Design and Permanent Magnets Reduction of Linear Oscillatory Machine for Reciprocating Drives in Transport

Electric vehicles (EVs) require efficient compressors for air-conditioning and battery thermal management, typically driven by a dedicated electric motor. In this paper is dealt with the design and optimization of a stator-magnet transverse-flux linear oscillatory machine (SMTLOM) intended for such compressor applications. The topology employs permanent magnets embedded in the stator, enabling simplified assembly, improved vibration robustness, and reduced dependence on rare-earth materials. A detailed 3D finite element analysis was conducted to maximize the performance, while minimizing the volume of permanent magnets. The results demonstrate the feasibility of SMTLOM for EV compressor drives and highlight the trade-offs between force capability, efficiency, and magnet usage.