Transverse-Flux Type Z-θ Actuator with Double Gaps

Abstract

　A Z-θ actuator is expected to achieve a two-degree-of-freedom positioning mechanism which has a high positioning accuracy, small, and lightweight. However, the improvement of a torque and thrust density is important for further higher performance, thus, we focused on a transverse-flux structure. This paper proposes a novel Z-θ actuator with double gaps. The actuator is combined with a transverse-flux type linear actuator and a permanent magnet synchronous motor. The thrust and torque characteristics are investigated by a magnetic field analysis using a three-dimensional finite element method. It is clarified that the actuator can generate torque and thrust by the proposed operating method and magnetic circuit, the mover structure for improving the output is considered.