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서정무(Seo, Jungmoo),김영균(Kim, Youngkyun),김주한(Kim, JooHan),구본관(Gu, Bongwan),정인성(Jung, Insoung) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
본 논문은 상용차용 전동 쿨링팬 모듈의 개발을 위한 5kW급 브러시리스 DC 전동기에 관하여 기술한다. 개발 대상전동기는 정격 3,000rpm의 회전속도를 목표로, 기존 팬 쉬라우드에 장착 가능한 박형으로 설계되며, 코깅토크 저감을 위한 회전자와 고정자 형상 최적화를 수행하여, 구동시 소음과 진동을 감소시키고자 하였다. 전동기를 제작하여 입출력 특성을 분석하고, 최종적으로 기 개발된 팬 블레이드와 결합하여, 쿨링팬 시스템의 유량 및 유압 특성시험을 진행하였다.
농용 다목적 차량용 영구자석 전동기의 설계에 관한 연구
서정무(Jungmoo Seo),김정환(Junghwan Kim),김영균(Youngkyun Kim),정인성(Insoung Jung),정현교(HyunKyo Jung) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
This paper presents a design of permanent magnet synchronous motor for agricultural utility vehicle. Based on the output characteristics of conventional diesel vehicle, required speed and torque are derived and motor specification is determined. In order to evaluate demagnetization behavior in driving condition, operating points of permanent magnet at a critical point are evaluated using magnetic field and flux density calculation. The manufactured motor is tested and compared with the simulated results.
축방향 자속형 영구자석(AFPM) 전동기 냉각 유로 격벽 구조에 대한 방열 특성 해석
양성진(Sungjin Yang),신용우(Yong-Woo Shin),서정무(Jungmoo Seo),손기헌(Gihun Son) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
As part of the low-carbonization that appears throughout the industry, the electrification of the conventional fossil fuel system is actively underway in the aviation propulsion. For electric propulsion for aviation, it is necessary to design and manufacture a motor with improved power density that can operate at low speed and high torque. The high heat loss that inevitably occurs in the process of pursuing high output and weight reduction requires the development of an improved cooling structure as well. The AFPM motor, which is the subject of this study, adopted a hybrid cooling method that has both air cooling and water cooling structures to effectively dissipate heat generated at the increased power density. For effective heat dissipation of the internal active parts, a partition structure was considered inside the hub having a complex coolant flow passage, and the cooling performance was investigated numerically. The purpose of this study is to suggest an appropriate cooling design direction by comparing and analyzing the change in coolant flow rate, pressure drop, and temperature change of major motor components by changing the internal partition structure of cooling passage under the same cooling flow rate.
150kW 급 모터의 운전점 변화에 따른 영구자석 포화 온도의 수치적 영향도 분석
신용우(Yongwoo Shin),양성진(Sungjin Yang),서정무(Jungmoo Seo) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.8
The temperature rising of the motor during the operation is the major factor which directly affects the efficiency of the generator as well as the safety. Therefore, to maintain a stable operation under the rated operation, it should be analyzed in advance whether the saturated temperature of the motor can satisfy thermal constraints of major components, such as coils. In general, the motor’s operating point is defined as torque and frequency, and the iron loss and the copper loss are determined which affect the motor’s saturation temperature under that condition. Accordingly, in this paper, we construct a saturated temperature prediction model by using the simulation results which is calculated on various operation points, and validate the correctness of the prediction model.