Design and Manufacture of a Linear Actuator Based on Magnetic Screw Transmission

This article proposes a practical design guide for linear electromagnetic actuator based on the concept of magnetic screw transmission, in which manufacturing and assembly technologies are investigated. The surface-inserted is first used to form required helical-shape pole, exhibits simple processing, high precision, robust structure. Moreover, different topologies developed using 3-D finite-element analysis aided design, with goal optimizing thrust force. In addition, number permanent-magnet (PM) segments proposed reduce cogging effect. Afterward, integrates rotary machine together construct compact decouples circuits. decoupling focuses self-shielding effect Halbach PM array, special bearing supports selected avoid eccentricity. Finally, prototype built techniques. Experiments carried out test bench, verifying theoretical analysis.