Switched Reluctance Motor의 자기적 구조에 대한 비교 해석

오석규,Oh, Seok-Gyu 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.1

SRM is designed to meet operating standards such as low cost, simple magnetic structure, a desired operating speed range, high efficiency, high performance, and good matching for DC power. The magnetic flux of SRM is independent of its direction to develop a torque and it allows the flexible characteristics of the magnetic structure for SRM. In this paper, SRM can widely classify two types, Radial-Flux SRM and Axial-Flux SRM, according to the flux direction. Radial-Flux SRM includes Conventional, Segmented stator and rotor, and Double stator SRM, etc. and Axial-Flux SRM includes C-core stator and the Axial-airgap SRM. This paper is subjected the basic characteristics to select the best of the magnetic structure of SRM in the appropriate application by the classification of SRM. SRM은 저비용, 간단한 자기구조, 넓은 운전속도, 높은 효율, 직류전원과의 우수한 결합성 등의 장점을 가진 전동기구이다. SRM의 토오크는 자속의 방향과는 무관하여 자기구조의 배치가 유연한 특성을 가지고 있어 다양한 자기구조를 가지고 있다. 본 논문에서는 자속방향에 따라 Radial-Flux SRM와 Axial-Flux SRM로 크게 나누었고 기계적인 구조의 차이에 따라 Radial-Flux SRM에는 Conventional, Segmented stator and rotor, Double stator SRM 로, 그리고 Axial-Flux SRM에는 C-core stator와 Axial-airgap SRM로 분류하였고 각각에 대해 비교 해석하여 적절한 용도에 최적의 자기구조를 선택할 수 있도록 각각의 기본적인 특성을 제시하였다.

기어의 생산자동화를 위한 기어의 위치정보 검출에 관한 연구

오석규,Oh, Seok-Gyu 한국정보통신학회 2014 한국정보통신학회논문지 Vol.18 No.9

실린더형 강재의 양 끝에 기어를 갖는 기어 축은 자동차 동력전달 장치의 부품으로 널리 사용되고 있다. 기어 축을 가공하는 순서는 먼저 실린더 모양 강재의 한 쪽을 공작기계의 척에 물리고 다른 쪽을 기어로 가공한 다음, 기어로 가공된 쪽을 기어 모양 척에 끼워 물리고 가공되지 않은 쪽을 가공하는 순서로 진행된다. 이 공정이 자동화되기 위해서는 한 쪽에 기어를 가공한 상태에서 다른 쪽을 가공하려 할 때 가공된 쪽과 가공되지 않은 쪽 판별과 기어 모양 척에 정확히 기어로 가공된 강재를 끼우는 작업의 자동화가 선행되어야 한다. 이에 본 연구에서는 기어 축에서 기어의 위치와 기어의 각도를 검지하기 위하여 자속의 검출을 활용하는 자기 검출 센서를 제안하였고 제안된 센서의 설계를 위해 자기장 해석을 유한요소방법(FEM)으로 수행하였다. Available shafts with gears at each end of the cylinder-shaped steel are widely used as power train components for automobiles. In order to automate the production of a geared shaft, there are problems to be solved. After one side of the cylinder is cut in gears, one of the problems is to determine the position of the cylinder which has been already cut. The shaft is then to be fed ahead with geared position to the chuck with jaws in geared shape. The other problem is to acquire information on an angular position of the shaft to fit to the jaws of the chuck. This paper deals with the magnetic detection sensor of gear position. Coils are installed in two places. Self-inductances of coils are detected by the changes of reluctance and are then compared. The magnetic analysis also has been carried out by the finite element analysis (FEM).

Flexible Control Scheme of Switched Reluctance Motor Drives by PLL Control

吳錫奎(Seok-Gyu Oh),黃煐文(Young-Moon Hwang) 대한전기학회 1997 전기학회논문지 Vol.46 No.7

변형된 Bifilar 권선을 갖는 TPHRM의 해석

오석규(Seok-Gyu Oh) 한국자기학회 2024 韓國磁氣學會誌 Vol.34 No.2

중소형 전동기기에서 전동기시스템의 성능뿐만아니라 가격경쟁력도 중요하기 때문에 단상, 혹은 2상 전동기시스템은 중소형 전동기기에 적합하다. 그중 TPHRM(Two Phase Hybrid Reluctance Motor)는 기존의 SRM에 영구자석을 추가하여 성능을 향상시켰지만 영구자석의 추가로 비용이 상승하여 인버터에서 비용을 절감하여 전체 전동기시스템의 가격경쟁력을 확보하는 것이 중요하다. 본 논문은 TPHRM에 bifilar inverter의 변형된 bifilar 권선을 제안하였다. Bifilar inverter는 전력스위치 소자가 가장 적은 인버터로 장점이 있지만, 슬롯에 bifilar 권선을 감아야 해서 권선을 감는 공간의 제약을 받고 전력밀도가 낮은 단점을 가지고 있다. 제안한 bifilar 권선은 감자를 위한 권선을 별도의 공간에 감아 여자를 위한 주권선의 공간을 확보함으로써 전력밀도가 낮아지는 단점을 해결하였다. Because both the motor system’s performance and price competitiveness are essential in small and medium-sized electric devices, single-phase or two-phase electric motor systems are suitable. Among them, TPHRM (Two Phase Hybrid Reluctance Motor) improves performance by adding permanent magnets to the SRM, but the cost increases due to the addition of permanent magnets, so this is complemented by reducing costs in the inverter to secure price competitiveness of the entire electric motor system. This paper proposes a modified bifilar winding of the bifilar inverter to TPHRM. The advantage of the bifilar inverter is that it has the fewest power switch elements. However, it is not used in large electric motor systems due to the limited slot for the winding. The proposed bifilar winding solved the disadvantage of low power density by securing space for the primary winding for excitation by winding the winding in a separate space.

SRM의 최적운전을 위한 스위칭각 선정에 관한 연구

오석규(Seok-Gyu Oh),이상훈(Sang-Hoon Lee),김창섭(Chang-Sub Kim),안진우(Jin-Woo Ahn) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7

The torque of SRM depends on phase current and the derivative of inductance. But the inductance of SRM is nonlinearly changed according to rotor position angle and phase current because of saturation in magnetic circuit. Therefore this has a concern in torque ripple and speed variation, and it is difficult to control the desired torque The torque of SRM depends on phase current and the derivative of inductance. But the inductance of SRM is nonlinearly changed according to rotor position angle and phase current because of saturation in magnetic circuit, and it is difficult to control the desired torque.<br/> This paper proposes an optimization control scheme by adjusting both the turn-on and turn-off angle according to high efficiency points which are simulated by GA-Neural Network, which is used to simulate the reasonable switching angle which is nonlinearly varied with rotor speed and load.

GA-신경회로망을 이용한 SRM의 최적운전조건에 대한 연구

오석규(Seok-Gyu Oh),김창섭(Chang-Sub Kim),안진우(JIn-Woo Ahn) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11

he torque of SRM depends on phase current and the derivative of inductance. But the inductance of SRM is nonlinearly changed according to rotor position angle and phase current because of saturation in magnetic circuit, and it is difficult to control the desired torque. This paper proposes optimal driving condition using GA -Neural Network that is used to simulate the reasonable switching angle which is nonlinearly varied with rotor speed and load

자기동이 가능한 2상 SRM에 관한 연구

오석규(Seok-Gyu Oh) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-

SRM drive systems are designed to meet operating standards such as low cost, constant torque independent of rotor position, a desired operating speed range, high efficiency, and high performance. In applications using small motors, low cost and high performance with self-starting capabilities are highly desired. This paper discusses a novel two phase SRM (TPSRM) that has high performance characteristics with self-starting capability, low manufacturing cost with a two phase inverter and simple magnetic structure, and high efficiency. The principle of operation, analysis, and simulation for design are presented. The machine design is verified using finite element analysis (FEA) software. Analysis and simulation results are given to validate the TPSRM design.

전력각 제어 개념을 도입한 SRM드라이브의 운전방식에 관한 연구

吳錫奎(Seok-Gyu Oh),鄭泰旭(Tae-Uk Jung),安珍雨(Jin-Woo Ahn),黃煐文(Young-Moon Hwang) 대한전기학회 1997 전기학회논문지 Vol.46 No.1

SRM의 진동ㆍ소음의 저감을 위한 직류여자 전류방식에 관한 연구

오석규(Seok-Gyu Oh),추영배(Young-Bae Choo),이일천(II-Chen Lee),황영문(Young-Moon Hwang) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7

SRM drives generate large vibration and acoustic noise because it is commutated individually by step pulse m.m.f on each phase pole, The frequency or motor speed of peak vibrations and acoustic noises is coincided with the natural resonant frequency of the magnetic structure and frame material And this radial vibration force is induced on the phase commutation region. This paper suggest the new electromagnetic structure of SRM with auxiliary commutating winding excited d.c e m.f This phase- commutating winding is coupled magnetically between one phase winding and the other, In this commutation mechanism, the vibrating force is failed down, As a result, SRM with d.c exciting commutation winding is very useful to reduce vibration and acoustic noise of SRM drive,

2상 SRM의 비교에 관한 연구

오석규(Seok-Gyu Oh),이치우(Chee-Woo Lee) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.1

In small-power applications, variable-speed motors having high efficiency and controllability become more dominant than brushed DC motors. BLDC motors with permanent magnets in the rotor and SRMs directed by reluctance torque due to no permanent magnets have been strongly studied as a candidate. Compared to the BLDC motors, SRMs are more suitable for low-cost applications since the magnetic structure is simple, mechanically robust, and cheap due to no additional excitation in the rotor such as copper wire, aluminum, and permanent magnets. In addition, relatively small number of phases in single and two-phase SRMs allows more cost savings with regards to material in the motor and switching devices in the converter. In this paper, several 2 phase SRMs are compared to a 3 phase 6/4 SRM in terms of flux distribution in key parts of the motors.