• 전기학회논문지
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• 제59권4호
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• pp.733-739
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• 2010

We developed to have an automatic transferring function of a two-motors-driven electrical scooter for women or seniors to use conveniently it since it has been previously to operate it in manual only. The function would be implemented by using master and slave micro-control units(MCU) in the system with the given input and output signals. The simulation and test of the system results show that the transition conditions of either higher accelerating speed and/or higher torque are demonstrated at the worst conditions, which means that the transition points might be set either at the 70% of accelerating speed or from the 100% of load torque. The developed equipment is very useful and has good performance in the real test and would be used for top brand and might be applicable to any other types of green cars.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 A
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• pp.322-324
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• 1994

The 2nd prototype LPM is designed as single side stator structure for improving the thrust force and acceleration time. Experimental results are shown that the static and dynamic characteristics are improved compared with the 1 st prototype. By the computer simulation, the permanent magnet design method is also clarified to desired thrust force. And microstep driver is adopted to the position controller to the designed LPM. The driver suppressed position errors within 1/10 pitch.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2018년도 춘계학술대회
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• pp.679-680
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• 2018

IoT(사물 인터넷)는 더 이상 개념에만 머물러있지 않고, 개인 사용자가 직접 소형 보드와 부품을 통해 구현을 해보는 등 일상화되었다. 본 연구는 일반 장난감 자동차를 라즈베리 파이와 모터 드라이브를 이용하여 제어하는 시스템을 구현하였다. 이 연구를 통해 일반 장난감 자동차를 RC 카로 만들거나 추가적인 개발로 학습을 하고 자율주행을 하는 등의 발전을 시킬수 있을 것이다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 F
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• pp.2754-2757
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• 1999

This paper describes the development of the linear pulse motor (herea-fter, LPM) and the driver system to control the quantity of fuel in the nuclear furnace. The LPM developed in this study is a kind of the linear motor with the properties of moving up and down, and both the stator and the mover of the LPM are designed as the salient type. Especially, the stator has windings but there is no windings or magnet on the mover. To Maximize the characteristics of the LPM, we chose the asymmetric bridge converter as the driving system for LPM.

• 전력전자학회논문지
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• 제8권6호
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• pp.519-526
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• 2003

본 논문은 단상 SRM 구동을 위한 1단 방식의 역률 보상형 컨버터에 관한 연구이다. 기존의 SRM 구동에서의 역률 보상회로는 2단 방식의 구조로 구성이 복잡하고 소자의 수가 증가하여 경제적으로 불리한 단점을 가진다. 따라서, 부가적인 회로의 추가 없이 1단 방식의 단위 역률이 가능한 단상 SRM 구동회로를 제안한다. 제안된 회로에 대한 타당성을 시뮬레이션과 실험으로 검증한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 F
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• pp.2112-2114
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• 1998

A gate driver suitable for forced switch-mode power converters such as UPS and motor drive system is presented. The proposed gate driver uses regenerated snubber power and requires no separate power supply. This does not impose any additional complexity on the main switch. Experimental results show that the proposed circuit is valid.

• 한국정밀공학회지
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• 제28권9호
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• pp.1110-1118
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• 2011

The recent power add-on drive wheelchairs (PADWs) provide greater physical activity and easier transportability and may be an excellent alternative for the typical manual and powered wheelchairs. The driving system consists of a motor and a motor driver is the most important component of the PADW In this paper, design, implementation, and testing of a driving system for a PADW are presented. To design the output power and torque for the driving system, the equation of motion has been investigated. The motor and driver were fabricated with precise machining and assembled to implement our prototype driving system. The dynamometer test has been carried out using the prototype in order to examine the torque of the system. The experimental results demonstrates that the designed driving system can provide enough output power and efficiency for utilization in a PADW.

• Journal of Electrical Engineering and Technology
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• 제12권5호
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• pp.1851-1863
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• 2017

Interior permanent magnet synchronous motor (IPMSM) is most commonly used in the automotive industry as a traction motor for electric vehicle (EV). In electric vehicle, the torque output rapidly changes according to the operation of the accelerator and the braking of the driver. The transient torques are thus generated very frequently in accordance with the variable speed control of the driver. Therefore, in this paper, a method for improving the torque response in the transient states of IPMSM is proposed. In order to complement the disadvantages of the conventional PI current controller in the field oriented control (FOC), the finite-state model predictive current control and 2D-LUT is applied to improve the torque response at the torque transient period. Simulation and experiment results are given to verify the reliability of the proposed method.

• Journal of Astronomy and Space Sciences
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• 제20권2호
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• pp.153-162
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• 2003

인공우주물체의 추적 및 관측을 위해 LX-200 12인치 망원경시스템을 도입하여 시스템의 구동부(모터, 모터드라이버, 모션컨트롤러)를 응답특성이 빠르고 능동제어가 가능한 것으로 개선하였다. 또한, PC를 이용하여 대상물의 실시간 궤적정보를 계산하여 모터 드라이버 내의 PID 제어기에 신호를 제공하였고, 명령신호 제어주기도 20ms까지 줄였다. 그 결과, 가대의 구동속도는 $18^{circ}/sec$로 향상되고 상용시스템보다 응답속도가 빠르며 대상물의 이미지 관측시 flipping 현상을 최소화하는 시스템을 개발하였다.

• 한국정밀공학회지
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• 제16권9호
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• pp.34-40
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• 1999

In order to establish the design technique of the robust current controller in d.c series wound motor driver system, this paper proposes a method of the compensated Bang-Bang current control using d.c series wound motor driver system under the improperly variable load to get minimum time for the torque control. The compensated Bang-Bang current controller structure is simpler than that of PID plus Bang-Bang controller. This paper shows that a general 16 bits microprocessor is efficiently used to implement such an algorithm. The calculation time of software is extremely small when compared with that of conventional PID plus Bang-Bang controller. Both nonlinear operating characteristics of digital switching elements and describing function methods are used for the analysis and synthesis. Real-time implementation of the compensated Bang-Bang current controller is achieved. The concept of design strategy of the control and the PWM waveform generation algorithms are presented in this paper.