http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
센서리스 구동 방식을 이용한 BLDC 전동기의 토크리플 저감에 관한 연구
문지우(Ji-Woo Moon),이인재(In-Jae Lee),김병국(Byong-Kuk Kim),조윤현(Yun-Hyun Cho) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
BLDC(Brushless DC) 전동기는 브러시(brush) 방식 DC 전동기의 브러시와 정류자를 반도체 소자를 이용한 인버터로 대체한 것으로 높은 효율과 제어의 용이성 때문에 최근 많이 사용되고 있다. 하지만 회전자의 위치 정보에 의해 정류를 하므로 회전자 위치 센서가 필요하고 그에 따라 전동기의 구조가 복잡하게 되고 작동 환경에 제한을 받게 된다. 본 논문에서는 위치 센서 없이 고정자의 권선에 유기되는 역기전력을 이용한 센서리스(sensorless) BLDC 전동기의 토크리플 저감에 대하여 연구하였다. BLDC 전동기를 수학적으로 모델링하여 센서리스 BLDC 전동기의 토크리플 제어 알고리즘을 구성하고 시뮬레이션과 실험을 통하여 그 결과를 검토하였다. 또한 기존 센서 부착형 BLDC 전동기와 비교하여 그 타당성을 입증하였다.
공심슬롯 원통형 선형 BLDC 전동기의 설계 및 특성 고찰
文智虞(Ji-Woo Moon),曺允鉉(Yun-Hyun Cho) 대한전기학회 2008 전기학회논문지 Vol.57 No.4
Slotless linear brushless DC motor are widely used in precision machine applications because of their advantages such as low of detent force, negligible iron loss. But they have a disadvantage such as low thrust density, thrust ripple, and excessive use of permanent magnet materials. These lead to undesirable performance and high production cost. In this paper, we deal with the design and characteristics investigation of a air-core tubular linear brushless DC (TLBLDC) motor with air-core stator and permanent magnet mover. And to investigate the static and dynamic characteristics of air-core TLBLDC motor, the prototype machine is manufactured and analyzed by F.E.M. and Matlab simulink simulations. Especially, dynamic characteristics of air-core TLBLDC motor driven with 6 step inverter are simulated by F.E.M.coupling with external circuit and Matlab simulink program, and measured for the prototype motor. The simulation results are compared to the experimental results such as current waves, thrust and speed curve.
전류 전환각에 따른 BLDC 전동기의 토크 리플 특성 해석
이인재(In-Jae Lee),문지우(Ji-Woo Moon),김병국(Byong-Kuk Kim),한성진(Sung-Jin Han),조윤현(Yun-Hyun Cho) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this paper, analysis of BLDC motor torque ripple characteristic according to current commutation angle. The ideal rectangular current wave and the trapezoidal current wave by current commutation angle and BLDC back-EMF are analyzed mathematically using Fourier series. Moreover, the simulation is performed by Matlab/simulink to compare with experiment results and analyze BLDC motor characteristics.
金炳國(Byong-Kuk Kim),文智虞(Ji-Woo Moon),金美廷(Mi-Jung Kim),李秉俊(Byung-Jun Lee),曺允鉉(Yun-Hyun Cho) 대한전기학회 2007 전기학회논문지 Vol.56 No.8
The line-start permanent magnet synchronous motor has a high efficiency and an advantage in constant speed operation regardless of the effect of load variation. However, it is difficult to predict the performance of characteristics accurately, because of the unbalanced starting torque with the initial starting position of the rotor and the generation of a break torque. In this paper the dynamic characteristics of the line-start permanent magnet synchronous motor are described and compared with those of the squirrel-cage induction motor through the simulation to find the characteristics of the permanent magnets and the rotor bars in the line-start permanent magnet synchronous motor. Finally this paper gives the comparison between the simulation results and the experimental results.
FPD 공정용 Glass 이송 시스템을 위한 자기부상 EMS의 개발
이기창(Ki-Chang Lee),문지우(Ji-Woo Moon),구대현(Dae-Hyun Koo),이민철(Min-Cheol Lee) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.6
In recent semiconductor and FPD (Flat Panel Display) manufacturing processes, high clean-class delivery operation is required more and more for short working time and better product quality. Traditionally SLIM (Single-sided Linear Induction Motor) is widely used in the liner drive applications because of its simplicity in the rail structure. A magnetically levitated (Maglev) unmanned vehicle with SLIM traction, which is powered by a CPS (Contactless Power Supply) can be a high precision delivery solution for this industry. In this paper unmanned FPD-carrying vehicle, which can levitate without contacting the rail structure, is suggested for high clean-class FPD delivery applications. It can be more acceptable for the complex facilities composed with many processes which require longer rails, because of simple rail structure. The test setup consists of a test vehicle and a rounded rail, in which the vehicle can load and unload products at arbitrary position commanded through wireless communications of host computer. The experimental results show that the suggested vehicle and rail have reasonable traction servo and robust electromagnetic suspensions without any contact. The resolution of point servo errors in the SLIM traction system is accomplished under 1mm. The maximum gap error is ±0.25mm with nominal air gap length of 4.0mm in the electromagnetic suspensions. This type of automated delivery vehicle is expected to have significant role in the clean delivery like FPD glass delivery.
펌프용 SRM의 Sensorless 구동방식에 관한 연구
손동혁(DongHyeok Son),문지우(Ji-Woo Moon),조윤현(Yun-Hyun Cho) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.4
In recent years, the switched reluctance motor have been used many industrial alpplication because of its cost advantage. SRM drivers are accomplished by switching the phase currents on and off synchronously with the rotor position which is fed back to the controller by position may deteriorate in harsh environments and increase the size and cost of the SRM drive system. This paper proposes a position sensorless method that is based on impressed pulse voltage using impressed at unenergised phases to estimate the rotor position. The current value by impressed pulse voltage compare with the threshold value. The rotor position can be estimated by observing the current value. Finally, simulation results compare with the sensor type SRM and confirm the proposed method to be useful.