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슬라이딩 모드 관측기를 이용한 3상 PWM 컨버터의 고역률 제어
양이우(Iee-Woo Yang),김명현(Myoung-Hyun Kim),김영석(Young-Seok Kim) 전력전자학회 1999 전력전자학술대회 논문집 Vol.- No.-
In this paper, the authors propose a current control system for three phase PWM AC/DC converter without the source voltage sensors, The sinusoidal input current and unity effective power factor are realised based on the estimated source voltage in the controller, The estimation of source voltage IS performed based on the sliding mode observer using the actual currents and the actual DC link voltage, The estimated source voltage is used to accomplish unity power factor.<br/> The proposed method is proved by simulations.
공기 동압 베어링을 갖는 디지털 라이트닝 프로세서 모터용 코어리스 및 슬롯리스 BLDC 모터의 특성 분석 및 비교
梁二宇(Iee-Woo Yang),金榮石(Young-Seok Kim),金尙郁(Sang-Uk Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.6
This paper presents the analysis for power consumption, mechanical vibration and acoustic noise characteristics of the Coreless and Slotless Brushless DC motor in Digital Lightening Processor(DLP) Motor with the Air-Dynamic Bearing. The Coreless BLDC motor has not the stator yoke as well as the stator slot to remove the unbalance force by the interaction between the stator yoke and Air-Dynamic Bearing clearance. The assembling tolerance and the processing error make the air-gap difference between the magnet and the stator yoke, which occurs the unbalanced electro-magnetic force in the Slotless BLDC motor. It imposes the air-dynamic bearing on the disturbance force and makes the Air-Dynamic Bearing vibrated and noised. Also, The attractive force between the magnet and the silicon steel stator yoke increases the power consumption. In this paper, the power consumption, mechanical vibration and acoustic noise of the Coreless BLDC motor and the Slotless BLDC motor with the silicon steel stator yoke are simulated, analyzed, and tested using the manufactured proto-type motors with Air-Dynamic bearing. The simulated and tested results present that the Coreless BLDC motor without the silicon steel stator yoke has the lower mechanical vibration and noise, and lower power consumption than the Slotless BLDC motor with the silicon steel stator yoke in Digital Lightening Processor Motor with Air-Dynamic Bearing.
스위치드 릴럭턴스 전동기 구동을 위한 새로운 공진형 컨버터
김정성(Jung-sung Kim),김현중(Hyun-joong Kim),양이우(Iee-woo Yang),김영석(Young-seok Kim) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
In order to obtain better performance for a SRM(switched reluctance motor) drive, the commutation from one phase to another must be as fast as possible. In this paper a novel converter for SRM drive is proposed, which can accelerate the turn-off and turn-on time by using two capacitors to form a resonant circuit with the motor inductance. Two capacitors recover rapidly stored energy in the off going phase and establish rapidly the current rising in the on going phase. As a result, the current tall can be shortened and the dwell angle in the positive torque region can be extended. And comparing with the asymmetric converter, this converter has higher energy availability m energy conversion process and less number of switches.<br/> <br/>