• 융합신호처리학회 학술대회논문집
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• 한국신호처리시스템학회 2006년도 하계 학술대회 논문집
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• pp.77-80
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• 2006

This paper based on spiral vector, three phase induction motor is described a detailed modeling by a phase segment methode. Based on this model, A torque control and the equation of regenerative power for the induction motor drive, based on the field acceleration method(FAM), is presented. The speed control system is designed to be applied voltage source inverters that is easy the current type feedback of power regeneration for motor drive. The ability of shaving power to be measured power regeneration has been investigated in speed acceleration and reduction. And it is change of stator resistance that the voltage commands include error, the ripple of exited voltage and torque occur from the results. The experimental tests verify the performance of the proposed regenerative drive for FAM, proving that good behavior of the drive is achieved in the transient and steady-state operating conditions.

• 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.

• Journal of Advanced Marine Engineering and Technology
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• 제31권4호
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• pp.417-424
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• 2007

This paper presents a solution that an analytical model for an induction motor and the formula of regenerative power and instantaneous torque are derived. based on the spiral vector. The torque is controlled linearly through variations of the slip angular velocity, based on the field acceleration method (FAM). And also PWM inverter fed induction motor drives is schemed to be easily a regenerative drive. The voltage source inverter fed induction motor drives that regenerative power occurs with back current type is presented, to easily controlled the feedback power and to proper the adaption of energy shaving drives. The experimental tests verify the performance of the FAM, proving that food behavior of the drive is achieved in the transient and steady state operating condition, and are discussed to save the power that regenerative power is measured at the operating acceleration or deceleration of servo system.

• 한국정보통신학회논문지
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• 제9권3호
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• pp.498-503
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• 2005

Turbine Load Set Motor장치는 노후화 된 화력 발전소에서 출력 부하를 결정하는 중요한 장치로서, Motor를 가변하면서 발전 출력 부하를 조정하게 된다. 이러한 종래 발전시스템에서는 Set Up Range를 운영자가 수동으로 조작한 Set Up값에 따라 Motor를 회전시키게 되며, Motor를 포함한 내부적 동작에 의해서 발전 출력 부하 결정이 이루어지게 된다. 따라서 본 논문에서는 수동적으로 출력부하를 작동되는 Turbine Motor Drive Unit를 대처할 수 있는 Digital Drive Unit 장치를 개발하여 기존 Turbine Load Set Motor 성능을 지닐 수 있는 장비를 구현한다. 또한 구현한 Digital Drive Unit을 바탕으로 발전 출력 부하를 결정하는 기본 기능을 기존 Motor Drive Unit과 연결하여 작동될 수 있도록 제어 알고리즘 구현과 구현된 제어 시스템을 통해 기존 Turbine Load Set Motor Drive와 연결 가능성을 확인한다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2003년도 춘계전력전자학술대회 논문집(1)
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• pp.216-222
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• 2003

Today we have excellent motor drive system using high frequency carrier PWM control voltage source inverter in the other hand, we have met serious problems caused by high frequency switching. PWM Cyclo-converter called Matrix converter is expected as the new strategy Possible to improve these problems and add some more convenient features suitable for new drive system. in this Paper, we will introduce the background, features and outline of this converter, and additionally introduce some remarkable activity on this converter

• 전력전자학회논문지
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• 제24권3호
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• pp.147-152
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• 2019

With the recent emphasis on the importance of energy conservation, studies on high-efficiency elevator systems are being continuously conducted. Therefore, pulse width modulation converters are commonly used in traction drives on elevator systems. Wide bandgap devices have been increasingly commercialized, and their application to power conversion systems, such as renewable and energy storage system, has been gradually increasing. In this study, a SiC inverter for an elevator traction drive is investigated. In particular, an inverter is designed to minimize stray and parasitic inductance. Input and output filters are designed by considering switching frequency. The designed SiC inverter reduces volume by approximately 32% compared with that of a Si inverter, and power converter efficiency is over 98.8%.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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• pp.938-943
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• 1998

The induction motor of the electric vehicles is controlled based on the vector control method to obtain good torque control characteristics. In the conventional vector control system, the field exciting current should be kept on a constant value to keep a stable flux level. This method has a liability that core loss becomes increasing at the light load region. To solve this liability, the efficiency maximizing control method of the vector controlled induction motor is proposed in thid paper. We developed light weight water cooled 60kW induction motor drive system which adopts our method and fabricated a conversion electric car for actual vehicle test. We demonstrate the usefulness of drive system by comparing its driving mode with conventional field oriented system and an efficiency maximizing controlled induction motor.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 추계학술대회 논문집 학회본부 B
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• pp.341-344
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• 2000

본 논문에서는 stepper motor 나 BLDC motor를 구동하기 위하여, 최신 microcontroller, PC, control IC board 등으로 구성된 새로운 시스템을 설명하는데 목적이 있다. 이 시스템에서는 인터넷으로 전송되는 microcontroller program를 이용하여 SPDS(smart power development system)을 구동시키고, 이로 인하여 dedicated drive IC를 제어하여 stepper 또는 BLDC motor를 구동시키게 되며, 원격지에 있는 사용자의 motor를 제어함을 목표로 하고 있다. 본 논문에서 사용된 drive IC 는 SGS-Thomson 제품으로써 stepper motor 용으로 L6205/6/7/8, 그리고 BLDC motor 용으로 L6235 이다. SPDS는 ST92F120 16-bit microcontroller를 사용하고 있다. 이 논문에서는 인터넷 Protocol Converter에 의한 프로그램 전송, Operating System Program 및 Driver Software Program의 생성 및 구성, Drive IC의 구성 및 특징, SPDS 의 hardware 및 software 의 구성 등에 대하여 설명한다.

• 한국기계가공학회지
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• 제11권1호
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• pp.88-94
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• 2012

An axle drive shaft with double joint shaft, cross kit and yoke has an important role by transferring power and changing steering angle between axle and wheel in power train system. It has been used widely in the heavy machinery requiring a high reliability in the power train system. At fatigue failures of the axle drive shaft with the long span, a relatively high stress concentration at a snap ring groove on the drive shaft brings to significant fatigue damages under repeated loading condition. As Peterson's suggestions on this study, a relief groove in the vicinity of the snap ring groove is applied by decreasing the stress concentration and improving the fatigue life of axle drive shaft. By using FEM analysis, the decreasing effect of the stress concentration and extended fatigue life are due to the change of design parameters related with size and location of the relief groove. The relief groove with the design parameters such as d/b=2.0 and r/h=1.2 enables to decrease the stress concentration of 22.3% and increase the fatigue life more than 3 times by comparing with no relief groove application.

• 전력전자학회논문지
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• 제9권1호
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• pp.25-29
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• 2004

본 연구는 최근 관심이 높아지고 있는 스위치드 릴럭턴스 전동기(SRM)를 적용한 소형 지게차의 구동시스템 개발에 관한 연구이다. SRM은 스위칭 전원에 적절한 전동기구로서, 전력전자기술의 발달에 힘입어 최근 연구가 활발히 이루어지고 있다. 본 연구에서는 기존 소형 전기지게차에 사용되어지고 있는 직류직권 전동기를 경제적이고 고효율, 견고성, 넓은범위의 속도제어가 가능한 스위치드 릴럭턴스 전동기(Switched Reluctance Motor, 이하 SRM)로 대체하기 위해 저전압용 전동기를 설계하고 이 전동기를 구동하기 위한 구동 시스템을 개발하였다. 또한 실제 전기 지게차에 적용하기 위하여 구동시스템의 운전특성을 확인하였다.