• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.2621-2625
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• 2007

This study aims at analyzing the flow characteristics of the electromagnetic pump using a linear induction motor (LIM) for transferring molten metals. The flow characteristics of the pump are simulated by magnetohydrodynamic(MHD) program. In this system, the LIM is used for transferring molten metal by electromagnetic force. The molten metal is treated as the secondary part of the LIM. Since the LIM produces an electromagnetic force in the duct, the molten metal can flow from the furnace to the reservoir. The flow characteristics of the pump are analyzed using MHD program for magnetic field of 0.1[T] in duct. In order to prove the analysis, we made a prototype electromagnetic pump using LIM.

• 조명전기설비학회논문지
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• 제21권6호
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• pp.65-70
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• 2007

본 논문에서는 선형유도전동기의 전자기력에 의해 용융 금속을 이송할 수 있는 전자기 펌프에 대하여 특성 해석 및 실험 결과에 대하여 제시하였다. 선형유도전동기에서 발생하는 전자기력과 전자수력학(MHD) 현상을 결합하여 용융 금속의 이송 특성을 해석하였다. 실험은 용융 아연을 대상으로 하였으며, 해석 결과와 비교 검토하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.161-163
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• 2006

This paper presents the experiment and the characteristics analysis of an electromagnetic pump using linear induction motor(LIM). The characteristics of LIM pump are analyzed solving the hydrodynamic equation at constant magnetic flux. The molten zinc is used in the experiment and the experimental results are compared with the analysis.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 B
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• pp.1318-1320
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• 2005

This paper presents the characteristics analysis of an electromagnetic pump using the linear induction motor(LIM). The characteristics of the pump are analyzed solving two equations : the electromagnetic equation and hydrodynamic one.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.74-76
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• 2006

This paper presents the experiment and characteristics analysis of electromagnetic pump using linear induction motor(LIM). The electromagnetic pump is used to transfer the molten metals by electromagnetic force of LIM. The characteristics of LIM pump for molten metals: zinc, tin, aluminum are analysed solving the magnetohydrodynamics at constant magnetic flux. The molten zinc is used in the experiment and the experimental results are compared with the analysis.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.80-82
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• 2005

This paper presents the characteristics analysis of an electromagnetic pump using a linear induction motor(LTM). The characteristics of the pump for three molten metals Is analyzed by the magneto hydro dynamics: flow velocity, flow mass and etc. The result of the analysis is that the flow velocity for three molten metals is over 0.3[m/s] at the center of duct.

• 조명전기설비학회논문지
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• 제19권5호
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• pp.68-73
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• 2005

본 논문은 선형유도전동기를 이용한 전자기펌프의 특성해석에 대하여 연구한 것이다. 전자기 펌프는 선형유도전 동기의 추진력에 의하여 용융 금속을 이송할 수 있다. 추진력을 높이기 위해 유전 알고리즘을 사용하여 최대 추력을 가지는 선형유도전동기를 설계 하고, 선형유도전동기를 이용한 전자기 펌프의 특성해석을 유동해석에 의하여 분석하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 하계학술대회 논문집
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• pp.159-159
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• 2009

Existence of physical moving parts (ex. check valve) produces several problems (mechanical abrasion, deterioration of reliability, limited temperature performances etc.) in driving pumps. To overcome such problems, we proposed a valveless piezoelectric micro-pump which has new type volume transferring mechanism. The proposed micro-pump has a double faced disk type vibrator that can generate peristaltic motion formed by traveling wave in each surface of a disk. This type of micro-pump is able to apply to a fluid supply system that provides two different kinds of fluid simultaneously. In this paper, we propose a simple and novel design of piezoelectric micro-pump that is peristaltically by piezoelectric actuators and allows the removal of the need for valves of other physically moving parts. The finite elements analysis on the proposed pump model was carried out to verify its operation principle using the commercial analysis software.

• Transactions on Electrical and Electronic Materials
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• 제9권5호
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• pp.181-185
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• 2008

Using the extensional vibration mode of PZT ring, a piezopump is successfully made. The PZT ring is polarized with thickness direction. The traveling extensional wave along the circumference of the ring is obtained by dividing two standing waves which are temporally and spatially phase shifted by 90 degrees from each other. The proposed piezopump is consisted of coaxial cylindrical shells that are bonded piezoelectric ceramic ring. The pump takes an unobtrusive operation into the simple displacing mechanism using peristaltic traveling waves without the physical moving parts. The finite elements analysis on the proposed pump model is carried out to verify its operation principle and design by the commercial FEM software. Components of piezopump were made, assembled, and tested to validate the concepts of the proposed pump and confirm the simulation results. The performance of the proposed piezopump is about 580 ${\mu}l/min$ in flow rate with the highest pressure level of 0.85 kPa, when the driving voltage is 150 $V_p$, 57 kHz.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2012년도 추계학술대회 논문집
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• pp.592-596
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• 2012

This paper presents numerical analysis result of rotor-bearing system of a multi-stage high pressure pump. Especially resonance possibility, stability and damping factor are estimated for a selected commercial multi-stage high pressure pump. The result shows that it is not easy to avoid resonance of rotor-bearing system against main excitation forces which are residual unbalance force and pressure pulsation. This makes damping effect be more important.