• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제52권6호
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• pp.247-253
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• 2003

A novel finite element mesh regeneration method is presented for 3D shape optimization of electromagnetic devices. The method has its theoretical basis in the structural deformation of an elastic body. When the shape of the electromagnetic devices changes during the optimization process, a proper 3D finite element mesh can be easily obtained using the method from the initial mesh. For real engineering problems, the method guarantees a smooth shape with proper mesh quality, and maintains the same mesh topology as the initial mesh. Application of the optimum design of an electromagnetic shielding plate shows the effectiveness of the presented method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 A
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• pp.238-240
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• 1996

This paper presents the optimum design of the slit type linear induction motor(LIM). For the analysis of the slit type LIM, as the boundary problem, the equivalent circuit is composed from the analysis method given the slit pitch boundary condition. Using the deterministic method and the stochastic method among the optimization methods, each of the optimum design variables is derived. The analysis result by the proposed method is compared with the experimental result.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.163-165
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• 2003

Over the past several years, the application extent of the real-time systems is being expanded with the progress of civilization. An effort to minimize power consumption at the system is being accomplished in several fields from the design of an analog/digital circuit up to the device level Things of this effort have included the power optimum-technique to minimize power consumption at the digital logic circuit and the dynamic managed skill by means o( the decision of the operating system. In this paper, we designed of low power system by using Power-optimized method. As an effective low-power design, we designed the low power system which it has a monitoring system within the main board and a personal computer.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.195-197
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• 1997

In this paper, the optimal design of interior permanent magnet synchronous motors for electric vehicle driver system is achieved to maximize the torque in constant torque region. Initial design is peformed taking into account load characteristics of electric vehicle and we use sequential uncostrained minimization techniques. In the results, the torque in constant torque region is improved about 13.5%.

• Journal of Electrical Engineering and Technology
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• 제10권6호
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• pp.2271-2276
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• 2015

A superconducting synchronous generator (SCSG) can be expected to decrease the size and weight compared to conventional tidal current generators. This paper proposes an optimal design of a 2 MW class SCSG for a tidal current power generation system. The proposed optimal design of the SCSG will reduce the length of the high-temperature superconducting wire as well as the weight and volume of the SCSG. The 3D finite element method is used to analyze the magnetic field distribution. The optimized 2 MW SCSG is compared with a 2 MW conventional generator. As the optimized SCSG is more compact and lighter than a conventional generator, it will be efficiently applied to practical tidal power systems.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.753-754
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• 2006

In case of the synchronous reluctance motor, the torque is proportional to silency difference and the power factor is in proportion to silency ratio. This paper presents the rotor design variable that has a effect on silency difference and silency ratio for getting a maximum torque and a power factor in the synchronous reluctance motor. To carry through the object, a number of the analysis model is reduced by DOE (Design of Experiments) and the main effects are found by the FEM (Finite Element Analysis).

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.767-768
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• 2006

Cogging torque is produced in a permanent magnet machine by the magnetic attraction between the rotor-mounted permanent magnets and the stator. It is an undesired effect that contributes to the machines' output ripple, vibration, and noise. This paper presents the stator design for reducing cogging torque in the BLDC motor by using the DOE(Design of Experiments). The cogging torque is computed by using a two-dimensional finite element analysis.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 B
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• pp.1176-1178
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• 1996

QFT(Quantitative feedback theory) is a design method to synthesize robust controller, satisfying some design specifications. Loop shaping is regarded as one of the important steps in QFT design. In this paper, we present to apply the approximation algorithm for loop shaping to PID tuning. An example is used to illustrate its feasibility.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 B
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• pp.1080-1082
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• 2005

This paper presents the system design of permanent magnet linear synchronous machine with double-side PM mover and slotless iron-cored stator in the required speed and thrust. in this paper, the design of manufacturing motor is optimized by characteristics of motor parameters with the variation of PM size and coil turns. And, the permissible operating range of manufactured motor by determination of base speed and base thrust according to switching scheme of DC link voltage are offered. Finally, the results of analytical solutions are verificated by finite element analysis and experiment.

• 전기학회논문지
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• 제65권11호
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• pp.1813-1819
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• 2016

In this paper, LS-SynRM (Line Start-Synchronous Reluctance Motor) has been attracting attention in replace of induction motor which hardly provides high efficiency. Compared to induction motor, LS-SynRM has better efficiency per unit area. This study demonstrated the electromagnetic design methods of LS-SynRM while maintaining the frame of existing IE3 induction motor for blower. We documented the design procedures for generating high saliency which is the most essential and mechanical stress analysis is also treated. In conclusion, we proved the validity of our design by manufacturing and testing our LS-SynRM models.