Eddy Current Dynamometer Control

I need a basic circuit to provide control to an eddy current dyno. I'm quite familiar with dynos and PID, but I need to know how to provide enough volts and current to an eddy current dynamometer. I assume we would use a solid state power control module, but I need your thoughts. For this project, I would just want to use a potentiometer to provide manual control. Once this method is working, an extension of this project could be the PID control, but do not quote on this.