Hyun-Woo Jun


3 Study on the Retaining Sleeve Structure for the Reduction of Eddy Current in SPMSM

Authors: Ju Lee, Hyun-Woo Jun, Dong-Woo Kang, In-Gun Kim, Hyun Seok Hong


In high-speed SPMSM design, the rotor-retaining sleeve is inserted into rotor to prevent permanent magnet’s damage. It is quite efficient way considering manufacturability, but the sleeve becomes major source of ohm loss in high-speed operation. In this paper, the high-speed motor for turbo-blower at the rating of 100kW was introduced. To improve its efficiency, the retaining sleeve’s optimal design was needed. Within the range of satisfies the mechanical safety, sleeve’s some design variables have been changed. The effect of changing design variables of the sleeve was studied. This paper presents the optimized sleeve’s advantages in electrical efficiency from the result of electromagnetic FEA (finite element analysis) software. Finally, it suggests the optimal sleeve design to reduce eddy current loss, which is related to motor shape.

Keywords: eddy current, high efficiency, SPMSM, sleeve

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2 ELectromagnetic-Thermal Coupled Analysis of PMSM with Cooling Channel

Authors: Huai-Cong Liu, Ju Lee, Tae-Chul Jeong, Hyun-Woo Jun


The paper presents the electromagnetic-thermal flow coupled analysis of permanent magnet synchronous motor (PMSM) which has cooling channel in stator core for forced air cooling. Unlike the general PMSM design, to achieve ohmic loss reduction for high efficiency, cooling channel actively used in the stator core. Equivalent thermal network model was made to analyze the effect of the formation of the additional flow path in the core. According to the shape and position changing of the channel design, electromagnetic-thermal coupled analysis results were reviewed.

Keywords: fluid flow, Coupled problems, Thermal analysis, Electric Motors, Equivalent Circuits

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1 Optimal Rotor Design of an 150kW-Class IPMSM through the 3D Voltage-Inductance Map Analysis Method

Authors: Ju Lee, Tae-Chul Jeong, Eung-Seok Park, Hyun-Jong Park, Hyun-Woo Jun, Dong-Woo Kang


This presents a methodology to determine detail design directions of an 150kW-class IPMSM (interior permanent magnet synchronous motor) and its detail design. The basic design of the stator and rotor was conducted. After dividing the designed models into the best cases and the worst cases based on rotor shape parameters, Sensitivity analysis and 3D Voltage-Inductance Map (3D EL-Map) parameters were analyzed. Then, the design direction for the final model was predicted. Based on the prediction, the final model was extracted with Trend analysis. Lastly, the final model was validated with experiments.

Keywords: Optimal Design, PMSM, rotor design, voltage-inductance map

Procedia PDF Downloads 449