2026-05-16, 12:10 AM
1) smaller size fuse will have more contact resistance creating more heat. This is why the large maxi fuse was selected.
2) using a single mosfet (of higher on resistance) will make much more dissipation. My 30 amp board has 500 micro ohm on resistance (because 4 parallel) this has 2 milli ohm. So it will create basically 4 times more heat? Why not put 4 in parallel? For me, the 30 amp rating means the board will not heat more than 10C and remain very efficient.
3) Adding a fan makes it less reliable because moving parts have lower reliability. This is why I used 63v capacitors because they will have a very long life in a 12/24v motor controller. If this depends on a fan for operation because of higher heat dissipation because of fewer mosfets the reliability is reduced not improved.
4) is there any longer a buck converter with overcurrent (short circuit protection so if rudder feedback or other sensors short out) for the 5v side and sensors? This reduced quiescent (standby consumption) to 2mA, but I dont see any inductor for this.
Maybe with 4.5 oz copper compared to 1oz, it can dissipate heat much better, but now the BOM cost is $75?? nearly double the original design that was also 4x more power efficient. Is this really "improved"? Maybe the pcb is a bit smaller?
I think you will find that hand soldering components will create a bottleneck in production. I learned this the hard way after consuming more than 8 pounds of solder by hand soldering. At least my current design can be fully assembled.
if something is better or can be improved and I can get feedback for why I would like to adopt it but I am skeptical, maybe the connectors (JST JWPF) are an improvement over the chinese waterproof connectors I've been using, can you say why?
Please continue the discussion! Also consider brushless motor controllers.
2) using a single mosfet (of higher on resistance) will make much more dissipation. My 30 amp board has 500 micro ohm on resistance (because 4 parallel) this has 2 milli ohm. So it will create basically 4 times more heat? Why not put 4 in parallel? For me, the 30 amp rating means the board will not heat more than 10C and remain very efficient.
3) Adding a fan makes it less reliable because moving parts have lower reliability. This is why I used 63v capacitors because they will have a very long life in a 12/24v motor controller. If this depends on a fan for operation because of higher heat dissipation because of fewer mosfets the reliability is reduced not improved.
4) is there any longer a buck converter with overcurrent (short circuit protection so if rudder feedback or other sensors short out) for the 5v side and sensors? This reduced quiescent (standby consumption) to 2mA, but I dont see any inductor for this.
Maybe with 4.5 oz copper compared to 1oz, it can dissipate heat much better, but now the BOM cost is $75?? nearly double the original design that was also 4x more power efficient. Is this really "improved"? Maybe the pcb is a bit smaller?
I think you will find that hand soldering components will create a bottleneck in production. I learned this the hard way after consuming more than 8 pounds of solder by hand soldering. At least my current design can be fully assembled.
if something is better or can be improved and I can get feedback for why I would like to adopt it but I am skeptical, maybe the connectors (JST JWPF) are an improvement over the chinese waterproof connectors I've been using, can you say why?
Please continue the discussion! Also consider brushless motor controllers.