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3 phase Brushless DC Motors


MikeBurton_2000
(@mikeburton_2000)
Active Member
Joined: 3 years ago
Posts: 13
Topic starter  

Good evening to everyone. I am very much new to DroneBot Workshop, but have found the info and video's to be hugely interesting and helpful.

I have access to motors which are I believe 3 phase Brushless DC Motors with hall effect sensors. I would like to learn how to control these via Arduino so I can use them in robotics and animatronics projects. I know the motors are capable of forward and reverse and have a fair range of speed.

My question to the good people of this community is basically, how do I wire them up? I have a schematic which helps to identify the connections (8 wires in total) and the motor is the one highlighted in red. It has obviously been removed from the circuit depicted in the diagram.

image

What would be the best way to control this via the arduino? I have a couple of boards like the Cytron MD10C R3 and DC 12V-36V 15A 500W Brushless Motor Controller Hall BLDC Driver Board Support Hall Motor (Link to BangGood item) but I am not sure if they are suitable.

Hope this is somewhere near enough info to get a start, but more is needed, please feel free to let me know about it.

Thanks in advance

Mike

Ooops, I did it again!


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MikeBurton_2000
(@mikeburton_2000)
Active Member
Joined: 3 years ago
Posts: 13
Topic starter  

So, this is where I have got to so far:

My BLDC Motor Control Board arrived from China. I wired everything as per the above diagram to the control board and applied 12v (just being cautious to start with).

When I connected 5V and VR, the motor started to spin up. I let it run for maybe 1 second and disconnected. I waited a few seconds and tried again. The motor seemed reluctant to move. I moved it one "step" by hand and connected %v to VR again and one more it started up. Again I let it run for about a second.

Each time it stopped, it was reluctant to start. I tried holding the connection (5v to VR) slightly longer but with no change. On the final attempt, I help it for a few seconds and noticed the shunt started to get hot (glowing) and then all the magic smoke came out! Strangely enough, after this, the board would do nothing.

Does this sound that although I have made the hall sensor connections as per the manufacturer's diagram (in my first post) that the sensor connections could be mixed up, or maybe the phases?

Any thoughts on what I may have messed up wold be appreciated.

image

This is the arrangement I had before I broke it.

Ooops, I did it again!


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robotBuilder
(@robotbuilder)
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Joined: 3 years ago
Posts: 1247

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MikeBurton_2000
(@mikeburton_2000)
Active Member
Joined: 3 years ago
Posts: 13
Topic starter  

Thanks for the links. I had viewed many posts on Youtube etc but I did not see anything that helped me clearly identify what I have got wrong - which I obviously have, hence the magic smoke.

Some of the info was probably very informative but not very beginner-friendly. 

When looking at the manufacturer diagram in my first post and comparing it to the diagram in my second post where I have hooked the motor and 24v to the ready-made controller, I am not able to see what I did wrong either.

I followed info I found online about connecting 5v to VR etc but it comes to figuring out of what I have got wrong the light bulb moment is being evasive.

Ooops, I did it again!


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