brushless motor system

[John75]

Good morning to all,
I am mainly a fan of the DIY in the field of wood and metals, but now by necessity I have come across electric parts where purtoppo are ignorant to the maximum and therefore I ask for help if possible.
I now explain to the best, from an old electric robot cutter I have recovered 2 brushless motors (after I try to attach photos ) I wanted to recover them for a two-wheeled cart that I built and do it motorized, reading on various tutorials I have come more confusion than other, I have seen that I need a power station and an accelerator to make it work , but I do not understand that power station is necessary.
thanks early for those who can help me

 

[TETRASTORE]

characteristics of your engine are shown in this manufacturer's catalogue on page 14-15 and its original controller is on page 16. I did not understand however if in your model the controller is already integrated as it would appear from the number of cables coming out and from the indication in the table on page. 9; you can still ask confirmation by email manufacturer service.
from the length it seems that there is coupled an epicycloidal reducer, also verify this.
if you do not have the built-in controller could also work with a controller as shown in This video (there are also links to return it) but the original would be preferable, of course it will cost more.
But I see a problem: claim to want to apply this engine for the motorization of a trolley; consider that the nominal torque of this engine is only 11 ncm (0.11nm) and that to operate an electric skateboard you use engines type questo da 9 nm So, in your case, don't think about going up. As for the speed you indicated, you should rotate the engine to 600 rpm to have a speed of about 6.8 km/h with a wheel of 60 mm in diameter. you can get a higher torque using the engine at maximum speed and applying a reduction (e.g. 6:1), also your engine is for a voltage of 24V so you will have to equip yourself with an adequate battery.

 

[John75]

Thank you very much for answering me.
Now I try to understand what you wrote, but I'm very ignorant about it.
The controller you name is the control unit? I'm the same?
Epicyclical reducer to what would it serve?
in the morning I write to the assistance to ask for the info you brought me back
On the other hand, the nm disc and its weight, the full load must be about 50kg, putting 1 x wheel motor in 2 parallel wheels could pull it or would still be few nm to do so? And according to you, even if he can move it, there's danger that the first pebble he finds is blocked?
thanks again for your availability

 

[TETRASTORE]

The controller you name is the control unit?

Yes, it is the device that allows you to start, stop, accelerate and reverse the bike.

Epicyclical reducer to what would it serve?

assumed that the motor has a nominal speed max. of about 3600 rpm (turns per minute), considering the wheels (hypothetical) of 70 mm diameter, you would have a maximum speed of 3600x0.07x3.14x60=47477 meters/hour corresponding to 47 km/h, so to bring it to the value you have indicated, you must reduce it of about 6-7 times or with the controller maintaining the near constant tor to 600 however increasing the torque from 0.11 nm to 0.66 nm (0.11x6) theoretical and 0.66x0.95=0.63 nm real, considering the performance of the reducer (0.95).
from the resulting torque value with the reducer (0.63 nm) and knowing the diameter of the moving wheels, you can get the force with which the cart will be pushed; in your case, always considering wheels of 70 mm you would have: 0.63/0.035= 18 n.
if you want to do a practical test try to pull the cart of 50 kg by exercising a force of 18 n (about 1.8 kg); you can only do it if it is perfectly flat with steel wheels on steel tracks, with wheels of skate or rubberized, on ground or road not.
a thing you didn't ask, but I'll advance you; If you want to use two equal engines, it is essential to use two controllers (one per engine) to ensure synchronism.

 

[John75]

I've been able to understand what you mean (not because of you, but by ignorance of me)
Unfortunately the wheels are rubber and 260mm the classic ones of the 2 wheels hulls to carry bags and another time unfortunately where I should make it go is not slow, but dirt and chicken field ... a disaster, I realized that these engines are not good (at least for this job ) if I wanted to buy one/two engines that components would recommend me for the job that I should do? what characteristics should they have?
Thank you again for your availability

 

[TETRASTORE]

given your little experience in this field, I suggest you evaluate the electric bike kits like this which already have all the components you need, including controls, pinion, crown and chain for transmission. if you look on youtube there are other models like this which is also equipped with all the commands easily applicable to your application. See also this example of kit more compact.
you have to do a search by evaluating the cheapest and most suitable kit for your application; the power that can serve you is 500-800 watts, checking if you need to increase the reduction (densed crown diameter) to adapt it to the speed you require.

 

[John75]

Thanks now I see everything
Thank you very much