• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.28 no.5
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• pp.92-97
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• 2014

The SRM is a doubly salient, singly excited machine. The torque is developed by the tendency for the magnetic circuit to adopt a configuration of minimum reluctance, i.e. for the rotor to move into in line with the stator poles and to maximize the inductance of the coils excited. It is common practice to combine them into groups of poles which are excited simultaneously; for example, 8/6 SRM (8 stator poles and 6 rotor poles) for 4 phases, 6/4, 12/8 SRM for 3 phases, 4/2, 6/3 SRM for 2 phases. Small number of phases in two-phase SRMs allows more cost savings with regards to the switching devices in the converter. The stator back irons of two phase 6/3 SRM and C-core 4/3 SRM does not experience any flux reversal as the flux is in the same direction whether phase A or B is excited. In this study, the similarities, the differences, and structural characteristics between the two SRMs was studied, The magnetic analysis also has been carried out by the finite element method analysis (FEM).

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.28 no.5
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• pp.115-121
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• 2014

The intrinsic simplicity, ruggedness, and simple power electronic drive requirement of a Switched Reluctance Motor(SRM) make it possible to use in many commercial adjustable speed application. The simple magnetic circuit results in a high efficiency drive and low temperature rise, and the drive system provides a good drive characteristics. This paper is provides two phase 4/3 SRM that is similar to two phase 6/3 SRM as aspect to magnetic structure. Although 6/3 SRM does not experience any flux reversal as the flux is in the same direction whether phase A or B is excited, but two phase 4/3 SRM experiences a flux reversal in small part of stator yoke. The flux reversal in two phase 4/3 SRM could be relieved by an adjustment of stator yoke structure. The magnetic analysis and design considerations of the two phase 4/3 SRM have been obtained by the finite element method analysis (FEM).

• Proceedings of the KIPE Conference
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• 2017.11a
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• pp.201-202
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• 2017

스위치드 릴럭턴스 전동기(Switched Reluctance Motor, 이하 SRM)은 간단한 구조와 기계적 강인성, 넓은 속도 범위를 사용할 수 있다는 장점이 있다. 하지만, SRM을 산업분야에 적용하기 위해서는 각각의 설계 변수에 따른 성능 변화에 대한 연구가 부족한 실정이며, 기기의 소형화에 대한 연구가 진행되어지고 있다. 본 논문에서는 2상 4/2극 SRM과 3상 6/4 SRM을 설계 하며, 2상 4/2극 SRM의 경우 스테퍼 회전자의 극호각과 스테퍼의 높이를 변수로 지정하여 성능을 확인하며, 3상 6/4극 SRM의 경우 2상 4/2 SRM 전동기 대비 기기의 소형화를 중점으로 설계 및 특성 해석을 수행하였다.

• The Transactions of the Korean Institute of Power Electronics
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• v.8 no.1
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• pp.48-55
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• 2003

The design and analysis of a three-phase 6/8 structure SRM(switched reluctance motor) art described. The range of the stator ole arc and the rotor pole arc of the motor we analyzed in the linear region. The optimum range of the stator pole arc and the turn-off angle of the main switches in the power converter are given with the 2-D finite element electro-magnetic field calculation of the motor and the nonlinear simulation. Test results of the prototype are discussed. This type is good for high efficiency drive because the drive circuit is simple and current density and copper loss of the winding are law.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.2
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• pp.315-322
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• 2017

This study presents a novel two­phase eight stator poles and six rotor poles (8/6) switched reluctance machine (SRM) that can compensate for the vibration and noise problems of two­phase 6/3 SRM and compare the characteristics of two SRMs. In the case of two­phase 6/3 SRM, the short flux path and the flux direction inside the stator are not reversed, so they have high efficiency characteristics. However, the use of three rotor poles causes problems of vibration and noise because the radial force applied to the rotor poles is not balance. The proposed two­phase 8/6 SRM has advantages of 6/3 SRM such as the flux­reversal­free stator and it can improve vibration and noise by using six rotor poles due to balanced radial force acting on the rotor poles. In order to make a reasonable comparison between two SRMs, the electromagnetic field structure of 8/6 SRM is designed to have equivalent torque characteristic to 6/3 SRM and then the copper loss and core loss are compared and analyzed. Finally, we compare the effieicney of two SRMs using finite element analysis and compare the distribution of radial force acting on the rotor poles based on Maxwell's stress method.

• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.533-534
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• 2011

본 논문은 고속블로워 시스템용 2상 4/2 SRM(Switched Reluctance Motor)과 3상 6/2 SRM의 토크 리플 최소화를 위한 가변 공극형 회전자 타입을 제안하고 그에 대한 특성 해석을 수행하였다. 연속적인 토크를 얻기 위하여 정 토크 구간을 확장할 수 있는 형상을 적용하고 고속에서의 리플을 최적화 할 수 있는 가벼 공극형 구조를 제안하였다. 기존에 제안되어진 2상 고속 4/2 SRM의 특성과 제안된 3상 고속 6/2 SRM의 특성을 FEM(Finite Elements Method) 해석을 통하여 비교해봄으로 고속에서의 개선된 토크 리플을 검증하였다.

• The Transactions of the Korean Institute of Electrical Engineers B
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• v.53 no.4
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• pp.224-228
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• 2004

The switched reluctance motor(SRM) drive system provides a good adjustable speed and torque characteristics. SRM has the possibility of maintaining full power over a wide speed range. So, many attempts are being done from home appliances to industrial machinery and tools. Especially, the traction drive of SRM is one of a good application due to it's torque characteristics. However, because of the switching mechanism, it has some disadvantage of noise and vibration. It is difficult to adopt to an appliance demanding silence. A noise simulations and test of 3-phase 6/4, 6/8 and 12/8 SRM were done in other to compare each other. The test results show that 12/8 SRM has good noise characteristics.

• The Transactions of the Korean Institute of Power Electronics
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• v.10 no.6
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• pp.569-577
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• 2005

In this paper, a new control scheme to use 6-switch IGBI module for 3-phase switched reluctance motors(SRM) is proposed. Compared with the conventional asymmetric bridge converter topology, it can minimize the entire system size and cost. Therefore, it may have a new topology lot SRM to compare the other ac motors, such as induction motors, brushless dc motors, and so on. The validity of the proposed method is verified by simulation, and experimental results.

• Proceedings of the KIEE Conference
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• 2002.04a
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• pp.93-95
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• 2002

본 논문은 3상 6/8 SRM에 대한 회전자와 고정자의 구조, 회전자 위치 검출, 인버터의 특성에 관한 연구이다. 또한 선형구간에서의 고정자 극호 상수와 회전자 극호 상수의 범위에 대해 해석하였다. 그리고 이를 2D FEM 해석을 통하여 최적의 고정자 극호 상수와 주스위치의 최적 스위치 오프각을 해석하였다. 또한 시작기의 제작을 통하여 실험으로 해석결과를 입증하였다.

• Journal of Integrative Natural Science
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• v.11 no.2
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• pp.121-129
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• 2018

CXCR6 is a major target in drug design as it is a determinant receptor in many diseases like AIDS, Type I Diabetes, some cancer types, atherosclerosis, tumor formation, liver disease and steatohepatitis. In this study, we propose the active site residues of CXCR6 molecule. We employed homology modelling and molecular docking approach to generate the 3D structure for CXCR6 and to explore its interaction between the antagonists and agonists. 3D models were generated using 14 different templates having high sequence identity with CXCR6. Surflex docking studies using pyridine and pyrimidine derivatives enabled the analysis of the binding site and finding of the important residues involved in binding. 3D structure of CXCL16, a natural ligand for CXCR6, was modelled using PHYRE and protein - protein docking was performed using ClusPro. The residues which were found to be crucial in interaction with the ligand are THR110, PHE113, TYR114, GLN160, GLN195, CYS251 and SER255. This study can be used as a guide for therapeutic studies of human CXCR6.