• 재활복지공학회논문지
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• 제7권2호
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• pp.7-12
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• 2013

본 논문에서는 동력의지를 위한 브러쉬리스 DC 모터 구동 시스템과 DC 링크단의 전류를 이용하여 상전류를 추정하는 기법을 제안한다. 토크제어를 위해서는 전류 측정이 매우 중요하며 전류 측정 시 스위칭 노이즈를 최소화하기 위해 전류 센싱 시점은 스위칭 전압 명령에 동기화 되어야 한다. 저가의 시스템, 공간의 절약 그리고 제어의 단순화하기 위해 DC 링크단 전류를 사용한 제어를 실시하였다. 또한 환류 다이오드를 통해 흐르는 전류에서 발생하는 DC 링크단 전류와 상전류간의 오차를 줄이기 위해 Analog MUX를 이용한 상전류 추정방법을 사용하였다. 실험 결과를 통해 제안한 시스템의 유효성을 검증하였다.

• Journal of international Conference on Electrical Machines and Systems
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• 제2권1호
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• pp.91-96
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• 2013

Recently, it is increased to apply sensorless drive for BLDC (Brushless DC) motor to household electrical appliances, especially in the refrigerators and air conditioners, to reduce the cost and the acoustic noise by the operation and to make their functions more comfortable for human beings. In this paper, low-cost sensorless drive for BLDC motor is implemented by random PWM (Pulse Width Modulation). The experimental results show that the electromagnetic noise was reduced and the sound quality was improved by BLDC motor sensorless random PWM Control.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 추계학술대회 논문집
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• pp.307-310
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• 2008

This paper is proposed the vector control of 3-phase induction motor drive system by photovoltaic generation. For performance of vector control using a current control voltage source inverter(CC-VSI). CC-VSI is controlled by torque and flux producing component of motor current, relating with current and voltage value of photovoltaic arrays at maximum power point that varies follow different level of insolation. The MPPT using a DC-DC converter controlled the duty cycle to track maximum power from PV under different insolation conditions. The simulation results are shown that the characteristics and performance of drive system, which varies as each conditions of light by expresses in voltage($V_{dq}$), current($I_{dq}$), speed of motor and torque.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
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• pp.102-104
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• 1988

This paper is studied the new speed control system of the DC motor which can drive constant speed at variable load as well as reduce the homonics. System is used thyristor-Leonard circuit with 2-tap in order to reduce the homonics problems due to chopping dc input voltage in chopper system and semiconductor devices in thyristor-Leonard system. There is added to the PLL system to drive the constant speed in variable Load, which has controlled of variable speed in DC motor. Thereby, we have proved its through experiment.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 B
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• pp.1176-1178
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• 1992

This paper shows enhanced working performance of the battery fork-lift truck by developing the IGBT full bridge dc-dc convertor using one-chip micro-processor. The PWM pulse is generated from a 16 bit one-chip micro-processor for the speed control of DC motor. In order to ensure the operation of IGBT and motor pecewisely, IGBT gate drive circuit was designed by using current limiting IC and hige voltage limit IC. And also It is able to regenerative braking.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2008년도 하계학술대회 논문집
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• pp.478-480
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• 2008

On this paper, digitally controlled push-pull dc-dc converter and dc-ac inverter for induction motor control are presented, which is used one DSP(digital signal processor). This system has 12V battery input for the push-pull converter, and the push-pull converter generates 300V output for induction motor inverter input. In order to compensate the push-pull converter, the transfer function of push-pull converter is derived and digital PI compensator is adapted. Through bode diagram, stability of digital controlled push-pull converter is analyzed. To verify the proposed system, digital simulation of the induction motor drive using digital push-pull converter are performed.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2008년도 하계학술대회 논문집
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• pp.598-600
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• 2008

On this paper, digitally controlled flyback dc-dc converter and dc-ac inverter for bldc motor control are presented, which is used one processor. This system has 12V battery input for the flyback-converter, and the flyback-converter generates 30V output for BLDC motor inverter input. In order to compensate the flyback-converter, the transfer function of flyback converter is derived and digital PI compensator is adapted. Through bode diagram, stability of digital flyback-converter is analyzed. To verify the proposed system, digital simulation of the bldc motor drive using digital flyback-converter are performed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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• pp.414-417
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• 1988

This paper presents a study on the operation of a digitally controlled DC servo motor drive at low speed region. Two schemes aiming to improve the transient behavior of the speed control system are considered. The first scheme is the current positive feedback scheme to reduce the sensitivity of the system with respect to the load torque variations. The second one is the speed observer based on a motor model. Finally, the two schemes are studied by simulation and then verified experimetally using a prototype DC motor drive.

• 전력전자학회논문지
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• 제2권3호
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• pp.44-50
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• 1997

본 논문은 영구자석 매입형 브러시리스 직류 전동기를 회전자 위치 센서 없이 구동하는 센서리스 드라이브의 개발에 관한 연구이다. 영구자석 매입형 전동기는 회전자의 위치에 따라 각 상의 인덕턴스가 크게 변화한다. 회전자의 위치를 간접적으로 검출하기 위해 인덕턴스 변화에 따른 단자전압 파형의 특성을 분석하고 이에 적합한 회전자 위치 간접검출 방법을 제시하였다. 또한 87c196mc 원 칩 마이크로프로세서를 이용하여 실용적이고 경제성 있는 센서리스 드라이브를 제작하여 에어콘 콤프레서의 구동에 적용하였다. 제시된 실험 결과는 본 연구에서 제안한 간접검출 방법의 타당성과 개발된 드라이브의 유용성을 보여준다.

• 한국정밀공학회지
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• 제17권8호
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• pp.157-164
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• 2000

This paper presents a method to detect a rotor position and to drive a BLDC motor from standstill to medium speed without any position sensor comparing the current responses due to the inductance variation in the rotor position. A rotor position at a standstill is identified by the current responses of six pulses injected to each phase of a motor. Once the motor stars up pulse train that is composed of long and short pulses is injected to the phase corresponding to produce the maximum torque and the next phase continuously. it provides not only the torque but also the information of the next commutation time effectively when the response of long and short pulses crosses each other after the same time delay. This method which is verified experimentally using a DSP can drive a BLDC motor to the medium speed smoothly without any rattling and time delay compared with the conventional sensorless algorithm.