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Search: Posts Made By: turbo1889
Showing results 1 to 13 of 13
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Forum: Electric Bikes
01-13-14, 01:48 PM
Replies: 46
Views: 7,892
Posted By turbo1889

If they can take 5A per cell with no problems...

If they can take 5A per cell with no problems then your plan of using 3 cells in parallel by 13 in series sounds good to me (13s3p configuration).

As to charging, I've never tried to build a...
Forum: Electric Bikes
01-12-14, 11:24 AM
Replies: 46
Views: 7,892
Posted By turbo1889

Okay, a bit longer to get back to you, I ended up...

Okay, a bit longer to get back to you, I ended up spending the night in town at a friends place, and just now and getting up on this lazy Sunday morning and using her computer to respond to your...
Forum: Electric Bikes
01-11-14, 11:14 AM
Replies: 46
Views: 7,892
Posted By turbo1889

@ Tohot I'll take that last post of yours as...

@ Tohot

I'll take that last post of yours as asking for a reply from me. Sorry, I've got an appointment I'm already late for and I've got to get on the bike and get moving and get into town, I'm...
Forum: Electric Bikes
12-10-13, 01:41 AM
Replies: 46
Views: 7,892
Posted By turbo1889

Top speed usually isn't an issue as far as...

Top speed usually isn't an issue as far as overheating a motor unless your running it way over specs. Its when you bog it down on a long hill and just keep the throttle pinned at full that starts to...
Forum: Electric Bikes
12-08-13, 01:47 PM
Replies: 46
Views: 7,892
Posted By turbo1889

Sorry it took until now to get back to you, I've...

Sorry it took until now to get back to you, I've been busy and fighting the weather (which can more then double my commute and supply run times cutting into my free time) the end of this last week.
...
Forum: Electric Bikes
12-04-13, 09:56 PM
Replies: 46
Views: 7,892
Posted By turbo1889

I know that usually you can get away with 16s...

I know that usually you can get away with 16s instead of 15s and get in one extra cell and run 51.2V instead of 48V on a controller and motor designed for 48V. I've done it myself without issue but...
Forum: Electric Bikes
12-04-13, 09:53 PM
Replies: 46
Views: 7,892
Posted By turbo1889

If your going to build a pack from cylindrical...

If your going to build a pack from cylindrical cells you need to buy ones that have solder tabs already pre-micro-welded to their ends like this:
...
Forum: Electric Bikes
12-03-13, 12:14 PM
Replies: 46
Views: 7,892
Posted By turbo1889

If you only need 30-min of duration those...

If you only need 30-min of duration those batteries are larger then you need and you could easily get away with batteries half their size.
Forum: Electric Bikes
12-02-13, 12:11 PM
Replies: 46
Views: 7,892
Posted By turbo1889

Not on a motor like that with a freewheeling...

Not on a motor like that with a freewheeling assembly inside of it (although you would be wasting power by just having the motor spin and be doing nothing since your pedaling faster then the motor so...
Forum: Electric Bikes
12-01-13, 08:04 PM
Replies: 46
Views: 7,892
Posted By turbo1889

If your going to go with a small wheel then you...

If your going to go with a small wheel then you want to run the higher 48V to make the motor spin faster to get decent speed out of the smaller wheel which must spin faster then a larger one to go...
Forum: Electric Bikes
12-01-13, 03:29 PM
Replies: 46
Views: 7,892
Posted By turbo1889

I was probably getting too deep for you with...

I was probably getting too deep for you with bringing up the kV rating. If your using off the shelf e-bike motor and building totally from scratch then you probably don't need to know or consider...
Forum: Electric Bikes
12-01-13, 01:42 PM
Replies: 46
Views: 7,892
Posted By turbo1889

My other 12V builds I used either industrial...

My other 12V builds I used either industrial brushed motors designed for 12V (big and heavy but okay for a cargo bike that is going to be big and heavy anyway), brush-less higher power automotive...
Forum: Electric Bikes
12-01-13, 01:33 PM
Replies: 46
Views: 7,892
Posted By turbo1889

That part you are missing is what is known as the...

That part you are missing is what is known as the "kV" rating of an electric motor which has to do with how its coils are wound. Basically to get the free running no load top speed of an electric...
Showing results 1 to 13 of 13


 
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