• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.170-172
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• 2003

Among low power servo applications, classical DC motors are very popular because they are reasonably cheap and easy to control. The main disadvantage is the mechanical collector which has only a limited life period. Also, brush sparking can destroy the rotor coil, generate EMC problems. So permanent magnet brushless do motors and drives are being used increasingly in a wide range of applications. This has been made possible with the advantages of high performance permanent magnets with high coercively and residual magnetic, which make it possible for the PM to have superior power density, torque to inertia ratio and efficiency, when compared to an induction or conventional dc machine. This paper presents the design of a PM brushless dc motor drive simplistically operates as a classical dc motor. The BLDC motor drive system for this paper composes to the power integrated circuits, the one chip device. And several simple semiconductors add to drive system for a motor drive system simplistically operates as a conventional dc motor. Test results confirmed the feasibility of the proposed motor drive system design.

• Journal of Advanced Marine Engineering and Technology
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• 제17권3호
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• pp.60-69
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• 1993

The speed control associated with dc servo motors for direct-drive applications of mobile robot is considered in this study. Robot is moved by power wheeled steering of two dc servo motors mounted to it. In order to cooperate with micro-computer and to achieve the high-performance operation of dc servo motor, speed control system is composed of a digital Phase Locked Loop and H-type drive circuit. And the motor is driven by Pulse Width Modulations. In controlling PWM, it is modified to compose of H-type drive circuit with feedback diodes and switching transistor and design of control sequence so that it may show linear characteristics. As a result, speed characteristics of motor showed linear features. In order to get data on design of PLL control system, the parameters of 80[W[ motor & robot device is measured by simple software control. The PLL speed control system is schemed and designed by leaner drive circuit and measured parameters. A complete speed control system applied to 80[W] dc servo motor showed good linearity, stability and high response. Also, it is verified that the PLL speed control system has good compatibility as a mobile robot driver.

• 전기학회논문지P
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• 제62권4호
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• pp.175-180
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• 2013

This paper presents the design and implementation of a Bicycle Locker System. Generally DC motor has been used to control a Bicycle Locker System, but DC motor system requires frequent maintenances and its power efficiency is comparatively poor especially under heavy load conditions. In order to improve this difficulties, this paper adopts BLDC motor for a Bicycle Locker System and its motor controller is developed. The performances of locker units are compared between DC motor unit and BLDC motor unit. The motor power consumptions between two motors are discussed. Test results verify that power efficiency of the suggested BLDC drive unit is considerably improved compared to the DC drive unit with load condition.

• 한국공작기계학회논문집
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• 제13권2호
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• pp.88-93
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• 2004

The main objective of the research is to Propose an algorithm that to estimate the screwing torque from parameters of DC motor current without using any stain gage and torque cell. The auto screw drive system is divided into two parts, one is the DC motor ind the other is mechanical part in which the friction torque and damping ratio are a function of rotational of spindle electro motive force constant. The torque is estimated from the friction torque. The research is concerned with applying the method to an auto screw drive and the advantages and limitations are also discussed in this paper.

• Journal of Electrical Engineering and Technology
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• 제11권2호
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• pp.470-479
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• 2016

The model based method for energy saving of the separately excited DC motor drive system is proposed in the paper. The accurate power loss model is necessary for this method. Therefore, the adaptive tabu search algorithm is applied to identify the parameters in the power loss model. The field current values for minimum power losses at any load torques and speeds are calculated by the proposed method. The rule based controller is used to control the field current and speed of the motor. The experimental results confirm that the model based method can successfully provide the energy saving for separately excited DC motor drive. The maximum value of the energy saving is 48.61% compared with the conventional drive method.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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• pp.546-549
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• 2008

Hyundai Motor Company has made an effort to develop fuel cell electric vehicle and its subsystem in recent years. This paper deal with the development of electric drive system applied to Hyundai's fuel cell electric vehicle. This system is composed of three main components such as motor, inverter and DC/DC converter. The specifications of each system is introduced briefly and experimental result of its main components is presented. In addition, we introduce the development status of power semiconductor device, film capacitor, inductor and permanent magnet.

• 한국산학기술학회논문지
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• 제9권2호
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• pp.352-359
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• 2008

본 논문에서는 모델기반의 제어기 설계 프로그램인 National Instruments(NI)사의 System Identification Toolkit과 Control Design Toolkit, Simulation module을 사용하여 기존의 제어기 설계방식보다 쉽고 편리하게 제어기를 설계할 수 있었다. 직류전동기의 속도제어시스템을 구현하기 위해서 하드웨어는 NI사에서 제공하는 실시간 제어기(Real-Time Controller:RT) CompactRIO를 사용하였다. 먼저는, 테스트 입력 신호를 전동기에 인가하고 얻은 출력신호를 통해 제어대상 플랜트인 직류전동기 구동시스템의 전달함수를 구할 수 있었다. 다음으로는 원하는 제어응답성능을 갖는 극점, 영점 제어기를 설계한 후, 모의실험을 통해 속도제어응답을 확인할 수 있었고, 실시간 프로그램으로 다운로드하여 실제 전동기 구동시스템의 실험을 통해서 설계된 속도제어기의 응답 결과를 모의실험과 비교하여 검증하였다.

• 전력전자학회논문지
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• 제8권4호
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• pp.336-343
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• 2003

일반적으로 브러시리스 직류 전동기의 운전을 위한 회전자의 위치정보와 여자시점 검출을 위해서는 홀센서나 엔코더와 같은 측정 장치가 요구된다. 본 논문에서는 부가적인 검출 장치를 사용하지 않고 각 상의 단자전압을 분석하여 여자 시점뿐만 아니라 회전자의 절대위치를 검출 할 수 있는 센서리스 운전 시스템을 제안한다. 더불어, 제안한 알고리즘을 10k[W]급 전동기에 적용하여 유효성과 타당성을 검증한다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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• pp.414-419
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• 1998

This paper describes the dynamical performance of a four-quadrant circulation current mode control of dc motor drive, using the controlled flywleeling technique, a four-quadrant closed-loop control drive with an inner current control loop and a speed fuzzy PI regulator is designed. The obtained computer simulation results of a dc motor drive below and above the base speed are demonstrated. These result show that compare to a conventional dual-converter-fed dc motor drive with simultaneous control, the overal system performance has been improved and also, agood stability and robstness has been achieved.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1954-1955
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• 2007

This paper presents a modeling method of speed controller for DC motor drive system by using the Embedded Target for TI C2000 DSP in MATLAB/SIMULINK. Speed controller is easily designed and implemented by using the MATLAB/SIMULINK program, and speed control response and stability of the DC motor can be improved. Feedback of motor speed is processed through C28x QEP(Quadrature Encoder Pulse) from encoder pulse. The controller is designed as PI speed controller. Simulation program is drawn using SIMULINK. Then a real-time program for speed control of the DC motor is downloaded into the eZdsp F2811 control board. Speed control response is verified through simulations and experiments.