motor controller 250W (24V)

AS

Hello!

I want control two DC motors with 250W (24V), something like this (http://www.instructables.com/id/Easy-build-self-balancing-skateboardrobotsegway-/).

I see that this is a great motor control: Sabertooth Dual 25A 6V-24V (https://www.dimensionengineering.com/products/sabertooth2x25).

My question is: Somebody know other motor controller to control one or two motors with 250W each? (Sabertooth is too expensive)

Any sugestions?

Thanks!

AS

My conclusion is:

Sabertooth have the best spcifications and performance, are really good for robotics, I don´t see anything with better price. Fantastic in their pdf´s they speack about Basic Stamp
If somebody don´t agree with me please tell!

I thinking to use this (http://www.ebay.co.uk/itm/10-50V-40A-PWM-DC-Motor-Speed-Control-Controller-CW-CCW-Reversible-Pulse-Driver-/262341277587?hash=item3d14c23793:g:sccAAOSwr7ZW7BW6) control the PWM and the direction, with the Propeller! Any sugestion?
My only problem is the protection of the batteries I´m not sure if this speed control cares about it! :P

Sabertooth is quality the other solution is the unknown! any sugestion? Thanks!

AS

Syren have a better price I! I don´t have sure why!!
(https://www.dimensionengineering.com/products/syren25)

It´s only for one motor, that´s why!

JasonDorie

I built this with a Sabertooth, and it works very well. https://hackaday.io/project/6999-sideway

The EBay link you posted doesn't show any way to control it from a microcontroller - it needs a TTL or PWM input of some kind, not a variable resistor. It's possible that it has it, but I didn't see it.

AS

JasonDorie, your project is great, I want to do something like that :P

I don´t understand how I can control, the ebay motor control, with PWM too.

Sabertooth is great to save the batteries, don´t allow that the batteries go lower than 3V. I´m thinking in build a batterie like that (http://www.ebikeschool.com/how-to-build-a-diy-electric-bicycle-lithium-battery-from-18650-cells/).

My question is:
With the sabertooth I will need the Battery Management System?
You havn´t use any BMS?

Thank you

JasonDorie

I don't use any sort of battery management, no. The batteries I use are large enough that any back-current wouldn't hurt them. I charge them with a separate charger that does the balancing, so I only have to worry about over-discharge.

AS

Very interesting, thanks!

You can give me a example of a charger that does the balancing?

At this moment I´m looking to ([url="http://"]www.ebay.co.uk/itm/3-36V-Dual-15A-H-Bridge-DC-Motor-Driver-30A-for-Robot-Car-Arduino-Compatible-/171012036277?hash=item27d11c96b5:g:pdUAAMXQySpRS-kz[/url])
What you think about that?
I think I will try to see how it works.

JasonDorie

For chargers, something like these:
http://www.hobbyking.com/hobbyking/store/__7028__Turnigy_Accucel_6_50W_6A_Balancer_Charger_w_Accessories.html
http://www.hobbyking.com/hobbyking/store/__11444__Turnigy_A_6_10_200W_Balance_charger_discharger.html

They're both pretty standard lithium battery chargers. I run 3-cell packs in parallel, so it's 24v total.

The motor controller you linked to should handle what you're doing, but the only way to know for sure is to try it.

AS

Thanks a lot JasonDorie.

I think I will try the last motor controller I linked.

I will try make a batterie with 7 cell with 4 in parallel, almost 26V (3,7x7) and 10A (2,6x4), I will use a BMS to manage it.

With this battery I need a charger with 26 V and how much current?
Any sugestion?