Characteristics Analysis of a 2-D Differentially Coupled Magnetic Actuator

In multi-degree-of-freedom (multi-DOF) systems, a number of motors are used to achieve a multi-DOF motion. However, these systems have problems, such as heavy weight, large size, and no back drivability due to the large number of motors. In order to solve these problems, there has been much work on multi-DOF motion using one actuator. In this paper, a novel 2-DOF differentially coupled magnetic actuator is proposed, and its structure and operating principle are described. A 2-D motion can be realized with the conventional motor control circuits.