2018-06-12, 09:17 PM
(This post was last modified: 2018-06-12, 09:21 PM by seandepagnier.)
I have been testing today a new design which drives mosfets directly from the arduino and no ESC is used.
It can only do brushed motors, and it's designed for much higher power, to drive 30 amps continuous or 60 amps in peak. The typical ESC I used before were "30 amp" but have much smaller transistors and would be a problem to drive more than 10 amps, and even then only with good cooling. The "30 amp" esc work great for 2-3 amp motors like windshield wiper or old tiller pilot and wheel units.
This version can mount the mosfets directly to an inverter style box, and the mosfets are 1-2 milliohm on resistance. I also have all 60 volt parts which is safer and longer lasting, and additional protection for voltage spikes.
After initial issues, it seems to be working fine and the mosfets stay completely cold driving my wiper motor.
It has a lower idle current because there is only one uC now, so this saves power. In the future I may replace the 5v regulator on the arduino with a switching one to further save power.
I can also easily design for 12, 24, 48 or any voltage needed.
I hope to test soon sailing a boat with hydraulic motor. The motor draws 15 amps just moving the rudder. I will report my results.
It can only do brushed motors, and it's designed for much higher power, to drive 30 amps continuous or 60 amps in peak. The typical ESC I used before were "30 amp" but have much smaller transistors and would be a problem to drive more than 10 amps, and even then only with good cooling. The "30 amp" esc work great for 2-3 amp motors like windshield wiper or old tiller pilot and wheel units.
This version can mount the mosfets directly to an inverter style box, and the mosfets are 1-2 milliohm on resistance. I also have all 60 volt parts which is safer and longer lasting, and additional protection for voltage spikes.
After initial issues, it seems to be working fine and the mosfets stay completely cold driving my wiper motor.
It has a lower idle current because there is only one uC now, so this saves power. In the future I may replace the 5v regulator on the arduino with a switching one to further save power.
I can also easily design for 12, 24, 48 or any voltage needed.
I hope to test soon sailing a boat with hydraulic motor. The motor draws 15 amps just moving the rudder. I will report my results.