• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.5
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• pp.899-906
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• 2020

Motor control requires robust and precise control performance even in the presence of errors in the mathematical model of the motor and disturbances acting on the motor. For robust and precise control, a disturbance observer was designed to estimate the load fluctuation and applied to a back-stepping controller designed as a nominal system. The control performance of the designed system was verified by applying it to the 120 [W] Brushless Direct Current Motor. As a result of the position control and speed control, the disturbance is overcome from the steady state error converges to zero, and asymptotically stable results can be confirmed.

• The Transactions of the Korean Institute of Power Electronics
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• v.9 no.6
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• pp.517-524
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• 2004

In this paper the novel operation method of concentration winding BLDC motor of air conditioner compressor to improve efficiency is proposed.. Because it demands generally the need of more confidential sensorless operation, it Is hard to apply to three phases - three excited operation by reason of intricate calculations. In order to improve the defects of 120 degrees electrical conduction method, a novel PW Pattern is proposed. Established three phases - two excited system on real load air conditioner is used in experiment.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.37 no.2
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• pp.85-95
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• 2000

This paper describes a sensorless control scheme for brushless dc motors(BLDCMs) using a phase shifter(FIPS) which can shift the zero-crossing point of the input signal with a specified amount of phase. The detection performance of the proposed FIPS is independent of the frequency of the input signal and quite robust with respect to the measurement noise. It is shown that the proposed sensorless control scheme using the FIPS is more effective in the respects of noise-robustness and cost than the previously known schemes. The generality and practicality of the proposed sensorless control scheme is demonstrated through performance analysis and experiments under various operating conditions.

• Proceedings of the KIPE Conference
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• 2006.06a
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• pp.501-503
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• 2006

최근 산업 분야에서 리니어모터는 고속, 고정밀도의 요구사항에 따라 회전 모터와 볼 스크류, 벨트를 이용한 직선구동방식보다 빠르고 정확하며, 효율이 높기 때문에 활발히 이루어지고 있다. 리니어모터 중에서 선형 브러시리스 직류 전동기(LBLDCM)는 다른 리니어모터에 비해 소형, 경량이 가능하고, 저속 및 고속의 운전이 용이하며, 기계 가공 정도보다는 엔코더 등과 같은 위치 결정 응용 분야에 적합하며 본 연구에서 사용된 LBLDCM은 코일 가동형으로 영구 자석에 의해 발생된 자계와 가동자 코일에 흐르는 전류 사이에 작용하는 힘을 이용하게 된다. 이와 같은 LBLDCM을 응용분야에 적용하기 위해서는 구동 중에 속도가 변하는 지점에서 발생하는 진동을 줄여야 하며 목표지점까지의 정확한 위치 제어가 필수적이다. 따라서, 본 연구에서는 다양한 속도 프로파일에 따른 진동에 대해 비교 분석한 후, 이동거리에 따른 적합한 속도 프로파일에 대해 알아보았고, 그 결과를 토대로, 목표지점까지의 위치 오차를 저감하면서 정밀한 위치 제어에 적합한 프로파일을 제시하였다.

• Proceedings of the KIEE Conference
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• 2001.04a
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• pp.33-36
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• 2001

Torque ripple control of brush less DC motor has been the main issue of the servo drive systems in which the speed fluctuation, vibration and acoustic noise should be minimized. Most methods for suppressing the torque ripples require Fourier series analysis and either the iterative or least mean square minimization. In this paper, the novel approach to achieve the ripple-tree torque control with maximum efficiency based on the d-q-0 reference frame is presented. The proposed method optimize the reference phase current waveforms including even the case of 3 phase unbalanced condition, and the motor winding currents are controlled to follow up the optimized current waveforms by delta modulation technique. As a result, the proposed approach provides a simple and clear way to obtain the optimal motor excitation currents. The validity and practical applications of the proposed control scheme are verified through the simulations and experimental results.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.12 no.2
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• pp.29-37
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• 1998

This paper describes the fault diagnosis based on real-time data of the inverter system for brush less DC motor drive. After identifying all the fault types in the inverter system, a preliminary typical analysis of fault types has been classified into the key fault symptoms. The predicted fault performances are then substantiated by using ACSL(Advanced Continuous Simulation Language), and the simulated results are composed of knowledge-base. The real-time measured data from the inverter system are compared with the simulated knowledge-base through the inference engine of expert system, which have been used to diagnose the fault causes. If some faults may occur in the inverter system, this system will be stopped. And then the expertise of elimination and remedial strategies about the fault causes, will be supplied rapidly to operator who doesn't know well about the inverter drive system.system.

• Proceedings of the KIEE Conference
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• 2001.07b
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• pp.1138-1140
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• 2001

본 논문은 BLDCM의 센서리스 운전에 관한 것으로 운전속도에 따라 인버터 스위칭 주파수를 적절히 가변함으로서 넓은 속도범위에 서 운전성능과 효율을 개선시켜 센서리스 운전을 향상시킬 수 있는 방법을 제시하였으며 실험을 통하여 유용성을 입증하였다.

• Proceedings of the KIEE Conference
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• 1989.11a
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• pp.438-441
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• 1989

In this paper the phase advance method is adopted for torque characteristics improvement of brushless D.C motor and the effect on motor characteristics is investigated. The optimal commutation position is calculated by computer simulation. This paper also implements a driver for brushless D.C motors using single-chip microprocessor, 8751.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• v.4B no.1
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• pp.20-23
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• 2004

BLDCMs are widely used in many industries. In certain specialized areas, they need to have high efficiency, high power rate and produce a low volume of noise, etc. In this study, a new type of slotless BLDCM is proposed that has no cogging torque, low iron loss and low volume as compared to commonly used BLDCMs. With a high performance magnet and coreless compact winding structure similar to those employed in linear synchronous motors, motor volume is reduced. The proposed motor has been put been through various experiments arid has demonstrated acceptable results for industry applications.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.12
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• pp.2127-2134
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• 2007

The simulation model has been already developed not for 7 phase but for 3 phase BLDC motor. It is necessary to develop a new simulation model of multi-phase BLDC motor including the phase delay angle especially in the high speed region. In this paper, the suitability of the proposed model is verified through the several computer simulations, and experimented results.