DIY Electric Car Forums banner

1 - 20 of 27 Posts

·
Registered
Joined
·
18 Posts
Discussion Starter #1 (Edited)
So I am building for the second time a bike that, quite frankly might be the death of me. The heart and soul of it consists of
30, 20Ah A123 Prismatic pouch cells. The arrangement goes like this, 1/4 inch plate of aluminum with 4, 1/4 inch lengths of all thread shafts covered buy pvc tubeing. then a single cell followed by a .030 plate of aluminum then another cell and so on. On every sheet of .030 aluminum there is a 1/4 inch long 90° bend to be attached to the heat sink via thermal transfer adhesive. Truth be told this will be the second time that I will build this bike. My biggest concern is that the hub for conventional pedaled bike will not cope with the transmission of 30 horsepower.
It's kinda terrifying when you feel things come loose, at speed.
 

Attachments

·
Registered
Joined
·
18 Posts
Discussion Starter #2
Alright!!!!!! So I should probably tell all of (the people willing to listen) that I am building something of My dreams. If any of you could imagine...... the front end of a YZ80 from the 90''s with the same type of rear suspension the (link type).
More to come!
 

·
Registered
Joined
·
196 Posts
A heavy battery and 30hp in a cheap mountainbike that uses V-brakes? You're going to break something eventually.
 

·
Registered
Joined
·
18 Posts
Discussion Starter #4
The frame was actually a 1972 TC125 than I got the steering tube from a mountain bike along with its front rim brake. So yes I am sure that it would've broken.
But I am in the process of building it once more! More to come
 

Attachments

·
Registered
Joined
·
18 Posts
Discussion Starter #7
Finally got some work dun.... till next time
I am also working on a IGBT Chopper based motor controller. .. till next time
 

Attachments

·
Registered
Joined
·
29 Posts
Can I borrow that topic......

Which e motor would you suggested me,for a convert a Maxi scooter (Burgman, Piaggio x9, etc) to e power? Around 20-25kW, not too heavy, powerful enough for Highway commuting! I already have a battery pack of Panasonic cell 4.2V (72V61Ah)!
What to do with OEM variator and belt transfer power....keep it or? It’s in one piece with rear swing arm.

Thanks, looking forward to your reply and suggestions
 

·
Registered
Joined
·
18 Posts
Discussion Starter #15
I believe that is called a CVT (continuously variable transmission). That being said, there are some pros and cons with that style of transmission. Now
This is just my view on that kind of transmission. I am sure that there more than the two types that, but will talk about the two types that I have worked with.
Belt and chain, The belt kind tends to slip which generates Heat if the belt is not sealed from the elements and gets wet, the problem is exacerbated. The chain type that I have seen is mainly used are in car's and have a steel chain.
 

·
Registered
Joined
·
5,235 Posts
I don’t have a donor motorbike yet. First have to see if it possible to make everything.

The system is like that.....
https://youtu.be/oQczm1IPLv4
I believe that is called a CVT (continuously variable transmission). That being said, there are some pros and cons with that style of transmission. Now
This is just my view on that kind of transmission. I am sure that there more than the two types that, but will talk about the two types that I have worked with.
Belt and chain, The belt kind tends to slip which generates Heat if the belt is not sealed from the elements and gets wet, the problem is exacerbated. The chain type that I have seen is mainly used are in car's and have a steel chain.
Yes, that's a CVT of the most common type, with variable-diameter pulleys and a belt. Strangely to me, the rear pulley diameter is the one which is controlled, unlike a typical snowmobile CVT.

Like most scooters, this transmission is enclosed, eliminating problems with water and road dirt.

The belt and variable pulleys could be replaced with a different belt and plain pulleys to provide a more efficient drive system, but stuck at one fixed ratio, if desired for use with an electric motor. The motor would presumably be mounted where the engine currently is, not in this CVT housing; however, the motor could possibly be mounted at the front end, sticking out of the housing.
 

·
Registered
Joined
·
18 Posts
Discussion Starter #17
well I glad that you are more educated than most. (not necessarily here on this form) in my experience I have found that the torque generated from practically 0 rpm to max rpm, Is the most useful part of a DC motor. I have also learned through trial and error that if you gear said bike too low it is practically useless and a little too touchy. (the problem is only horribly evidence when you fly over the handlebars) I have chosen my bike to have a maximum speed of 81 MPH, so at around 45 the motor RPM is 2000 which is typically where do most of the cruising in and around town in an attempt to utilize the torque that a DC motor is capable of providing. In my opinion gear your bike/scooter to half of the max RPM @ your Target cruising speed. Try out this gear calculator. I am sure that you are aware that entire purpose of a transmission behind the engine gas or diesel for that mater, is to keep the engine in peak torque range... if that makes any sense

https://www.bmikarts.com/Go-Kart-Gear-Ratio-Speed-Calculator
 

·
Registered
Joined
·
560 Posts
Yes, that's a CVT of the most common type, with variable-diameter pulleys and a belt. Strangely to me, the rear pulley diameter is the one which is controlled, unlike a typical snowmobile CVT.
it's the front, the rear is just spring loaded.
what's different to the systems I know (mopeds), is that the clutch is at the rear and not at the front.

And yes, good one to replace with fixed toothed belt pulleys.
 

·
Registered
Joined
·
29 Posts
Yes, like Amateur and brian mentioned, it’s CVT. I would mount electric motor on front pulley. So it would replaces petrol engine. Is that possible?
What 20kW motor do you use Amateur? I woukd need something 20-25kW, nit too heavy, not to big....

Thanks,
 

·
Registered
Joined
·
18 Posts
Discussion Starter #20 (Edited)
To answer your question yes you could have attach a motor of your choosing to any moped or scooter you wish. You would need access to a lathe and some scrap material, And time of course. The motor I am using is a Lynch motor (D135RAG) it is about 45 lbs and a peak is capable of 34kw burst but rated at 16kw for continuous use. Now believe me when I say it's quite pricey, but worth every cent!!! I have never been terrified of anything electric until now. I pick mine up from cloud Electric about 2 two years ago
For 1500. But has gone up in price since than to an eye watering 1700 - S&H.


https://www.google.com/url?sa=t&sou...FjAAegQIAhAB&usg=AOvVaw24uHPcaPjbyGLTo6TlrGGe
 
1 - 20 of 27 Posts
Top