http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Taguchi method를 이용한 영구자석 모터의 자속 장벽 설계
양병렬(Byoung-yull Yang),박현각(Hyun-kag Park),황규윤(Kyu Yun Hwang),권병일(Byung-il Kwon) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
This paper proposes a novel flux barrier in q-axis of rotor in IPM type BLDC motor, The proposed flux barrier can reduce cogging torqeu and diminisg torque ripple by sinusoidal waveform distribution of flux generated in the permanent magnet. To determine the optimal shape of the novel flux barrier, we also propose a modified Taguchi method which considering multiple quality characteristics, such as cogging torque, average torque, and efficiency. The proposed design and method were analyzed by using the 20 finite element method (FEM). Results of the proposed model were compared with initial model.
Incidence of Hypertension in Korea: 5-Year Follow-up Study
이장훈,양동헌,박훈식,조용근,전재은,박위현,천병렬,신지연,신동훈,이경수,김기식,김권배,김영조,채성철,신동구,원규장,이형우,김혜순,이인규 대한의학회 2011 Journal of Korean medical science Vol.26 No.10
Limited data are available about the incidence of hypertension over the 5-yr in nonhypertensive subjects. The study subjects were 1,806 subjects enrolled in a rural area of Daegu, Korea for a cohort study from August to November 2003. Of them, 1,287 (71.3%)individuals had another examination 5 yr later. To estimate the incidence of hypertension,730 non-hypertensive individuals (265 males; mean age = 56.6 ± 11.1 yr-old) at baseline examination were analyzed in this study. Hypertension was defined as either a new diagnosis of hypertension or self-reports of newly initiated antihypertensive treatment;prehypertension was if the systolic blood pressure was 120-139 mmHg and/or diastolic blood pressure was 80-89 mmHg. During the 5-yr follow-up, 195 (26.7%) nonhypertensive individuals developed incident hypertension. The age-adjusted 5-yr incidence rates of hypertension were 22.9% (95% confidence interval [CI] = 19.9-29.0) in overall subjects, 22.2% (95% CI = 17.2-27.2) in men, and 24.3% (95% CI = 20.4-28.2) in women. The incidence rates of hypertension significantly increased with age. In the multivariate analysis, prehypertension (Odds ratio [OR] 2.25; P < 0.001) and older age (OR 2.26; P = 0.010) were independent predictors for incident hypertension. In this rapidly aging society, population-based preventive approach to decrease blood pressure,particularly in subjects with prehypertension, is needed to reduce hypertension.
저전압 대전류용 IPM type BLDC 전동기 설계 및 특성해석
윤근영,류세현,양병렬,권병일 韓國職業再活學會 2004 職業再活硏究 Vol. No.
This paper presents a design and characteristics analysis of interior permanent magnet (IPM) type BLDC motor for electric vehicle. In order to design of IPM type BLDC motor, surface mounted permanent magnet(SPM) type BLDC motor is used as the initial design model. According to the size of permanent magnet, the steady state characteristics is analysized by equivalent magnetic circuit method. The characteristics analysis results of the designed motor is compared with the experimental results.