A dual mechanical port (DMP) machine is a brand new type of electric machine, promising in many applications such as multi-source hybrid traction, integrated starter and generator, variable gearboxes and so forth. In this paper, the dynamic model is established and analyzed. Further, a prototype machine is designed and evaluated by finite element analysis. Several important operation modes are highlighted and the whole control system block diagram is configured for dynamics investigation. The control algorithms with the overall system operation performance are evaluated by computer simulation.