Components for High-Torque (20 Nm+) Arduino Motor Setup

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Hi,

I’m developing a robotic device hat requires to produce high torques (20-30 Nm) at low speeds (less than 16 RPM). I would like to control the motor with an Arduino and are currently looking for parts (motor, controller) similar to the ones presented here: https://www.youtube.com/watch?v=OW-Bf3yjUyE
I know that I can get the SyRen 50A (or a similar one) but I don’t know how to find an appropriate motor (in Germany). By the way, I’m rather unexperienced and would like to keep things as simple as possible (preferably as in the video above).

I only need to produce rather slow torque variations to set up some kind of force-feedback system. No position control or other fancy stuff.

Any suggestion would be highly welcome.

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Hello @Makkus and welcome to the RobotShop community,

Because you mention that you need high torques at low speeds an excellent choice in a gear motor. You can find many options in the Gear Motors / Boxes section of the store. If you are not familiar with gear reductions all you need to know is that they are used to increase the torque while decreasing the speed. In order to get the “final values” for the torque and speed you need to multiply the gear reduction by the gear ratio (less some efficiency losses) and divide the speed by the gear ratio. For example:


If you use that motor with that gearbox you will have:

  • Stall Torque: 343.4 oz-in*12=~4120 oz-in=~29 Nm
  • Rated RPM: 4614/12=~384 RPM

Or with the 16:1 Geardown

  • Stall Torque: 343.4 oz-in*16=~4120 oz-in=~38 Nm
  • Rated RPM: 4614/16=~288 RPM

But you can find many other combinations that could work for your project.

Now, to choose the motor controller you have to check the motor’s nominal voltage and continuous current. In the previous example you have:

  • Nominal Voltage: 12V
  • Stall Current: 133A -> Continuous current: 133*0.25A=~27-33A

You can find lots of options in the 30A+ DC Controllers section of the store. A good one is the one you mentioned:

But there are some other options available, like:

I hope this information can help you out!

Let us know if you need further assistance