Experimental Verification of Speed Change Characteristics in a Reluctance-Based Magnetic Lead Screw with Mismatched Thread Structure
Year: 2026
Type: conference-paper
Abstract: In industrial linear transfer systems, frequent acceleration and deceleration of motors degrade overall energy efficiency. To achieve stepwise speed variation under a constant motor speed, this paper proposes and experimentally verifies a mismatched thread configuration for reluctance-based magnetic lead screw with a consequent-pole. In this configuration, the linear velocity is kinematically varied by altering only the number of thread starts on the screw shaft while keeping the nut geometry fixed. A prototype featuring a 2-start thread nut and 2-start and 6-start thread screw shafts was fabricated. Static thrust characteristics were evaluated through three-dimensional finite element method and experimental measurements, confirming that non-contact power transmission remains feasible even in the mismatched thread configuration, despite a reduction in maximum thrust. Furthermore, dynamic driving tests under semi-closed loop control demonstrated that the linear velocity is tripled simply by replacing the 2-start screw shaft with the 6-start screw shaft, without changing the motor rotational speed command.
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7204154994