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    Efficiency Optimization of PMSM-Type Elevator Machine: An Industrial Comparison
    (Mdpi, 2025) Soyaslan, Mucahit; Eldogan, Osman; Fenercioglu, Ahmet; Avsar, Yusuf; Ceylan, Nurdogan; Sarikaya, Muhammed Salih
    This study presents the design, modeling, and prototyping of an external rotor permanent magnet synchronous motor (ER-PMSM) specifically for elevator traction systems. The external rotor design aims to surpass the efficiency of conventional inner rotor gearless elevator traction motors. A commercially available 4 kW inner rotor permanent magnet synchronous motor (IR-PMSM) was selected for comparative analysis. Critical parameters, including stator tooth tip thickness, slot tip radius, slot height, stator yoke height, stator tooth thickness, and the number of turns per phase, were optimized to enhance efficiency. The artificial bee colony (ABC) algorithm was utilized for the first time to determine the optimal configuration of an external rotor PMSM. The prototype was fabricated and subjected to rigorous testing using a dedicated electrical motor test setup. Comparative results demonstrated a significant improvement in efficiency for the ER-PMSM over the IR-PMSM, with the efficiency increasing from 72.5% to 84.67% at nominal operating conditions.
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    External rotor gearless elevator machine: a new design with flanged shaft
    (Springer Science and Business Media B.V., 2024) Soyaslan, Mucahit; Eldogan, Osman; Fenercioglu, Ahmet; Avsar, Yusuf
    The design of an external rotor gearless elevator machine (ERGEM) with a flanged shaft for elevator traction systems is presented in this paper. The machine is designed with two distinct shafts. The fixed shaft with stator is one, and the flanged shaft turns with the rotor is the other. The ERGEM's rotational movement has been reduced to a flanged shaft, and a novel motor design has been obtained that fits the market's traction pulleys and brake mechanisms. The flanged shaft provides traction by rotating with the pulley. Instead of making grooves on the rotor surface, an external pulley is used. The loads on the pulley have a negligible effect on the rotor because it is located between two fixing plates. With the plates on the right and left sides of the pulley, a symmetrical load distribution has been achieved. Finite element analyses (FEA) were performed using the maximum static load values. After the final design was approved, the prototype was built and experimental tests were conducted. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023.