I have an antenna rotor DC motor that draws 7-8A continuous (~10A turn-on) and is controlled by a proprietary controller. I have reverse engineered the controller and it uses a PIC18F to switch two PNP transitors which in turn switch 2 half H bridges consisting of pairs of IRF540N and IRF5210. I checked with a scope and there is no PWM just direct gate control providing on/off and direction. It has a small 5v regulated supply for the PIC18F and I have powered it all with a parallel pair of deep cycle 12vdc batteries – these provide 240 A-h and can turn the antenna motor for hours of use. The motor turns too fast for my needs even with a 35 lb antenna load so I would like to replace the controller with somwthing like the Pololu High-Power Motor Driver 18v25 CS. Is this a simple swapping of controllers? Can any DC motor (I assume is is a brush DC given the speed, torque and weight load it can carry (75lbs) be driven this way by PWM or am I looking for trouble?
thanks in advance for any advice