• Proceedings of the KIEE Conference
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• 2004.04a
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• pp.253-255
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• 2004

Conventional magnetic levitation systems could show unsatisfactory performance under air-gap disturbance due to rail irregularities. In this paper, we propose a feedback control system with discrete Kalman filter for air-gap disturbance attenuation. It is shown that excellent system performance can be obtained with the use of discrete Kalman filter, and that results from experiments agree well with those of simulations.

• Proceedings of the KIEE Conference
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• 2002.04a
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• pp.251-253
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• 2002

Various measures of power quality are addressed, specifically power factor, power variability, electrical transients, flicker and harmonics. This paper presents the measurement criteria for monitoring and diagnosis of power quality according to the distribution system interconnection of wind turbine.

• Proceedings of the KIEE Conference
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• 1999.11b
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• pp.61-63
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• 1999

This paper reports analysis and test results on the new type Linear Oscillatory Actuator(LVDT actuator) which has been expected to be applied not only to measure position but also to drive as an actuator at the same time.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.895-896
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• 2006

This paper presents an analytical solution to calculate parameters of permanent magnet synchronous motor equipped with surface-mounted magnet by using transfer relations theorem(TRT) in terms of two-dimensional model in polar coordinates. The analytical results are validated by comparison with finite element analyses (FEA).

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.903-904
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• 2006

This paper deals with analysis of linear switched reluctance motor at high speed. First, we defined turn-on position at inductance profile. Second, in turn-on section, we analyzed characteristic of linear switched reluctance motor according to speed. Also, we used finite element method at analysis process.

• Proceedings of the KIEE Conference
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• 1994.07a
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• pp.60-62
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• 1994

In this paper, the LVDT with compensating secondary coil and secondary current boost circuit is proposed. The LVDT was experiment with a test device, and analyzed with numerical method (FEM), It is shown that the LVDT has a good linearities for the measurement of the displacement and position, etc..

• Proceedings of the KIEE Conference
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• 1997.07a
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• pp.54-56
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• 1997

In this paper, The considerable matters for the calculation and determination of the rated electric power of the three phase Linear Induction Motor for the propulsion of a vehicle, is treated with inverter performance with harmonics, aerodynamic drag force, running resistance, normal force.

• Proceedings of the KIEE Conference
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• 1997.07a
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• pp.218-220
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• 1997

An electronic technique which greatly compensate the magnetizing current of the magnetic core of a current transformer which can be measure a current with harmonics, is described.

• Proceedings of the KIEE Conference
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• 1997.07a
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• pp.294-296
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• 1997

LOA(Linear Oscillating Actuator) is composed of a voice coil type mover and permanent magnets. we have applied LOA to the active vibration control system to supress structual vibration. In this paper, the static test of the voice coil type LOA is treated. The thrust developed by LOA is calculated by measuring stroke.

• Proceedings of the KIEE Conference
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• 1999.07a
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• pp.293-295
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• 1999

피 측정물의 변위를 기계적 변화로 감지하여 나타내는 LVDT는 상호인덕턴스 변화를 이용하는 대표적 변위 트랜스듀서이다. 본 연구에서는 LVDT에 대한 상품화를 위한 설계와 제작, 그리고 신호변환장치에 대한 과정을 기술하였으며, 최종 성능 특성을 측정하여 상품화를 위한 신뢰성의 정도와 선형도 등을 평가하였다. 이러한 상품화 과정을 통하여 산업현장에서 자동계측과 제어를 위한 트랜스듀서로 활용할 수 있도록 하고자 한다.