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표면부착 영구자석형 BLDC 모터의 고정자 Notch 형상에 대한 최적화 설계
소용대,김미정,김재혁,강동우 대한전기학회 2020 전기학회논문지 P Vol.69 No.4
In the case of motors (home appliances and automobiles) frequently used near people, low vibration and low noise characteristics are important. To improve this, it is necessary to minimize cogging torque that causes vibration and noise of the motor. In this paper, we analyze the cogging torque equation to analyze the factors that affect the generation of cogging torque, and explain the correlation between the stator notch shape and the factor that reduces the cogging torque using a magnetic-equivalent circuit. In order to maximize the reduction of cogging torque according to the notch shape of the stator and minimize the deterioration of the output characteristics, the size, angle, and number of the notch shape are set as parameters. The set variable derives the optimum point of the three variables using RSM (Response of Surface Method). Each derived variable is compared with the test measurement value of cogging torque through 2-D FEM (2 Dimension Finite Element Method) results and prototype production to verify the cogging torque reduction effect of the designed notch shape.
이근재,주연준,소용대,김남훈,이재성,좌용호,Lee Kun-Jae,Joo Yeon-Jun,So Yong-Dae,Kim Nam-Hoon,Lee Jai-Sung,Choa Yong-Ho 한국분말야금학회 2006 한국분말재료학회지 (KPMI) Vol.13 No.1
Through the volume change of Sn in a low-temperature phase transformation, the Sn nanopowder with high, purity, was fabricated by an economic and eco-friendly process. The fine cracks were spontaneously generated. in, Sn ingot, which was reduced to powders in the repetition of phase transformation. The Sn nanopowder with 50 run in size was obtained by the 24th repetitions of phase transformation by low-temperature and ultrasonic treatments. Also, the $SnO_2$ powder was fabricated by the oxidation of the produced Sn powder to the ingot and milled by the ultrasonic milling method. The $SnO_2$ nanopowder of 20 nm in size was fabricated after the milling for 180 h.
IPMSM의 영구자석 불가역 감자를 고려한 효율 개선 설계에 관한 연구
문주형,이동열,소용대,강동우 대한전기학회 2020 전기학회논문지 P Vol.69 No.4
Currently, in many fields of research for miniaturization and high efficiency of electronic parts are being conducted in order to reduce the weight and improve efficiency of electric vehicles. We redesigned the distributed winding model into the concentrated winding model. The purpose of this research is to reduce the weight of the motor by reducing the end coil, improving the operation efficiency at the low speed section and increase the output by changing the winding method. In order to solve irreversible demagnetization problem, this paper analyzes the rotor design parameters that are a major factor in the irreversible demagnetization and design the structure to improve them. Since then, we have implemented the loss reduction and efficiency improvement design through the optimization of the stator design parameters. To verify the reliability of the simulation results, load experiments using dynamo test bench were conducted and analyzed.