• 전기학회논문지
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• 제62권9호
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• pp.1234-1239
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• 2013

This paper provides a technical review of speed control using variable gain PI algorithm for BLDC(Brushless DC) motor. Usually the PI control is used in many motor applications, but a general PI control has problems of overshooting and disturbance for response. By the change of PI gain in motor control operation, these problems can be solved. To find the optimized PI gains for BLDC motor control, many control methods have been proposed. In this paper, the control algorithm with a variable PI gain is applied to improve overshooting response in transient region and rapid load disturbance rejection. Fixed gain and variable gain PI controls are compared. The validity of the propose method is verified by experiment.

• 전기학회논문지P
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• 제51권4호
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• pp.219-221
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• 2002

This paper presents an electric scooter development using blushless DC motor. In recent scooters was to develop for sport leisure and short transportation. Most of scooter are used petroleum gas. This gas scooter has disadvantage to pollute the air. Some of scooters have developed by DC motor which require a brush. However brushless motors have higher maximum speed and greater capacity, save maintenance labour and produce less noise. There is also greater freedom in planing the usage of brushless motors. In this paper we develop an electric scooter driving BLDC motor for design smart system and control speed of scooter with current reference signal to apply voltage to motor by means of three phase inverter. Using accelerator device we generate current reference to control speed and send the current to a MICOM by A/D converter. This MICOM produces the voltage signal and hall sensors signal and PWM controller drive three phase inverter to minimize error between the reference and an actual current.

• Journal of Electrical Engineering and Technology
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• 제9권3호
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• pp.942-949
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• 2014

We studied about the rotor design change using a Ferrite ring magnet to reduce material cost in the condition of the same stator core design. However, this design direction has many weak points such as the decrease of BEMF, the low maximum output, the irreversible demagnetization characteristics of a permanent magnet and so on. In order to mitigate such disadvantages, an optimization design of the BLDC motor has been developed by changing each design parameter and by improving the electromagnetic structure. In the proposed water pump SPM BLDC motor using Ferrite magnet, the outer and inner diameter of stator is fixed to the value of the conventional IPM BLDC motor using Nd-Fe-B magnet. The design specification requirements should be satisfied with the same output power and efficiency characteristics in the same dimension. As a result of this study, the design comparison results considering driving performances and material cost are represented. Through the actual experiment with the prototype of the designed motor, the simulations results are verified.

• 한국전자통신학회논문지
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• 제15권5호
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• pp.907-912
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• 2020

전동기의 수학적 모델 오차와 작용하는 외란을 고려하여 제어기를 설계하는 것이 강건하며 정밀한 제어 성능을 좌우한다. 강건하며 정밀한 제어를 위하여 기계적인 부분과 전기적인 부분의 외란 관측기를 설계하여 외란을 추정하고, 공칭 시스템으로 설계된 속도제어기와 전류 제어기에 나누어 적용하였다. 설계된 시스템의 제어 성능을 확인하고자 120 [W]급의 BLDC 전동기에 적용하여, 속도 추종제어의 결과 외란을 극복하고 정상상태 오차가 영으로 수렴하며, 점근적 안정한 결과를 확인할 수 있다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2001년도 춘계종합학술대회
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• pp.408-413
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• 2001

직류전동기는 자속 및 토크 제어가 간단하고 정밀하여 가변속 구동장치로 많이 사용된다. 그러나 정류자와 브러시의 접촉 및 마모부분이 있으므로 정기적인 보수, 점검이 필요하며, 정류자의 정류 한계상 고속화 및 고압화에 문제가 있고, 대용량화에도 한계가 있으며, 설치하는 환경에도 큰 제약이 따른다. 따라서 이러한 단점을 극복하기 위해 직류전동기를 BLDC 전동기로 대치하여 가변속 제어하는 방법의 연구가 오래 전부터 지속되어 왔다. 본 논문에서는 PWM 인버터로 구동되는 BLDC 전동기의 수학적 모델을 전개하였고, 실험에 의한 파라미터 추정을 통하여 BLDC 전동기의 동특성 및 정상상태특성을 토크, 속도, 전압과 전류에 대하여 시뮬레이션 및 분석하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.329-331
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• 2001

This paper representes a realization of a fuzzy logic speed controller for BLDC motor drives. Fuzzy sets are regulated by using parameters of BLDC motor. Simplified reasoning methods are used for defuzzification. Fuzzy logic speed controller is designed by using the high performance of DSPchip (TMS320F240). By experiment, it is confirmed that the speed of BLDC motor well follows an command speed in the load variables or low-speed area.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.1257-1260
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• 1996

This paper describes a fully digitalized driver for BLDC motors and the driver is realized by a single chip microprocessor. The speed change can be done by using the signal obtained from the position detecting sensor and adjusting the pulse width at the input channel of power module. In order to verify the effectiveness, an repetitive control method is adopted in the speed control tracking a periodic reference change in the BLDC motor system. The experimental results are shown for the reference tracking accurately according to the design parameter variation in the repetitive controller design.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 추계학술대회 논문집 학회본부 A
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• pp.15-17
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• 1999

This paper proposes that optimal design using GA of BLDC motor. To estimate this optimal design method, the performance characteristics of BLDC motor is computed by the equivalent magnetic circuit network method and FEM. To estimate especially the dynamic characteristics of BLDC, we compute the parameter of electrical circuit using FEM.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.1085-1086
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• 2011

This paper proposes a structure optimal design of 2-phase BLDC motor. In order to improve the characteristics of the BLDC motor such as the efficiency, average torque, the Kriging method and genetic algorithm are utilized. In addition, the result of the optimal model were compared with the initial model and verified by 2D FEM.

• 전기학회논문지
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• 제56권12호
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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.