When sourcing a Fuji traction machine, you must prioritize the Permanent Magnet Synchronous Motor (PMSM) technology, which offers higher efficiency and lower noise compared to traditional induction motors. Key specs include the rated load capacity (e.g., 450kg to 2000kg), rated speed (ranging from 0.4m/s to 4.0m/s), and the sheave diameter, which must match your elevator rope specifications. Additionally, ensure the braking torque is at least 200% of the rated torque to meet safety redundancy requirements.