• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.3 no.4
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• pp.3-9
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• 2010

Recently, Applications of BLDC motor have grown gradually in energy savings and controls of speed and torque. But most of BLDC motors need controller and driving circuits aside from motor, according to various situations. In this paper, it was designed for a embedded controller and motor including microprocessor that programmable intelligent control as various circumstances. And in order that the user conveniently use better than to use web browser using TCP/IP module in controller.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.6
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• pp.968-974
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• 2017

In this paper, modeling of brushless DC motor (BLDC) driving system for platform screen door control applied fuel cell power generation system has been proposed. At first the system configuration and operational principle of the developed fuel cell simulator has been investigated and the design of BLDC motor driving system is studied and the overall performance and dynamics of the proposed system could be effectively examined by simulation. PSIM simulation program is implemented to verify the performance and compatibility of the fuel cell power generation system and BLDC motor control system modeling.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2006.05a
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• pp.334-337
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• 2006

외과수술용 핸드피스는 현재 국내 외 병원에서 사용되고 있는 수술 장비 중 필수 보유 장비이다. 선진수술 기법인 인공관절대체수술 시 뼈(Bone) 절단, 다듬질, 구멍등 초섬세 가공을 목적으로 하는 기기이다. 기존의 공압식(Air Type)은 수술 시 많은 양의 질소(N2 Gas)가 소모됨으로써 질소탱크 보관에 많은 공간이 필요하고 잦은 교체를 필요로 한다. 또한 기계소음과 공압식 호스의 이동으로 시술자와 환자사이에 불편함이 발생하고 감염의 위험성이 있으므로 최근에는 충전식을 선호하고 있다. 이러한 이유로 기존의 공압식을 대체할 배터리형 외과수술용 핸드피스를 연구하게 되었다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.10
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• pp.83-88
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• 2015

Due to low cost and high reliability, Brushless DC (BLDC) motors have been widely used in control applications such as robotics, aerospace and automobile. In the high performance control systems, it is very important to maintain the desired speed even in the face of parameter uncertainties, modeling errors, and disturbance signals. In this paper, we present an $H_{\infty}$ controller for the speed control of BLDC motors to achieve better performance of disturbance rejection. In particular, we discuss how to reduce an initial peaks of control input in the proposed $H_{\infty}$ controller. Some experimental results are provided to establish the effectiveness of the proposed method.

• Journal of the Korea Institute of Military Science and Technology
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• v.2 no.2
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• pp.242-250
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• 1999

This paper presents an estimation scheme of the external torque applied on the motor by using measured motor input current when the IPM(Interior Permanent Magnet) rotor type BLDC motor operates with constant speed. In general, the BLDC motor is controlled by vector control method. If it could be operated at over critical speed, the control scheme must be modified to flux-weakening control method. The external torque applied on the motor using flux-weakening control method could not be calculated by conventional torque equation because the demagnetizing current Id exists in the motor input current. In this paper, the commonly used flux-weakening control method is studied and the modified torque estimation scheme is suggested. The estimation scheme has been verified by the simulations and experimental results.

• Proceedings of the KIPE Conference
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• 2015.07a
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• pp.217-218
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• 2015

본 논문에선 BLDCM(Brushless DC Motor)의 전류(轉流)구간에서 발생하는 토크리플을 저감시키기 위해 BLDCM의 역기 전력 모델을 이용하여 상승하는 전류와 하강하는 전류의 기울기가 같아지도록 PWM의 턴-온 시간을 실시간으로 제어하는 방식을 제안한다. 제안된 방식에서는 상이 전환되는 구간에서 상전류의 변화량이 스위칭 시간에 따른 인가전압과 전동기 모델방정식 및 예측되는 역기전력 모델에 의해 예측되어지며, 인가하는 전압의 크기는 PWM의 턴-온 시간에 따라 변하게 되므로, 두 전류의 변화량이 같아지도록 하는 스위칭 시간을 계산하여 적용하는 방식이다. 제안된 방식의 유효성은 실제 BLDCM에 대한 시뮬레이션을 통하여 증명하였다.

• Proceedings of the KIPE Conference
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• 2012.07a
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• pp.600-603
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• 2012

본 논문은 최근 친환경 차량인 EV & HEV의 전장품에 운전 효율 및 연비를 극대화하기 위해 브러시리스 직류 (Brushless DC) 전동기 및 Sensorless Drive를 적용시키는 사례가 증가하고 있다. 특히 전 세계적으로 환경오염의 주범이 되고 있는 차량의 이산화 탄소 배출량 규제, 계속된 유가상승 등에 따라 가장 밀접하게 연관되어 있는 자동차 전장품에 전동화를 통한 연비향상을 적극적으로 추진하고 있다. 본 논문에서는 차량의 전장 제품으로 다양하게 적용되고 있는 에어컨 압축기로 냉방용 컴프레서에 브러시리스 직류전동기 및 Sensorless 제어기를 적용 에어컨 컴프레서를 개발 하여 20CC 전동식 스크롤 컴프레서에 적용하여 실험하였다. 이러한 실험으로 제품의 운전 효율 증대시킴은 물론 우월한 압축 성능을 가져 옴으로써 차량용 에어컨 컴프레서의 고효율 전동화를 유도 시킬 수 있음을 확인 할 수 있었다.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.892-894
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• 1993

In this paper, a new control for the robust position control of a brushless direct drive(BLDD) motor using fuzzy logic controller(FLC) is presented. The integral-proportional(IP) position with speed FLC is employed to obtain the robust BLDD motor system, which is approximately linearized using the field-orientation method for an AC servo. The speed FLC for a BLDD motor has the two rule tables. One is the coarse rule table for the transient state and another is the fine rule table for the steady state. The overall system is controlled by using the microprossor in IBMPC 486 and the the robustness is also obtained.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.1063-1065
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• 1993

LDM, easy to minute position control, is using as X-Y plotter or other recording instruments. Brushless LDM has better properties than the conventional Brush type LDM in many aspects. This paper presents magnetic flux density distribution by FEM and a way to reduce thrust force ripple particurary in low speed drive. And we apply this method to a real mode of LDM. This LDM is operated by IBM-PC host computer and uses rotary encoder to make position signal.

• Proceedings of the KIEE Conference
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• 1994.11a
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• pp.147-149
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• 1994

Binary control with integral COFB is presented to alleviate the chattering. Binary control system consists of the main loop and the external loop which transforms the gain of main loop smoothly, and can generate the continuous control input under the existence of the delay and the switching frequency limitation of the controller. Therefore, it has the properties of chattering alleviation, in addition, advantages of the conventional variable structure control. To confirm the validity of the developed controller, position control of brushless DC motor with binary controller as a position controller is performed.