[Schematic Review Request] ESP32s3 + DRV8305 Proof Of Concept All-In-One BLDC Driver for Resistance Exercise Training

[FilipH]

Hi everyone, I’d like someone to have a look over my schematic to make sure I haven’t made any stupid mistakes, any feedback would be massively appreciated.

This will be mounted on a proof of concept test rig simulating how an exoskeleton with a such system (1DOF e.g. elbow joint) would behave. Motor this will be used with: The Myactuator RMD X6 BLDC 36:1 24V 2.6 A (nominal) 18 Nm (nominal). The test rig will simulate a patient performing isometric type of exercise, pushing against the motor at a locked position until a defined/selected force is achieved; and isokinetic type of exercise, patient moving along the range of motion with a defined/selected resistance or ‘stiffness’. ESP32 will simplify UI implementation and integration with one core hosting the UI AP.

Schematics:

Thanks a lot for your time!

[runger]

Hi, @FilipH , welcome to SimpleFOC!

It looks like a decent schematics to me, although I have not had time to look into the individual Datasheets of all your components…

You plan to use it at what voltage?

[FilipH]

I can only share one picture per comment, hence there will be 5 of them in total. This is the newest schematics.

[FilipH]

Bottom side PCB

[FilipH]

Top side PCB

[FilipH]

GND Layer (in1)

[FilipH]

Voltage layer, one side has the motor voltage and the other side has 3V3

[runger]

It all looks very neat. The only thing I potentially noticed is the littlefuse TVS - it has a reverse standoff voltage below 24V so it will start to conduct already if you use the system at 24V. Maybe you want a slightly higher value there?