This paper deals with the operating modes of a 3-degree-of-freedom (3-DOF) electric machine. The design of such a machine allows the rotor axis to rotate along two angular coordinates in a limited range of angles. This is necessary for the machine to operate as part of a small-sized. high-speed precision target detection and tracking system. https://www.morehartandweinman.com/product-category/technical-svc/