http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이진국(Zhen-Guo Lee),이동희(Dong-Hee Lee),안진우(Jin-Woo Ahn) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.4
The direct instantaneous torque control (DITC) method is presented in this paper, which enables torque to be generated during all region and instantaneous torque control to be possible. The hysteresis control mode with the compared value between given torque and instantaneous output torque as input is applied in respect region. The output torque function, that is instantaneous output torque with the variation of current and position of rotor, is achieved by experiment. In this control mode the torque subsection function and current control are not needed. The tum on angle with variation of load torque and speed is only selected and tum off angle can be neglected. The validity of method is tested by simulation and experiment.
토크리플 저감과 역률개선을 동시에 고려한 단상 SRM의 구동
이진국(Zhen-Guo Lee),Jianing Liang,이동희(Dong-Hee Lee),안진우(Jin-Woo Ahn) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper proposed a novel torque reduction strategy of single-phase SRM drive with PFC. The proposed PFC SRM drive has one additional active switch in the conventional asymmetric inverter. In order to get a high power factor, the source current is controlled sinusoidal, and additional excitation current is added from charge capacitor due to torque ripple reduction. The switching period of source and charged voltage are controlled properly to get higher power factor and torque ripple reduction. The validity of the proposed strategy is discussed through the theory analysis of mathematical modeling, some simulation and experiment results.
호이스트 견인용 SRM의 스무딩 운전을 위한 DITC 기법
Huijun Wang,이진국(Zhen-Guo Lee),안영주(Young-Ju An),안진우(Jin-Woo Ahn) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The DITC of SRM for smooth hoist driving is presented in this paper. In the hoist system, the switched reluctance motor (SRM) is applied instead of induction motor because of high efficiency and good traction characteristic. In order to improve start -up and stop performance of hoist system, the smoothing operation sequence of SRM using DITC is proposed. According to the switching sequence and hysteric band, the instantaneous torque is controlled. Since, the proposed method uses only the tum-on angle depending on variation of load and speed, a simple DITC can be implemented. The validity is proved by simulation and experiment.
Improvement of DITC SRM with a Novel 4-level Converter
Jianing Liang,이진국(Zhen-Guo Lee),이동희(Dong-Hee Lee),안진우(Jin-Woo Ahn) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
This paper presents a direct instantaneous torque control (DITC) of Switched Reluctance Motor (SRM) with a novel 4-1evel converter to obtain smooth torque and dynamic performance improvement. The DITC method can reduce the high inherent torque ripple of SRM drive system, but driving efficiency and dynamic performance are somewhat low due to the slow excitation current build-up. Since the 4-level converter can obtain a addition high voltage to get fast excitation current and demagnetization current, so, it can improve dynamic performance easily. As a high performance SRM drive system with low torque ripple and high dynamic performance can be implemented. The validity of proposed method is verified by some computer simulations and comparative experiments.
DITC of SRM using 4-Level Converter
Jianing Liang,Zhen-Guo Lee(이진국),Dong-Hee Lee(이동희),Jin-Woo Ahn(안진우) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.4
This paper proposes a DITC(Direct Instantaneous Torque Control) of SRM (Switched Reluctance Motor) using a novel 4-level converter for smooth torque control and high efficiency. DITC of SRM is very useful for smooth torque control, but the driving efficiency is low due to advanced current that does not produce torque. For the high efficiency control of SRM, fast excitation and demagnetization of phase current are required. A novel 4-level converter and a new control scheme are present to improve the driving efficiency. The proposed DITC of SRM using 4-1evel converter is verified by computer simulation.