Akademik Veri Yönetim Sistemi
Physica Scripta, cilt.0, sa.0, ss.1-11, 2025 (Hakemli Dergi)
Mechanical circulatory support (MCS) systems are implantable devices designed to assist or replace the pumping function of a failing heart, ensuring adequate systemic circulation. Because they must operate continuously and under variable physiological loads, these systems require compact and energy efficient electric drives. This study examines an MCS configuration that integrates a dual axial-flux permanent magnet synchronous motor (dual-AFPMSM) and operates it with a load sharing strategy to improve overall efficiency and extend battery life. In the proposed approach, the torque demanded by the axial flow pump is distributed between two identical AFPMSMs so that each motor operates closer to its high-efficiency region, thereby reducing AFPMSM losses; this is the fundamental mechanism behind the efficiency gain. The AFPMSM was integrated into the axial-flow pump with priority given to volumetric efficiency and unobstructed blood flow, and application-specific constraints were considered during the mechanical design. Finite element analysis (FEA) was used to validate motor performance under the target operating conditions. A comparison of single- and dual-AFPMSM operation shows that, under rest conditions, load sharing improves efficiency by 11.8–17.4%, while under exercise conditions it improves efficiency by 6.5–14.7%. This reduction in electrical power demand translates into up to a 14.6% increase in battery operating time during exercise. These results indicate that a dual AFPMSM architecture with explicit load sharing is a promising option for next-generation MCS devices, providing reliable circulatory support with improved energy utilization and longer runtime.