Design and Analysis of Magnetic Transmission for Converting Between Rotary and Rectilinear Motion

A novel high-performance magnetic transmission (MT) for converting between rotary and rectilinear motion is proposed. The construction and operation principle of the proposed MT are described. The analytic computational formula for air-gap flux density is obtained. The electrical magnetic distribution of the MT is computed by FEM. The characteristics of the novel MT are analyzed and compared with traditional magnetic transmission without ferromagnetic pole-piece. The optimum shape of ferromagnetic pole-pieces is discovered. The experiments are implemented to evaluate the performance of the prototype MT. The maximum static force and torque of the novel MT are measured. The experimental result verifies the rationality of the structure of the MT. Compared with conventional magnetic gear rack, the static force and torque of the novel MT are improved greatly.