DIY ebike Chargers

[heathyoung]

Another thought - LLC Converters - isolated, and well suited to PFC usage.

I'm thinking of just using a buck PFC topology as well. Too many possiblities, could also use 4 series 36V meanwell clones for $120.

 

[magudaman]

I've been following this tread with some serious interest. IN my quest for a greater than 30w/in3 chargers I came across these guys:

45x34x11mm 300 watts, requires external components but still!

http://www.power.czweb.org/psu.htm

Apparently just using a 555c timer and one IGBT. Looks like it needs the caps, a couple chokes, and your rectifier.

 

[megacycle]

Alright for a laptop supply wondering if they're were planning on kw.

 

[amberwolf]

Alright for a laptop supply wondering if they're were planning on kw.

:?

 

[megacycle]

Alright for a laptop supply wondering if they're were planning on kw.

:?

I was just thinking this would be off the shelf in the several hundred watts+ , got my hopes up, dashed again, serve me right for being lazy and following to many threads at once
If a 555 can drive an IGBT without much else but big caps and inductor, would be a good circuit to look at.

 

[megacycle]

3.3kw in a handheld, though it does look more like a suitcase.
Write up might be useful.

http://techon.nikkeibp.co.jp/english/NEWS_EN/20120120/203784/



Even at the stated dimensions those Japanese blokes must have huge palms :? .

Sorry guys wandering off topic now , but i want to build my mini chargers and i want them now or i'll cry.
Got my new A123 pouches and just brick server psu's strapped together to pump them.