500W brushed motor and controller MOD

[martinmertik]

Hello guys,

this is my first post on this forum. So...
I have an old 500W brushed electric motor that I removed from my sisters electric scooter. and it's very similar to MY1020 motor that I found online. It also came with small chinese controller on which it was written 24V/36V/48V. So I guess that controller supports up to 48V or am I wrong? It has two caps and both are 470uF 50V. I plan to use motor and controller on my vintage bycicle for college ebike competition and I would be so happy if I could squeeze more than 500W out of it. I would like to do shunt mod for higher current and replace caps with larger ones for higher voltage.
I couldn't find any similar controller on internet and I do not know how to do the mod. However I know how to change caps, but don't know which ones to put in. I''m not too sure how to do the shunt mod on my specific controller as well. Here are some pictures from controller and motor. Do you think that motor could handle higher current and voltage? Also I'm good with soldering.
I will be using custom 18650 battery pack.
Thank you very much, I really appreciate it.

 

[motomech]

Wow, that's about an antique!
You might want to post this in the electric scooter section for more better replies.
Perhaps a moderator will do it for you.

 

[spinningmagnets]

There are several places on the web where you can find cheap brushed controllers. Here's one I see often

http://tncscooters.com/index.php?route=product/category&path=41

 

[martinmertik]

Yes it's old I reckon it's around 8 years old if not even more. Scooter was running on 3X 12v 12ah SLA batteries. I want to mod it as hard as I can. I can change FET's if it would make a ny difference. I'm new to EV stuff so I don't know exactly what to do .

 

[flat tire]

What you need to do is forget about that stuff, get a Chinese 1000W brushless hub motor kit off ebay for cheap. Make sure your 18650 pack is made of good cells, it's very much worth it. Anyway, with that kit, you will initially be blown away by the power and speed if you've never ridden any kind of ebike and it will have a nice range too.

The problem with that setup is the motor and controller have extremely limited power potential and at this point with cheap and powerful brushless motors and controllers easily available it's not worth messing with.

 

[martinmertik]

I drove few electric bikes and one of them was DH bike with 12KW cromotor. I'm interested in building DH bike with cromotor and so on in near future but that's not important now.
For this 500W build I'm not intending on buying new parts because I already own them. I'm totally happy with power of 500W, but if it's possible to squeeze more power out of it, then even better.
If I am right.. only one shunt is currently soldered on my controller. And it looks like another one could be soldered on the left side of existing shunt. If that's true can I solder on another shunt?

Here are few pictures of FET's. Left pair of FET's are different then right pair of FET's as it can be seen in pictures. Can I change those for something better?

What you think is the empty spot at label J1 and J2 on the board?