• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.816_817
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• 2009

Optimization of geometry is one of the most important design process of the electrical motors. Tooth and yoke width are important variables that can maximize back emf and load torque among various design parameters. In this paper, in order to design the tooth and yoke width effectively, an equivalent magnetic circuit of one pole is constructed and an optimal value of tooth and yoke width resulting minimum reluctance are determined instead of a finite element analysis(FEA) that is time consuming.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.875_876
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• 2009

Recently, Interior Permanent Magnet Synchronous Motor(IPMSM) is widely used in the industry applications such as power train for hybrid vehicles and compressor motors of air-conditioner due to its high power density and wide speed range. There are some ways for confirming of maximum power in IPMSM. However, This paper suggests that there is a way about making sure maximum power by reducing turn numbers of armature winding. Setting up the voltage equation through the equivalent circuit and vector diagram of IPMSM first, and then estimating the parameter and power of IPMSM by changing the turn numbers of armature winding and voltage. In order to satisfy output power, the turn numbers of armature winding is changed by using the characteristic analysis, and then checking whether secure maximum power or not.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.844_845
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• 2009

Inductance and back EMF are important parameters in characteristic analysis of brushless motor. Inductance is constant value in surface permanent magnet type brushless motor. But it is change depending on the position of the rotor in interior permanent magnet type brushless motor. So this paper is considering for change inductance in characteristic analysis of brushless motor. Characteristic analysis is executed by the method that three-phase bipolar 120 degree commutation drive type.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.867_868
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• 2009

Interior permanent magnet synchronous motor [IPMSM] which has high power density is applied to motor for Hybrid electric vehicle[HEV], Electric vehicle[EV], Fuel cell electric vehicle[FCEV] and electric home appliances. In order to improve efficiency performance of IPMSM, this paper presented a study by making a hole around air barrier. Because concentrated rib stress is distributed by suitable hole, the hole can reduce rib thickness of IPM rotor. And it can help decrease PM[Permanent Magnet] leakage flux. Saliency ratio($L_q/L_d$) is also increased by magnetic circuit change. For this study, structure analysis of rotor is performed by Ansys program.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.738_739
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• 2009

This paper describes the calculation of the equivalent circuit parameters according to the slip in squirrel-cage induction motor. Recently, the induction motor is demanded of the various operation condition. In order to acquire the accurate characteristic for the operation condition of the motor, equivalent circuit parameters have to be calculated accurately. So the equivalent circuit parameters are computed by using the finite element method, the reliable characteristic analysis is carried out by application of the parameter to the equivalent circuit analysis. From the analysis result using this combined equivalent circuit and finite element method is compared with the experimental results by a detailed equivalent circuit, the validity of the method is proved.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.676_677
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• 2009

In this paper, an analytical method used for predicting the magnetic field distribution and cogging torque characteristic in a permanent magnet synchronous motor (PMSM) is presented. The magnetic field is analyzed with the space harmonic analysis, and the cogging torque is calculated based on the air-gap field distribution and slot-opening effect considered by relative permeance. The validity of the presented analytical method is confirmed by 2-dimensional finite element analysis (FEA). Then this analytical method combines with response surface methodology (RSM) is applied to the prototype PMSM model rebuilding in order to minimize the cogging torque. Finally, an optimized PMSM model is built and the cogging torque reduction is confirmed by FEA.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.824_825
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• 2009

This paper deals with the characteristics of SPMSM for hydraulic actuator according to the slot number. As a design variable, slot number affects the winding configuration and this leads to the total variation of motor characteristic. Therefore number of slot should be cautiously determined. Three SPMSMs are designed and THD of back emf, cogging torque, and torque ripple are compared. Among three SPMSMs, 36slots with 12 pole is chosen for further development considering motor characteristics and manufacturing.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 1999년도 춘계학술발표논문집 논문집
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• pp.97-102
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• 1999

The purpose of this study is to find out the moderating influences of unity on typicality effect of prototype theory in new product development process. It is said in the classical point of view of categorization that the higher level of typicality, the more preference a consumer have on a specific product. According to, however, the prototype theory's view on the relationship between product preference and typicality, there is an inverted U-shaped relationship between those two factors. But the prototype theory is needed to be verified with various design variables such as harmony, proportion, balance etc as well as unity. Therefore this study verified moderating effect of unity on typicality effect of new product.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2007년도 춘계학술대회 및 국제감성 심포지엄
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• pp.77-80
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• 2007

본 연구는 감성정보에 대한 모델을 구축하기 위하여 감성 정의를 "알고 있는 지식" 으로 규정하고 진행하였고, 감성디자인의 프로세스를 구축하기 위하여 암묵지식 이론과 이분법을 응용하여 감성요소를 추출하였다. 실험 방법에 있어서는 대상 주제에 대한 피험자가 표현하는 내용을 정리하고 이것에 대해 연구자가 이분법을 반복하여 실시하였으며, 압축된 분할 기준을 만들고 결과를 수량화 3류에 의한 해석과 샘플스코어를 직관적으로 이해하기 쉬운 트리 구조로 정리하였다. 이러한 감성 정보과정의 반복을 통하여 감성 디자인 프로세스를 구축하였다.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2007년도 춘계학술대회 및 국제감성 심포지엄
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• pp.81-84
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• 2007

소비자들이 상품에 대한 미학적인 측면을 점점 더 중요시 하게 됨에 따라 현대 디자인은 기존의 개념을 탈피하여 새롭고 부드러우며 유연한 감성이 요구되고 있다. 디자인의 궁극적인 목표가 '소비자의 꿈을 현실로 만들어 주는 것'이라면 이러한 목표에 이르기 위한 '창의적 아이디어발상' 은 디자이너가 갖추어야 할 가장 중요한 능력 중의 하나이다. 따라서 본 연구는 창의적 아이디어 발상법에 대한 선행연구의 프로세스와 방법론의 문제점을 파악하고, 이를 보완한 새로운 디자인 방법론을 제시하고자 한다. 이와 같은 연구목적을 이루기 위해 사례연구로써 컴퓨터를 이용한 창의적 아이디어 발상법을 제안하여 디자이너에게 실제 디자인현장에서 활용할 수 있도록 하며 창의적 아이디어발상법의 개발에 대한 효과와 새로운 가능성을 제시하고자 한다.