Qs 273 3.5t winch build

[trey]

I am planning on building a high speed winch to use for wakeboarding, I just bought a qs 273 3.5t 8000w as the motor and was hoping to get some advice for what the best controller would be used. I plan to buy a 72v 15ah Samsung battery and want to be able to have roughly 15hp of power. I'll attach a link to similar electric winches that sell now for the idea of what I'm doing. Thanks for any help if anyone wanted to take the time!

Motowinch

motowinch.com

Rewinch

Rewinch is a portable electric winch for wakeboard, snowboard, wakeskate, skimboard and more. With 1R2D add-on you can get bidirectional / two way rides

rewinch.com

 

[dominik h]

I think you need big tourque from start, so you have to choose one with high phase current.
If I´m correct with the big tourque I would at least go for a Fardriver ND72680.
Probably you need even bigger Versions like 721000 or 721200

 

[trey]

It needs a lot of torque right off the start to get the rider going but once the rider is on top of the water it's not a lot of resistance, a common problem with these is once you jump on the air the winch actually pulls more. Do you think that will happen with any controller or could programing fix that.

 

[dominik h]

Depends on your programming skills, when you are able to communicate with the controller via CAN, you can make him to react like you want.
Standard Controllers use tourque control. When you suddenly need less tourque the rpm will raise.

Probably the VESC based controllers can be programmed to hold a set rpm, but I haven't done anything with VESC.

 

[trey]

Is there a way to have the option to plug directly into a wall socket (110v) and have that power the motor.

 

[harrisonpatm]

Is there a way to have the option to plug directly into a wall socket (110v) and have that power the motor.

Not really, and certainly not at the power levels you're looking at. Consider that the average wall socket can deliver max 15a at 120v, so you're maxing out at 1800w. If you really want a plug-in option, there are plenty of 120 or 240v winches available for purchase.

 

[99zip99]

I looked up the website I like the handheld bluetooth remote control device. Maybe a controller with some sort of Bluetooth operation for your remote control handset Bluetooth of course.
Battery would be an important part. Like spaim08 cells cheap. If they can produce for your needs.

 

[Chalo]

Battery would be an important part. Like spaim08 cells cheap. If they can produce for your needs.

A123 26s3p 72V 58.8Ah pouch battery modules - BRAND NEW!

These Brand New A123 batteries were part of a conversion that fell through. We have several hundred of these modules that are now available for dirt cheap!

www.greentecauto.com

 

[99zip99]

Great love that cell. Stays in balance. Last a long time. How would I get one of those on my bike I wouldn't know
Must be just under 200 lb ? Only 101 lbs.

 

[Chalo]

Great love that cell. Stays in balance. Last a long time. How would I get one of those on my bike I wouldn't know
Must be just under 200 lb ? Only 101 lbs.

Sounds like scooter stuff to me. I'd put it in the other end of a canoe so the bow doesn't rise up too far out of the water.

 

[LewTwo]

How would I get one of those on my bike

On a two wheel trailer pulled behind the bike ???

 

[99zip99]

That A123 battery pack could run a lot of 110 volt devices. As my 72,v A123 20ah pack runs 1,200 watt hair dryers an AC unit. I stopped trying to devices as it doesn't have a BMS or fuse.
Oh you need a breaker so you can read turn it back on in case something happens around the water and whatnot.

 

[99t4]

Is there a more appropriate subforum for this thread? It obviously doesn't seem to fit in EBike General Discussion , but where to put it?