2018 11:36am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 201
Views: 20878

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Progress! After about 16 hours I'm seeing light. Hoping so much that I didn't overheat stuff and I'm thinking about how to test it before applying juice. IMG_20180617_180532_lo600.jpg IMG_20180617_184056_lo600.jpg Important remarks: R1: According to lebowskis video one page back this resistor ("tbd"...
by emmgee
Jun 12 2018 10:46am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1794
Views: 208269

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

Thats real world science fiction, better than ..?.!... (fill in whatever you like :mrgreen: )
by emmgee
Jun 05 2018 2:50am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 201
Views: 20878

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

I got the nicely prepared kit for the power PCB from whereswally and a pimped brain PCB from lebowski. This brain is so tiny... almost the size of a post stamp. Now there's quite some work to do until it will be ready to be installed, here's my progress: The kit: IMG_20180602_154326_lo600.jpg The ti...
by emmgee
May 30 2018 1:57am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 201
Views: 20878

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

I just got my power-PCB kit as well, nicely packed with marked components. Happy! Now I have to reserve time for the assembly and a solution for the MOSFET cooling has to be found. Looks like an 'L' Alu-bar with a thickness of 5mm and a length of ~77mm would be ideal, 25-35mm wide on the FET side an...