Eddy Current Braking Force Analysis of a Water-Cooled Ironless Linear Permanent Magnet Synchronous Motor

The ironless linear permanent magnet synchronous motor (ILPMSM) is highly compact, easy to control, and exhibits minimal thrust fluctuations, making it an ideal choice for direct loading applications requiring precise positioning accuracy in test rigs. To address the issue of temperature rise resulting from increased primary winding current simultaneously enhance density while minimizing this paper introduces a bilateral-type ILPMSM with cooling water jacket integrated between dual-layer windings movers. adopts coreless structure where upper lower are closely spaced cooled by non-conductive metal jacket, dual-sided secondary employs Halbach array. motor’s overall braking force combination electromagnetic generated energized eddy induced on jacket. This specifically focuses analysis force. Initially, geometry working principle presented. Subsequently, equivalent magnetization intensity method employed determine no-load air gap magnetic An analytical model then developed derive expressions water-cooling validated through finite element analysis. Then, comparative forces two structures, namely inter-cooled type two-side ILPMSM, conducted. Moreover, characteristics thoroughly examined concerning size parameters operating conditions. provides solid theoretical foundation subsequent optimization design proposed motor.