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u/Sad_Cow_5410

r/PCB r/PrintedCircuitBoard
Image 1 — [Schematic Review Request] Screw Compressor Controller 24V
Image 2 — [Schematic Review Request] Screw Compressor Controller 24V
▲ 2 r/PrintedCircuitBoard

[Schematic Review Request] Screw Compressor Controller 24V

Thanks for taking a moment to look here. This is a PCB for a screw compressor (which has a physical safety pressure relief valve!)

The screw compressor is actuated by a VFD communicated over using modbus, and controlled with the pressure sensor and the so-called unloading solenoid (allows compressed air back into the intake to help the motor start when under pressure).

I think the circuit consists mostly of 3 interesting parts, the 4..20mA pressure sensor, the solenoid actuator through a mosfet and the power circuitry where I am for the first time using this MPM3550 IC which seems like a very robust power IC.

I'm grateful for any feedback. Manufacturing of this incl. assembly with JLCPCB is $73 including shipping for 5 boards, 2 assembled. I'm on the fence whether to spare costs by going a different route with the 42v->5v regulator but I quite like this IC and I'd like to try it once.

Thanks in advance!

u/Sad_Cow_5410 — 2 days ago
▲ 1 r/PCB

Review request, 24v screw compressor controller

schamatic

pcb top side

Thanks for taking a moment to look here. This is a PCB for a screw compressor (which has a physical safety pressure relief valve!)

The screw compressor is actuated by a VFD communicated over using modbus, and controlled with the pressure sensor and the so-called unloading solenoid (allows compressed air back into the intake to help the motor start when under pressure).

I think the circuit consists mostly of 3 interesting parts, the 4..20mA pressure sensor, the solenoid actuator through a mosfet and the power circuitry where I am for the first time using this MPM3550 IC which seems like a very robust power IC.

I'm grateful for any feedback. Manufacturing of this incl. assembly with JLCPCB is $73 including shipping for 5 boards, 2 assembled. I'm on the fence whether to spare costs by going a different route with the 42v->5v regulator but I quite like this IC and I'd like to try it once.

Thanks in advance!
Thanks

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u/Sad_Cow_5410 — 2 days ago