연구홍보포털

논문 초록 (Abstract)

Background/Objectives: Synchronous Reluctance Motor for electric vehicle have torque ripple affecting vibration noise which is related user convenience. Methods/Statistical analysis: Synchronous reluctance motors without permanent magnets do not have permanent magnets inside the rotor. Moreover, the rotor has a complex structure with many segments and barriers. Therefore, parameters that affect the inner shape of the rotor were selected. This paper represents that how the magnitude of torque ripple changes as the set design parameters are changed, and carry out electromagnetic field analysis through 2D Finite Elements Method. Findings: Synchronous reluctance motors without permanent magnets do not have permanent magnets inside the rotor and have a structurally complex structure. Therefore, design parameters that affect the motor characteristics were selected according to the shape of the inside of the rotor. Analyze how the magnitude of torque ripple changes as the set design parameters are changed, and conduct electromagnetic field analysis through FEM analysis. The design parameters such as barrier, segment thickness, segment angle are varying to analyze the motor characteristic, especially torque ripple. Additionally, by changing the design of rotor structure, motor characteristic can be represented like field flux density, flux path. Small barrier thickness and segment thickness are saturated the part of rotor interrupting the flux flow and it will make the inductance saturation. Also, the influence of inductance which changes as changing the parameter must be analyzed. In this paper, the optimal design parameter, to make minimum torque ripple, is represented. Improvements/Applications: By structurally changing the shape, the users convenience is improved through the optimal rotor structure with minimum torque ripple.