Power DC Motor: Voltage, Current & PID Control

[pdfmech]

I have some confusion on how to power a 1 hp DC winch motor that is intended to run off a 12 V battery. I need to precisely control the velocity of the motor and will need a PID controller to do this. Since speed of the motor is proportional to the supply voltage, is 12 V the maximum voltage and corresponding speed that the motor can reach? Can I apply a voltage greater than 12 V to it? I need to find a motor driver/controller that can handle the current draw. Does anyone know of a controller that can run this motor. Ideally it would have PID built in but it is not necessary. I believe my questions are from a lack of understanding of how voltage and current are related. Also the winch will not be spinning very fast(no more than a line speed of .5 feet per second). I am currently building a tachometer for the feedback control. Any help/suggestion is greatly appreciated.

 

[Averagesupernova]

You should not drive the motor with more voltage than what it is rated for. You also need to take into account that the speed of the motor is also dependant upon the load as well as the voltage it is driven with. How is this motor wound? Series? Shunt? Compound? What is the type of load? Is it a static load or does it change?

 

[pdfmech]

Unfortunately I have not been able to find a winch manufacturer that supplies detailed motor torque and power curves. All I have is that at o lb line pull the speed is 10 feet per minute with 10 amp draw. At 2000 lb line pull the speed is 2.5 FPM with 100 amp draw.

 

[Averagesupernova]

Have you disected it? Wondering what keeps it from freewheeling at half voltage. Is it purely mechanical or will running it at half voltage cause trouble?