This page describes the development of mathematical models of electromechanical systems (systems with physically coupled electrical and mechanical systems). It is suggested that you read about translating mechanical systems, rotating mechanical systems and electrical systems before starting. Many of the systems operate through the coupling of a magnetic field and a moving wire with current through it. A brief review of the physics involved in this magnetic field coupling is given in the "Background" page. They "Systems" page then gives a wide variety of devices (some coupled via the magnetic field, some not).