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Old 09-08-2013, 08:30 AM   #1 (permalink)
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YAMAHA Byson EV-X (Conversion - WIP)

A US$2200 donor bike

Here's what I had in mind :

1.Strip off everything (I don't need)
2.Salvage Magneto housing, half dipped coupling and gearbox
3.Redesign and make prototype of the gearbox housing
4.Integrate AC 3phase motor to gearbox & water jackets
5.Re-Design the flywheel (magneto housing)
6.Fibreglass/carbon fibre housing for electronics
7.Liquid cool everything
8.Ultracapacitors as charging buffers?

I had access to CNC machine and aluminum casting dept, that's why I decide to make my own motor & batteries mounting rather than welding some steel bars to the frame.

I was thinking about vehicle range up to 200km and top speed of about 96km/h (that's about 124mile, and 60mp/h)

I stumbled upon Heins Regenx on youtube, impressive demo, but no info on it, probably a hoax or something, the idea is sound (from my R&D point of view) of increasing motor effectiveness (low input big output), going to ask about this to those EE degree friends of mine.

So anyways I'm just starting this project few months ago, and I got plenty of research and designing to do.

So if there's anything you might wan't to add or some questions (and maybe critics) feel free to hop right in.

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Old 09-13-2013, 08:08 PM   #2 (permalink)
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Always lots to learn on such a project. Regen braking is a help both in braking and energy saving especially in city riding. Ultracapacitors can be useful and less expensive than additional batteries while being part of the frame. Switching between parallel battery and series connections as part of the controller program could help match available current to motor demand especially at low speeds. Look at the gains from streamlining for more range. See craigvetter.com for info.
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Old 09-14-2013, 07:20 PM   #3 (permalink)
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la_voiture_de_courses - '03 Renault Megane Estate
OldContinents
90 day: 44.34 mpg (US)

xiao lan - '01 Audi A2
90 day: 38.88 mpg (US)

Brit iron - '92 Mini Mini
90 day: 45.5 mpg (US)

Prius - '09 Toyota PRIUS Lounge
90 day: 47.37 mpg (US)

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The bike is nice, why don't you get a 400$ tired bike and use the 1800$ extra to buy those expensive batteries just to prove the validity of the concept and then retrofit it on a nicer bike ?

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