2018-06-17, 10:27 PM
I made tests today with a hydraulic motor. The controller drives the motor fine. It draws 12 amps moving the rudder. There is a voltage drop of 0.15 votls from the controller, so 1.4 watts loss plus 0.3 watts for the arduino and mosfets driving 144 watts so 98.9% efficiency.
The barely get warm at all. I don't think they need a heat sink below 15 amps continuous power, and this agrees with my calculations, as well as measurements. Despite this I intend to use a metal box. Once I do more testing and improve the board design I hope to have it available for use with hydraulic motors, although I think cheaper controllers can also work with cooling and less efficiency.
The barely get warm at all. I don't think they need a heat sink below 15 amps continuous power, and this agrees with my calculations, as well as measurements. Despite this I intend to use a metal box. Once I do more testing and improve the board design I hope to have it available for use with hydraulic motors, although I think cheaper controllers can also work with cooling and less efficiency.