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축방향 자속형 영구자석 BLDC 전동기의 코깅 토크 저감에 관한 연구
曺元榮(Won-Young Jo),李仁宰(In-Jae Lee),曺允鉉(Yun-Hyun Cho),具大鉉(Dae-Hyun Koo),全衍度(Yon-Do Chun) 대한전기학회 2006 전기학회논문지 B Vol.55 No.9
Cogging torque, the primary ripple component in the torque generated by permanent magnet (PM) motors, is due to the slotting on the stator or rotor. This article shows the reduction of cogging torque in a novel axial flux permanent magnet (AFPM) motor through the various design schemes. 3D finite element method is used for the exact magnetic field analysis. The effects of slot shapes and skewing of slot on the cogging torque and the average torque have been investigated in detail.
양영균 ( Young Kyun Yang ),남우창 ( U Chang Nam ),조원영 ( Won Young Jo ),최성 ( Sung Choi ),이수영 ( Suw Young Ly ) 한국전시산업융합연구원 2015 한국과학예술융합학회 Vol.21 No.-
Neuro computer interfacing (design) is related to augmented brain computer interfacing and body control, for this purpose, neuro signals of chrono amperometric in vivo assay was searched using forehead cutis with electrochemical three electrode systems of copper film with a 5 mm diameter circle electrode (CUE) by cyclic voltammetry and chrono amperometric comparison with existing method, which diagnostic potentials of coronometric sensitivity and electrode properties were optimized· Developed results were applied to feeling sensing assay, character recognition, and thinking signals·
Character recognition via neurometric thinking current
Yang, Young Kyun(양영균),Nam, U Chang(남우창),Jo, Won Young(조원영),Choi, Sung(최성),Ly, Suw Young(이수영) 한국전시산업융합연구원 2015 한국과학예술융합학회 Vol.21 No.-
Neuro computer interfacing (design) is related to augmented brain computer interfacing and body control, for this purpose, neuro signals of chrono amperometric in vivo assay was searched using forehead cutis with electrochemical three electrode systems of copper film with a 5 mm diameter circle electrode (CUE) by cyclic voltammetry and chrono amperometric comparison with existing method, which diagnostic potentials of coronometric sensitivity and electrode properties were optimized. Developed results were applied to feeling sensing assay, character recognition, and thinking signals.
김미정(Mi-Jung Kim),김병국(Byong-Kuk Kim),조원영(Won-Young Jo),조윤현(Yun-Hyun Cho),황돈하(Don-Ha Hwang),강동식(Dong-Sik Kang) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.4
This paper describes the effects of air gap eccentricity in induction machines. Asymmetric electro-magnetic force caused by the frictional worn bearing, rotor misalignment and unbalanced rotor etc. generates an asymmetrical operation, vibration and electro-magnetic noise. The need for detection of these rotor eccentricities has pushed the development of monitoring methods with increasing sensitivity and noise immunity. In this paper, we focus on investigating the asymmetrical operation considering of unbalanced magnetic force In squirrel-cage induction motor with 380 [V], 7.5 [㎾], 4P, 1,768 [rpm]. The effects of the rotor eccentricity, magnetic force are investigated by finite element method (FEM).
황돈하(Don-Ha Hwang),이기창(Ki-Chang Lee),강동식(Dong-Sik Kang),김병국(Byong-Kuk Kim),조원영(Won-Young Jo),조윤현(Yun-Hyun Cho) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.4
A down-scaled simulator is developed to simulate typical faults in induction motor such as short-tum stator winding, broken rotor bar, dynamic and static air-gap eccentricity, bearing trouble, and mechanical unbalance. The simulator is used as an initial builder to develop design algorithm for real-time faults detecting system by processing an abnormal signal and characteristics in each fault.