Search found 841 matches

by Ohbse
Jan 13 2020 8:29pm
Forum: General Discussion
Topic: What's with this censoring nonsense happening on the forum?
Replies: 151
Views: 12762

Re: What's with this censoring nonsense happening on the forum?

Let me throw in my complete agreement with the sentiment from John, larsb and others. I've attempted to not let this get under my skin, but as another example of a good thread gone bad - My Mobipus controller discussion completely turned to crap and was unceremoniously locked without comment over a ...
by Ohbse
Jan 05 2020 5:21pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: High voltage controller
Replies: 12
Views: 871

Re: High voltage controller

What weight/power is this bike designed to? If it's a lightweight 'bicycle' type build, then voltage >100v is unneccessary and undesirable, as more than enough performance is possible with ~80v than is possible to keep on the ground. If you're referring to a full size motorcycle build, then addition...
by Ohbse
Jan 05 2020 5:04pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1234
Views: 128797

Re: Nucular electronics - complete kit for ev! [beta]

What is the achievable stall current (at zero rpm, locked motor / standstill) with the Nucular 12 and 24fet? I am asking since this really is a key performance factor for the hotrodding people. I'm pretty sure you can play around with the settings related to the "clutch" function to achieve launche...
by Ohbse
Jan 04 2020 10:55pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1234
Views: 128797

Re: Nucular electronics - complete kit for ev! [beta]

Ohbse, did you order your 24Fet controller specifically to fit inside Sur-Ron controller? Was there any issues with gutting the Sur-ron stock controller? What do you mean trimming back the plastic pieces? Would you be able to put back your sur-ron original controller in the sur-ron housing if you n...
by Ohbse
Jan 04 2020 6:39pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1234
Views: 128797

Re: Nucular electronics - complete kit for ev! [beta]

Keep things civil please. That's what I would prefer too. There's zero point in deliberately undermining people. No point in it at all...giant waste of everyone's time. IMHO...it's completely unproductive in every way. And yet there is a point - you were mistaken, it was explained why you were mist...
by Ohbse
Dec 22 2019 4:47am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1234
Views: 128797

Re: Nucular electronics - complete kit for ev! [beta]

Vasili is currently developing a bms 24s so I think that Nuculars electronics controllers are ready to accept this voltage. Maybe you will need to update the firmware. The 24s is for other chemistries with lower voltage such as lifepo4. Definitely would not recommend going above 20 or 21s, as EG sa...
by Ohbse
Dec 16 2019 2:25am
Forum: E-Bike Non-hub Motor Drives
Topic: SURRON LB: RESEARCH & DEVELOPEMENT
Replies: 211
Views: 27277

Re: SURRON LB: RESEARCH & DEVELOPEMENT

Agreed the rating on that pack is extremely dubious. I've built a lot of 30q packs and would never specify a 10p pack as 200a continuous. With that topology and density I suspect it would get pretty toasty at half that. 20a single cell discharge in free air gets to 80c before it's done. In other new...
by Ohbse
Dec 16 2019 1:08am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Sur ron Road Version Max Speed
Replies: 8
Views: 1560

Re: Sur ron Road Version Max Speed

Not relevant to your original question - but the speedo calibration on the road legal surron is highly optimistic. You can actually alter the speedo ratio on the display and correct the speed by powering on the bike while holding one of the buttons on the display. I've changed mine from 1.0:1 to 1.1...
by Ohbse
Dec 14 2019 10:02pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Mid-mount Hubmonster Madass
Replies: 80
Views: 20399

Re: Mid-mount Hubmonster Madass

Nope - because I still haven't progressed this project any further than my last post.

Instead I bought a Surron l1e and got it road legal, now I'm modifying that instead.

I still want to do the Madass - but that's going to have to wait until I've built a new workshop.
by Ohbse
Sep 23 2019 1:30pm
Forum: EV Business World
Topic: Tesla Model 3
Replies: 1144
Views: 96649

Re: Tesla Model 3

? Are you suggesting they never ran a full lap ? But they just spent several days there running laps with the stated intention of setting a time. So why no time posted ? Not even an “unofficial” time ? They were happy to post a time for Laguna At least they qualified for the “Bongard” club. ! No ti...
by Ohbse
Sep 19 2019 4:44pm
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 40
Views: 4757

Re: Taycan video with some useful information

Based on my experience and research on battery thermal management, Tesla has done a very good job with the system they are working with, but it is by no means the best. It has been optimised for the task (driving a 2 ton saloon car down the road a long way) and it does that very well. But more supe...
by Ohbse
Sep 19 2019 5:09am
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 40
Views: 4757

Re: Taycan video with some useful information

But we know the “S”has always had an issue with thermal build up in their pack (and the motor.) Those issues are magnified at higher power levels (amps !) Induction motors are capable of huge burst power but have inherent thermal limitations with rotor cooling, the model S is a well optimised syste...
by Ohbse
Sep 19 2019 3:37am
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 40
Views: 4757

Re: Taycan video with some useful information

It's possible there are thermal advantages from the higher voltage relative to other inverter tech available to Porsche but it can't be assumed.. generally higher voltage capable silicon has a proportional increase in resistance. There are 'sweet spots' where system efficiency peaks and perhaps 800v...
by Ohbse
Sep 18 2019 4:40pm
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 40
Views: 4757

Re: Taycan video with some useful information

A great article with some very interesting details. Standout for me is the large number of additional components when compared to the Tesla drivetrain. In particular comparing Taycan to the construction of the Model 3 there's a lot of additional complexity. The transmission, multi plate clutch, actu...
by Ohbse
Aug 25 2019 11:17pm
Forum: E-Vehicles General Discussion
Topic: Battery dilemma - Voltage
Replies: 7
Views: 1050

Re: Battery dilemma - Voltage

Unless you have a controller with >100v rating, then moving to 24s will most likely end in disappointment with a fried controller. There are many tales of people getting away with it for a period of time in the pursuit of peak performance, but that's not really relevant any more in this age of more ...
by Ohbse
Aug 19 2019 10:58pm
Forum: E-Bike Technical
Topic: Oil cooling your hub- NOT snake oil!
Replies: 608
Views: 113298

Re: Oil cooling your hub- NOT snake oil!

It's been 2.5 years since i posted that little blurb on sealing your hub.. for anybody new to this now, much has changed - just go buy some statorade and enjoy the same result with no mess!
by Ohbse
Aug 13 2019 8:27pm
Forum: Motor Technology
Topic: Legit electric motor technology breakthrough?
Replies: 19
Views: 2383

Re: Legit electric motor technology breakthrough?

Pretty obvious from their videos and marketing materials that their initial market will be "upscale" -- i.e. military, industrial, aeronautics, and certain construction technologies where there would be a premium for fail-safe operation. I can't see them moving downscale anytime soon. First product...
by Ohbse
May 29 2019 9:28pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Lightweight Retro Electric Motorcycle Design
Replies: 5
Views: 993

Re: Lightweight Retro Electric Motorcycle Design

My long term around town average energy consumption is about 52wh/mile over the past 20,000km. That's rapid acceleration, 35-40 mph cruise, bike weight of 42kg, QA v3 in 17" rim, 18650 pack, 20s 36ah from Samsung 30q cells. Top speed is >70mph. Power peak is around 12kw in daily ridden form. I weigh...
by Ohbse
May 02 2019 5:18pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: I blew up ANOTHER controller
Replies: 7
Views: 787

Re: I blew up ANOTHER controller

Root cause is Kelly are rubbish, I feel like we need a sticky at the top of the board with a PSA about their issues. Random detonations are par for the course unfortunately... People luck out and get one that won't explode and post positively about the experience, but unfortunately there are a lot m...
by Ohbse
Apr 28 2019 9:21pm
Forum: Items for Sale - Used
Topic: mobipus voltage
Replies: 9
Views: 782

Re: mobipus voltage

I started off with 20s, now I'm running 18s. Obviously higher voltage is going to offer potentially better performance, but in practice you're much more likely to hit some kind of protection as you'll be close to the FET maximums with 22s. Personally I would go with 20S and re-package the pack to ha...
by Ohbse
Apr 16 2019 7:34pm
Forum: Motor Technology
Topic: Choosing the right controller for QS205
Replies: 4
Views: 522

Re: Choosing the right controller for QS205

Build sounds good, you'll definitely have fun :thumb: What size wheels are you intending on? Here's the summary of most of the existing options: Kelly - Junk performance, Junk reliability Adaptto - Inconsistent performance, hate QS v3 hubs, junk reliability, literally can't buy them if you wanted to...
by Ohbse
Apr 12 2019 10:19pm
Forum: E-Bike Technical
Topic: Recommended Soldering Iron for 5AWG?
Replies: 11
Views: 890

Re: Recommended Soldering Iron for 5AWG?

Best soldering iron for wiring that size is no soldering iron, it's just not the right technique for connections at that scale.

Best option is to invest in a hydraulic crimper - they can be had pretty cheaply from ebay etc. I love mine.
by Ohbse
Apr 09 2019 6:29pm
Forum: E-Bike General Discussion
Topic: 21kw+ QS273 won't outrun a 250cc?
Replies: 38
Views: 2461

Re: 21kw+ QS273 won't outrun a 250cc?

mobipus 72200, asi bac8000 controllers i suspect will give better results(just from trawling,not personal experience yet) me i like smaller light bikes with good power/weight ratio over big heavy tanks...going over 100 on highway gets boring fast anyway. id be maybe ditching the kelly, changing bat...
by Ohbse
Apr 09 2019 5:18pm
Forum: Stand-up E-scooters and E-skateboards
Topic: I fear no man. But that ...thing. it scares me.( Thunder dual motor).
Replies: 11
Views: 1739

Re: I fear no man. But that ...thing. it scares me.( Thunder dual motor).

I rode one of these a couple of weeks ago - I know what you mean with regards to throttle response, it's pretty wild/non-linear. This thing would be SO much better with decent quality controllers with proper torque throttle. Dual Nucular 12fet would be ideal. My other observation was that with the d...
by Ohbse
Apr 01 2019 11:01pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Scratch built 33" Kicktail Monocoque longboard
Replies: 11
Views: 1431

Re: Scratch built 33" Kicktail Monocoque longboard

Wow that looks good with the glossy varnish finish. Nicely done! I like the idea of having your cover held on by magnets, so convenient. And because its so convenient, completely removes the need for externally mounted power button, charge port, ect. Could always install some kind of retaining brac...