• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.120-122
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• 2004

In this Paper, high efficiency dual air-gap induction motor with permanent magnet rotor is described. The finite element method is used to design the rotor and magnet. And we presented the analysis, construction, experimental results of prototype single phase induction motor with permanent magnet rotor for air-conditioner fan motor.

• 한국전자통신학회논문지
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• 제13권4호
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• pp.757-764
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• 2018

본 논문은 공조시스템에 사용되는 1마력급 2상 BLDC 팬모터의 설계 및 구현에 관하여 기술한다. 본 연구에서 구현한 BLDC 모터는 수명 및 내구성이 우수한 무정류자 모터방식이며 2상 전원에 의해 구동된다. 공조시스템에 사용되는 모터의 가장 중요한 목표사양은 정격운전점에서 높은 효율을 갖는 것이다. 이를 위해 BLDC 모터의 고정자 형상과 회전자 자석의 설계를 수행하고 구동을 위한 제어회로를 설계하였다. BLDC 모터는 모터부와 제어부 그리고 전원부가 일체화된 구조를 갖는다. BLDC 모터의 특성계산을 위해 유한요소해석을 사용하였으며 시제품의 제작 및 성능시험을 실시하여 설계결과의 적합성을 확인하였다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.1391-1396
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• 2009

The direct drive motor used in a precision motion rotate at about 1/10 speed and high torque comparing with general rotary motor. Excessive heating of the coils cause an exacerbating the heat problems and reducing the performance of motor. Because the rotation speed of the rotor and surrounding air is low, the motor can not be inefficiently cooled, the thermal analysis in the motor is very important. As the variations of rotation speed and torque, the temperature of several parts is measured and the features of the heat transfer is analyzed and improved.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2006년도 춘계학술대회
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• pp.67-72
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• 2006

Blower as an air supply system is one of the most important BOP (Balance of Plant) system fur FCV(Fuel Cell Vehicle). For generating and blowing compressed air, the motor of air blower consumes maximum 25% of net power and fuel cell demands a clean air. Considering the efficiency of whole FCV, low friction lubrication of high speed rotor is needed. For the purpose of reducing electrical power and supplying clean air to Fuel cell, oil-free air foil bearings are applied at the each side of brushless motor (BLDC) as journal bearings which diameter is 50mm. The normal power of driving motor has 1.7kW with the 30,000rpm operating range and the flow rate of air has maximum 160 SCFM. The impeller of blower was adopted a mixed type of centrifugal and axial which has several advantages for variable operating condition. The performance of turbo-blower and parameters of air foil bearings was investigated analytically and experimentally. From this study, the performance of the blower was confirmed to be suitable far 80kw PEM FC.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.857_858
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• 2009

On account of small size and light weight, a high-speed machine is regarded as a key technology for many future applications of drive systems. In high-speed applications, permanent magnet (PM) synchronous motors have a number of merits such as high efficiency and high power density. Accordingly, they are suitable for driving the air-blower of a fuel cell electric vehicle (FCEV) where space and energy savings are critical. Particularly, a surface-mounted PM motor of them is mainly used as a high-speed machine. However, the motor has a fatal flaw owing to a retaining can to maintain the mechanical integrity of a rotor assembly. The can results in the increase of magnetic air-gap length in the surface-mounted PM motor. Thus, in this paper, an interior PM motor is designed in order to drive the air-blower of FCEV instead of the surface-mounted PM motor, and the experimental results of two models are compared to verify the capability of the interior PM motor for a high-speed machine.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1075-1076
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• 2007

The HEV (Hybrid Electrical Vehicle) becomes commercialized recently because of high fuel efficiency and low air pollution. The highest output power system except the traction motor is an air conditioner compressor in HEV system. The full or hybrid electric compressor is applied for HEV. The general HEC (Hybrid Electric Compressor) requires the half power motor and drive system of the full electric compressor because the rated output power of motor drive system is designed to charge the minimum cooling capacity at the time of idle stop. Therefore, this hybrid electric is more economical and practical solution. In this paper, we studied about the motor drive system of hybrid electric compressor for HEV. The applied voltage specification is 42 V, an IPMSM (Interior Permanent Magnet Synchronous Motor) is designed and applied as the compressor drive motor.

• 한국전자통신학회논문지
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• 제18권5호
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• pp.827-834
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• 2023

본 연구에서는 자동차 송풍장치용 slotless Outer Rotor BLDC 모터를 설계하고 제작하여 기존의 모터들의 단점을 개선하였다. 제안된 모터는 Brush를 제거하여 회전 시 DC 모터의 기계적 마찰에 의한 소음을 해결하고, 구조적으로 Slotless Air-Gap 권선을 사용하여 BLDC 모터 슬롯에 의해 발생되는 코깅 토크를 개선하였다. 그리고 외부 회전자에 Magnet을 부착시키고 내부 회전자와 동시에 회전하기 때문에 자속의 변화가 생기지 않아 구조적으로 철손을 원천적으로 줄여 높은 효율을 가진다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 춘계학술대회논문집
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• pp.674-681
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• 2008

The main noise source of the BLDC rotary compressor for air conditioner was analyzed by using the measurement of noise and vibration, noise contour, and experimental modal analysis. The source is presumed to the mechanical resonance excited by the electromagnetic attractive force of the BLDC motor. To reduce the excessive noise of the BLDC rotary compressor due to the mechanical resonance, air-gap was enlarged. Its validation was conducted by the analysis of the electromagnetic attractive force which is generated by the BLDC motor. By enlarging the length of air-gap, the noise in the compressor and air conditioner was significantly improved by 2.5dB(A) and 4.5dB(A), respectively.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 춘계학술대회논문집
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• pp.87-87
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• 2004

An air-conditioner has various noise sources such as a fan noise, a motor noise, and a vibration induced noise. To reduce these noise effectively, noise sources must be identified. Especially in this paper, the structure borne sound radiated from the motor bracket of the indoor air-conditioner is considered. To do this, the operational deflection shape, which is used for understanding of the behavior of the motor bracket at a particular frequency, is obtained and compared with the sound intensity, which is used for the noise identification. Through this study, the noise sources of indoor air-conditioner are defined and the effective noise reduction method is proposed.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2011년 춘계학술대회논문집
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• pp.529-534
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• 2011

The air-motor unit of the hand-piece had not been developed inside of the country yet. Therefore it needs some research works. The objective of this study is to investigate the effect of the many mini holes at the outle of the air-motort. The flow fields analysis has been conducted by the immersed solid method using ANSYS 12.0 CFX.