The datasheet attached is contradictory as it shows two wires on the figure and three terminals U,V,W on the table.

If it has three wires that is not a brushed DC motor but a brushless DC motor; which is a three phase AC machine. You need a three phase power converter or an ESC to connect to phases denoted as U,V,W. Hall effect sensors will allow for closed-loop speed control in case you are building/using a sinusoidal power converter which does not use six step commutation.

This might help:

https://www.researchgate.net/publication/317958200_Design_and_Implementation_of_an_Electronic_Speed_Controller_for_Brushless_DC_motors

Check the actual wiring coming out of your machine.

Regards

Kris

Thesis Design and Implementation of an Electronic Speed Controller ...

@Kris Scicluna it has 8 wires cumming out of it exactlly as described in the diagram, I have got the data sheet from the supplier. I was thinking that I would be able to build a controller for this motor(depending on the effort  needed to build it) or just buy one, since my project is not really about motor controllers. what would you recomand ?

Thank you!

Mihai

Therefore:

U,V,W - Power Terminals Phase A, B,C

5V, GND - Hall Effect Sensor Powers

HALL A, B C - Hall Effect Sensor Terminals with respect to GND

The dissertation I attached has full details on the construction of the DC-AC inverter for such applications but building, testing and control requires significant work. I would recommend an off the shelf unit. This should do the trick:

https://electricscooterparts.com/hookup/SPD-36350BLDC.pdf

@Kris Scicluna for a motor controller that will be embedded in a product that will be produced serially what would you suggest?