• Proceedings of the KIEE Conference
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• 1998.07a
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• pp.61-63
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• 1998

A B-H curve measuring system for testing softmagnetic materials was constructed. This system can measure the B-H curve in the low frequency(0.1 - 1 Hz) range. The drift of the integrator can be moderately removed by software technique. The advantages of the developed system are easier to measure B-H curve compared with conventional measuring system and low cost.

• Proceedings of the KIEE Conference
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• 1998.07a
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• pp.331-333
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• 1998

This paper deals with the analysis of the magnetic circuit of a claw pole type step motor. The air gap flux equation is derived using Thevenin equivalent circuit. On the base of the magnetic circuit analysis, both static torque and the dynamic torque characteristics are presented.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2002.10a
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• pp.405-410
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• 2002

Linear motor food system control algorithm was extended to the two axis system. Among several factors considered, overshoot of the response was the most important one in minimizing position tracking error. Balance between overshoot and settling time has to be adjusted to guarantee to best tracking performance. Tracking route was carefully executed to eliminate the possible error during the machining process. Even though there exists slight discrepancy between desired mute and cutting track at the corner, precision machining could be implemented using the cutting scheme introduced.

• 유체기계공업학회:학술대회논문집
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• 2003.12a
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• pp.379-384
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• 2003

A turbo blower directly driven by a variable-speed BLDC motor was designed and tested to investigate performance characteristics. Computational analysis and performance tests validated the design method for the present turbo blower. Experimental measurements showed that the blower has an enough stability margin. This paper gives an outline of design, computational flow analysis and performance test for aerodynamic performance of the blower

• 전기의세계
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• v.44 no.10
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• pp.47-54
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• 1995

본 논문은 ISO 관련 소음 측정 표준안(1995년 8월 기준)들에 포함된 기본적 측정량들의 정의, 그들의 측정 및 분석 방법의 간략한 소개와 더불어 이들 규격의 활용 방안을 예시한다. 제 2절에서 소음 측정관련 기본 양들의 정의와 전문 용어들을 간략히 소개한다. 이러한 측정치를 이용하여 우리 주위에서 가장 가까이 있는 컴퓨터의 소음 측정 및 평가 방안을 제 3장에서 토의 한다. 그리고, 전기 기기류의 대표적 소음원이며 산업의 동력원인 모터 및 발전기의 소음 측정 및 특성 평가방안을 검토한다. 끝으로, 우리 산업계와 소음 관련 업무의 향후 나아갈 길을 제 5장에서 요약한다.

• Proceedings of the KIEE Conference
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• 2009.04b
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• pp.61-63
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• 2009

This paper design a rotor shape of a BLDC motor used for reciprocating compressor. Demagnetization analysis of a basic model is performed by 2D finite element method. This type improved demagnetization characteristics and showed good performance to resist partial demagnetization of ferrite magnet.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1285-1286
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• 2007

In this study, novel structured thin ultrasonic rotary motor has been proposed. Ultrasonic motors are based on an elliptical motion on the surface of elastic body. ATILA ver. 5.2.4 was used for optimizing stator. The motor was fabricated by using designed stator. And characteristics of the motor were compared with simulated results. When the motor was fabricated with these results, 860[rpm] speed was obtain by input voltage of 16[Vrms] at 92.5[kHz].

• Proceedings of the KIEE Conference
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• 2001.10a
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• pp.9-11
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• 2001

This paper deals with design and characteristic analysis of a permanent magnet linear synchronous motor for magnetic levitation stage of semi-conductor manufacture machine. In order to improve the control performance by detent force minimization, skew and PM offset method are used.

• Proceedings of the KIEE Conference
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• 1998.11a
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• pp.49-51
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• 1998

This paper presents 2-pole permanent magnet synchronous motor(PM-SM) designed for the high-speed drives. Therefore. this motor has the NdFeB Permanent magnet as rotor. which is designed simper than the commercial PM-SM. We treated the developments - design. analysis - of PM-SM

• Proceedings of the KIEE Conference
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• 1998.11a
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• pp.58-60
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• 1998

This paper analyzes the torque characteristics with the structure of harmonic side drive motor using by F.E.M and conformal mapping method. F.E.M and conformal analysis result are almost same. Through the results, we investigate how do design parameters variation affect torque characteristics.