Justin's Introduction to Ebike Conversion Kits, filmed live at 2019 BC Bike Show
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- Опубліковано 6 сер 2024
- This is a presentation we delivered at the 2019 BC bike show in order to provide a basic primer on electric bicycle conversion kits, and how to select among the myriad of options what would be appropriate motor/battery choices for a given application.
It's a long talk so here are some quick links to different sections
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*Why convert a bike over turn-key ebikes? • Justin's Introduction ...
*The 4 broad categories of retrofit kits: • Justin's Introduction ...
-Small Geared Hub Motors: • Justin's Introduction ...
-Large Geared Hub Motors: • Justin's Introduction ...
-Direct Drive Hub Motors: • Justin's Introduction ...
-Mid-drive Motors: • Justin's Introduction ...
*Front vs Rear Hub Motors: • Justin's Introduction ...
*Caution wiht Motor Power Ratings: • Justin's Introduction ...
*Examples of Bike Conversions: • Justin's Introduction ...
*Common Ebike Myths: • Justin's Introduction ...
*Understanding Battery Options: • Justin's Introduction ...
*Additional Notes about Lithium Batteries: • Justin's Introduction ... - Наука та технологія
Justin is an awesome guy. he did so much for the E-bike community (worldwide) since the early days. Grin Tech keeps inventing, educating and sharing.
people should know, he saved "Endless Sphere" online community (biggest E-forum on the planet) from disappearing.
Early days! He's a child
I'm curious. How so?
This guy knows his stuff! Thanks Justin and Grin!
Fantastic talk!
super informative, and a great overview to broaden what's out there
Glad this up, had I looked at presentations online before going I would have gotten there earlier to see this
Its easy, I fitted my kit 5 year's ago now, best thing I ever bought,250w minimal /geared front hub motor, now I have a 42v 15ah lion BATTERY she's perfect.Its a trip cruising around on an Ebike I love it ,especially crossing grass field's like it's tarmac 😎🙋♂️
Thanks Justin, outstanding presentation, very easy to understand. Have shared lots to My friends. Thanks again buddy
Great talk!!! Thank you for sharing
Excellent presentation. Thanks so much for sharing.
I was there i saw the presentation it was awesome
A beautiful introduction to E bike conversions, Thanks GT.
Justin and his company Grin Tech - one of the best addresses in the whole market for e-bike stuff.
He really knows what he is talking about.
A very good speech and presentation. Very informative. Answers many questions.
The best are after all conversion kits with the right parts. Everything else is too much compromise. Nobody wants a weak motor or a battery that is not lasting long enough.
Great Video. Very informative.
This was 2years ago... But still relevant today
Liked the video. Good one.
Well rounded e-bike primer.
DIY is great for getting exactly what you need with high quality components. Pre-assembled is good for adequate performance turn-key solution, but check replacement costs of proprietary Bosch/Yamaha batteries. They are close to double the cost of a good DIY battery from Grin, Luna, or EM3ev.
I love this,, thank you
EXCELLENT !!!
I agree that re-gen braking with hub motors is awesome and hub motor setups essentially get it "for free". The amps flow that e-braking can generate continually astonishes me.
The only one down side to e-braking I have encountered is many e-bike ESCs have jerky "all-or-none" e-braking which can make the e-braking a bit jarring to the rider. The ESC could implement a PWM amp "ramp up" to make the e-brake activation a bit smoother so the user can still get max return amps. The best way is to feed in proportional braking signal to the PWM e-brake controller and allow the user to modulate the e-brake just like a regular caliper or piston brake. But most e-bike grade controllers do *not* have that feature though. I'm pretty sure commercial electric cars and motorcycles have it.
Some newer bikes address this very well. My Stromer ST2S has 5 levels of re-gen that can be shifted on the fly. For instance, pushing on the MINUS key initiates re-gen, and each additional push increases the level. You can start down a hill, and as it gets steeper, just keep increasing levels. Push and hold the PLUS key and it cancels. As for brake activated re-gen, there is a user program where you can customize the amount of "attack", from barely noticeable, to very aggressive. As the attack is fairly linear with the braking force applied, I keep mine at max. It is very controllable.
You can also adjust the pedal, speed, torque, and agility sensors, making the bike seem to anticipate your every move. This is aided by the bike also having an inclination sensor, and customizing all of the above further based on whether you are going down hill, up hill, or on a flat. It is truly amazing compared to the other assist levels, or my other bikes that use just torque, cadence, and speed sensors.
I suspect we will be seeing more and more of these advancements in the very near future.
Yeah, it shouldn't take too long for even generic controllers to start 'coming of age' in terms of how they handle regen. We ensured many years ago that our entry level Grinfineon controllers have the means for smooth proportional regen via a 0.0-0.8V throttle signal range, and higher end controllers like the Phaserunner (or just about any other properly engineered EV motor controller) allow for smooth proportional and programmable regen control.
Can't wait to built a direct drive rear hub setup :)
Nice presentation. Also love your simulations on ebike.ca. Greetings from Istanbul
Hey Thanks! We almost went to Istanbul on our 2018 suntrip solar bike ride through turkey but were advised that it's a little too crowded of a city for that. Some day we would love to visit.
@@GrinTechnologies Yes istanbul is way too crowded to ride solar bikes :)) We also do e-bike conversions in Istanbul. We would love to meet with you some day in future!
I run a Bafang G06 rear geared hub, pushing over 2000W peak, fitted to a mtb, never had a gear failure in 3 years, even crashing over rock beds under full power.
Justin.. Which bike locks do you like for ebikes..? And why..? Thanks. I appreciate your expertise and knowledge.
Rock on! Best kit seller ever. Almost true!
5 🌟🌟🌟🌟🌟 Presentation !
Well Done
What about a delta recumbent with the two wheels in the rear and one upfront? And with 20" wheels.
In that case you'd simply use a front hub motor, very easy.
This lockdown got me browsing new projects. Feeling an Ebike build coming on and the products these lads/lasses offer seem to get good rep and comparative pricing. Wonder what the UK shipping etc would sting me for?
I've been using my alfine 8 with my bbs02 for a few years no problems. But I'm always careful not to throttle and change gears at the same time.
That's good to hear, we destroyed an Alfine 8 just pedaling with no mid-drive motor on a bike touring trip so my confidence in that model was really shaken. But I we should be seeing more and more IGH models that are engineered to cope with a well adjusted mid-motor OK, so over time this point about mid-drives + IGH should become less valid.
Mr. Seller. Doesn't this hub motor really have flaws? Only advantages? I'm trying to figure out if this geared hub will be ok for mountain trips with lots of downhills - meaning a LOT of regenerative breaking. Regenerative braking means HEAT in the motors windings. Meaning ADDITIONAL HEAT after i generetad a LOT OF HEAT while climbing up the hill. It also means additional heat in battery pack. Is there any means to control the amount of current going back to the battery pack during regenerative braking to not exceed the charging current? People using geared hub motors used to block one way cluch to enable regererative braking (like in your product) found it is easy to overheat the motor and easy to melt the planetary gears. Do you use plastic or metal set of gears? How about overheating issues? All the vids i saw regarding gmac motors are telling how fantastic they are and i haven't seen a single real life test in mountains...
I think you're commenting on the wrong video here (this is a general intro to conversion kit options, and makes no mention of the GMAC). But that said, yes doing regen means that the motor and controller won't have as much cooling opportunity compared to having a hub freewheel when going downhill. Since any motors that we sell with regen also have a built-in temperature sensor you can use the V3 Cycle Analyst to monitor the motor temperature and automatically scale power back if things are overheating. The actual overheating conditions are very well modeled on our trip simulator tool here if you want to play around with it,
www.ebikes.ca/tools/trip-simulator.html?m=GMAC10T&v=mountain&ms=100&h=100&w=26&sp=40&wv=0&b=B4823_AC&c=C20&rg=true&t=21&ct=21&st=21&i=man&p=16A08862FH9M&mo=&md=&x=&y=&lx=544&rx=NaN&rw=NaN
You can check and uncheck the "regen enabled" button to see the difference after drawing your example elevation profile.
Excellent talk Justin. I find that we should have the technology to easily have 50ah and a riding range of at least 200 miles. We are so oppressed with technology nowadays it makes me sick. Nano carbon should be the future at least to this degree or something better that self charges without plugging into the grid whatsoever. Anybody check out Bedinis SSG and possibly how this could be implemented into an e bike design?
ok went to the site which kit is the most powerfull?
DD45
Re-stock the Phaserunner! Pleeeease! 😁
13:07 breaks alternative
Or carry battery in back pack with magnet plug from lunacycle.com. Grin (he has youtube on this) makes single sided mono-blade front fork e-motor. Yay! That’s incredible
To some this is nerdy stuff. To me however, I love it. I already know most of this information but when I try and explain what I'm doing to other's. Well let's just say I have zero patients.
What is your phone number there please so I can give you a call and talk to you about some of those geared rear hub motors?… The Maxx Thank you in advance!
Hi sir my god u
The only person I think could do an ebike conversion kit is Elon Musk!