• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 B
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• pp.1143-1145
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• 2000

In this paper, it presents the design and implementation of a Microstep control IC using Programmable Logic Device(PLD). A Microstep driver is implemented with a 5-phase hybrid stepping motor, which has a Pentagon winding, power MOSFETs, and some devices to improve the system characteristics. The Microstep driving method is used for high performance motion control, low vibration and low noise in motor control system. The improvement of the electrical and mechanical driving characteristic of a step motor is achieved by applying microstep driver.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(I)
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• pp.746-748
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• 1987

A volocity and an efficiency of an induction motor are lower than those of a DC motor. But in the control, the utility of an AC motor is more enlarged with the development of inverter. But unfortunately, in using the induction motor, it include a lot of harmonics because of switching of semi-conductor devices(SCR or Tr) in the inverter. In PCR, as the change of a firing angle $\alpha$, harmonics are changed. Hence, in this thesis analyze the harmonics and provide the region of it's application when PWM and 6-step applied to inverter. Of course, frequencies of inverter changed. Especially, in PWM a carrier ratio is changed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 추계학술대회 논문집 학회본부 B
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• pp.250-252
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• 2000

A simple analysis method for inverter-fed induction motor using F.E.M and equivalent circuit is proposed. And an optimum shape of rotor slot for 2Hp inverter-fed induction motor is determined by combining the proposed analysis method and an optimization algorithm. Conjugate gradient method is used for the optimization algorithm. The optimization is performed for higher efficiency and reduction of harmonic loss in the inverter-fed induction motor. The optimization results are verified by comparing with those of the time-step F.E.A and the experiment.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.134-136
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• 2001

In this paper, using equivalent circuit of BLDC motor in the 30W class, process of modeling the BLDC motor and calculating the parameter is shown. Through run-down-test and measuring back EMF, torque, speed and ampere, parameter that transfer function requires was gotten. In this result, for step response of BLDC motor, comparing the actual result obtained by circuit experiment with the simulation result obtained by substituting this parameter into the transfer function, it was established that process calculating parameters in this study is proper.

• Nuclear Engineering and Technology
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• 제55권8호
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• pp.3114-3120
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• 2023

A high-accuracy magnetic field measurement device based on a cyclotron is being developed for accelerator mass spectrometry (AMS). In this study, a magnetic field measurement device consisting of a Hall probe sensor, piezo-motor, and step motor was developed to measure the magnetic field of the AMS cyclotron magnet. The Hall probe sensor was calibrated to achieve positional accuracy by using polar coordinates. The measurement results between the ratchet gear and piezo-motor, which are the instruments used for driving the measurement device, were analyzed. The measurement result of the device with a piezo-motor exhibits a difference of 5 Gauss (0.04%) as compared with the simulation result.

• 대한기계학회논문집 C: 기술과 교육
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• 제4권1호
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• pp.63-71
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• 2016

최근에 기계공학 교육에서 메카트로닉스 교육의 중요성은 많이 인식되고 있으나, 일반적으로 장비가 갖춰진 실험실에서만 실험실습교육이 이루어지고 있어, 학생들이 집에서 실습해 볼 수 없는 불편함이 있어왔다. 본 논문에서는 5V 소형전원, 브레드보드, 마이크로컨트롤러 및 각종 전자칩류, 스텝모터, 전기소자류, LED 등 소형 휴대용장비와 학생의 PC 를 활용하여, 디지틀논리회로, 7-LED 구동, 사각파신호생성, 마이크로컨트롤러 어셈블리 및 C 프로그래밍, 타이머 인터럽트, 스텝모터 구동 등을 실험실습하는 교육에 대해 소개한다. 개발된 강좌에서는 내용강의와 더불어 실험실습을 병행하되, 학생들에게 편리하고 값싸게 실험실습을 수행할 수 있는 환경을 제공하여, 학생들이 집에서 실험실습을 예습 및 복습할 수 있게 하였다.

• Journal of Platform Technology
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• 제8권1호
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• pp.24-32
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• 2020

본 논문은 SMT라인의 핵심 기술인 칩마운터의 보급을 위해 교육연구용이나 샘플제작을 목적으로 사용이 가능한 3D 프린터 기술기반의 칩마운터를 설계하고 제작하였다. 저가형 구동부 설계를 위해 오픈루프제어가 가능한 스텝모터를 사용하였다. 스텝모터 사용으로 발생하는 모터의 진동, 탈조 등의 특성상 단점은 마이크로스텝제어 방법을 이용하여 보완하였다. 칩마운터 실험은 제작한 소형 칩마운터에 거버파일을 생성하고 실제 크기로 프린트하여 샘플보드 제작과 동일한 방법으로 HASL 처리되어 있는 PCB에 솔더크림을 프린팅한 후 부품을 실장하여 여러 번 반복해서 수행하였다. 실험결과 2012 미소부품과 달리 보정이 필요한 SOIC, TQFP 등의 부품은 부품 실장 시간이 2배정도 길었지만 비교적 정확히 실장되는 것을 확인할 수 있었다. 또한, 초기 위치에 대한 오차를 총 10회에 반복하여 측정한 결과 약 0.110mm의 비교적 적은 오차가 발생함을 확인할 수 있었다.

• 전기의세계
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• 제21권2호
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• pp.5-8
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• 1972

The purpose of this paper is, as a preliminary step to study on the method of analysing the torque of toothed solid iron rotor, to make an inquiry into the torque calculation formula of homogenious solid iron rotor without slot. The starting point for its theoretical analysis on torque generated by eddy current in solid iron rotor is based on the maximum air gap flux density. In solid rotor induction motor, torque generated by rotor core is considerably large in the range of large slip. The calculated value and observed value on the test machine are also examined in this paper.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.1115-1119
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• 1996

The objective of this paper is to study on the idle speed control sing the fuzzy logic controller under load disturbance. The inputs of the fuzzy controller are error of rpm and rpm variation. The output of fuzzy controller is an ISC motor step. The airflow is controlled by the ISC motor movement and the idle speed is controlled by the airflow control. During the control, air to fuel ratio was checked by LAMBDA sensor. All experiments were carried in real vehicle.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 B
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• pp.803-805
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• 1999

Robust fuzzy logic control, PID control, and sliding mode controllers are designed to control the speed of a third order linear time-invariant model of a motor. The step response performance of each controller, applied to the motor plant, is Presented. We conclude fuzzy logic control can be a useful tool for the control engineering.