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View Full Version : timr for a new project sakura electric bike(moped)to trike



markc
06-10-2014, 04:43 PM
this is the new one i am currently building its for my wife she said she wanted the sakura electric bike converting to a trike so she could use the pedals if she wanted to as the pedals were not usable she said she would also feel safer on a trike but didnt want one as low as my hand cycle .so after alot of thought we decided on thishttp://s26.postimg.org/s3xyui2yx/IMG_20140610_00484.jpgit caused a few headaches to get this wheel fitted in but i got there in the end.http://s26.postimg.org/xte7et955/IMG_20140610_00487.jpgi am trying to work out the way of connecting the front to the back i wasnt sure weather it would work but it seems too(well so far)http://s26.postimg.org/qeovmfn9l/IMG_20140610_00491.jpgits not the back end im using but it does have a good centre line ,thats why i kept it so far no welding has been done i use self tapping screws to get things exactly right it saves on having to keep removing spot welds when the wifes happy with the bottom frame work i will then sort the seat out and go from there the only thing were unsure of is all the information we have managed to get on the sakura electric bike says its 36 volts but in the battery box it has 48volts so i think i will try it on 36 volts first and see how i get on

Twinkle
06-10-2014, 05:19 PM
Interesting concept Mark.

motor is a 36v and may overrun illegally to 48v
depends if it is a 2wire brushed or 3 wire brushless motor
it depends on the controller and the low voltage cutout
pm me of you need a " hand "
regards Emma

markc
06-11-2014, 03:03 PM
the wheel has a brushless motor in t it has the standard 3 wires for the moor and another connector block that go into the wheel with either 4 or 5wires on it (I will take a picture tomorrow ) to how what I mean it will be easier

Twinkle
06-11-2014, 03:21 PM
Hi Mark

its a brushless motor the extra connector is for the hall effect control signals
some of these scooters were 48 volt .
the motor would run on either 36 or 48 volts the problem would be the low voltage cut out built into the controller a 48v controller has a cutout voltage of 42v and thus it wont start on 36 volts .

regards Emma

stormbird
06-12-2014, 02:24 AM
Mark

Looking good , the pedal position has been used be for on the Flo'Roller designed by Rohorn so should work , although I am not sure what works best for the geometry :-

http://bikerodnkustom3.homestead.com/files/img18a.jpg

There have been trike versions built IIRC one was a conversion as the bike was found difficult to ride , that may just have been someone not prepared for the learning curve.

If you PM me an email address I can send you the plans and a few pictures of the bike and trike if that helps ? although to be honest you seem quite capable of ploughing you own furrow :jester: in a very impressive way.

Good luck with the build.

markc
06-14-2014, 03:17 PM
just a bit of a update managed to get a little while in the shed between moving our daughter and puppy watching yesterday i spotted a possible weak spot on the frame so moved the cross bar and extended ithttp://s26.postimg.org/hdt6b5zt5/IMG_20140614_00494.jpgi prefer it like this and hopefully the frame will be strongerhttp://s26.postimg.org/fxd2fa7ih/IMG_20140614_00493.jpgi decided today to clean most of the frame today ready for finishing then got bored and decided to put the handlebars on and prop the seat up http://s26.postimg.org/l7i16krrd/IMG_20140614_00492.jpgforgive the mess but a freind was also using my tools as he forgot his.the picture is not that clear but hopefully you can see what im hoping to achieve