High power drive motors

[Danjr1]

http://ukrobotics.com/ukrobotics/html/h ... ronize.htm

[PJ-27]

What is the advantage of putting a 30a external relay on a 30a ESC?......

[typhoon_driver]

well easy of change out for one if you use space connectors but the other reason is that the automotive relays generally will run slightly higher than the 30A. You could also throw 40A relays in there. Possibly something bigger but i've never experimented (might do so at some point as i have a few spare controllers and now need to control some dewalts)

[Eventorizon]

The speed 900's are £35-38 each, well they were from the company I chose, but I think I burned mine out as the disc was touching the floor half the time and stalling the motor, see Conker vs Inertia vs 4 4 toon

If I could swap my Gimson's for a single speed 900 and drive the rear wheels with a belt drive I could save a ton of space inside the robot and gain loads of push and loads of weight

[PJ-27]

May try the relay swap on our 15a ones. I think we're starving the dewalt motors we have of current. Gunna make the ESCs huge though!

[typhoon_driver]

It's not like you're short on space!

[PJ-27]

Haha, things got pretty tight in Bitza Mk2.

[mattsdragons]

Haha, things got pretty tight in Bitza Mk2.

and a little heavy

[PJ-27]

Haha, yeh just a bit!

[Danjr1]

spoke to electronize today and they said that performing such a conversion is fine but 40a is generally the max you can take them to. The MOSFETs won't take much more than that apparently. He also said that you can order the FR30HX ESCs as 40a variants at the same price as the normal ones, you just have to provide the 40a relays.

To convert each ESC, you would need two of these in theory (http://www.ebay.co.uk/itm/12V-CAR-AUTO- ... 0268094470) but if you're running 6s lips, would you need a 24v version?

a PDF version of the 40a conversion http://www.technobots.co.uk/Data Sheets/1500-021.pdf