• Title/Summary/Keyword: 모터와 감속기

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버츄얼 로봇 설계 프로그램 기반 로봇 요소품 설계 프로그램 개발

  • 김창수;정일호;전맹관;황철하;박태원;최재락;최용원;변경석
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.05a
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    • pp.271-271
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    • 2004
  • 다양한 목적으로 개발이 요구되는 로봇의 작업환경과 운동능력에 맞게 로봇을 개발하기 위해서는 다음의 설계 과정을 필요로 한다. 하나, 로봇의 전체 설계 중 개념설계/기초설계로 로봇링크의 길이나, 작업영역에 대한 설계 변수를 결정하는 로봇 기구설계. 둘, 로봇 상세설계로 작업을 실행하는데 필요한 운동능력에 대한 설계 변수를 결정하는 로봇 동역학 설계. 셋, 로봇 기구, 동역학 설계를 기초로 하여 로봇이 최적의 성능을 발휘할 수 있는 로봇 부품들에 대한 요소품 설계가 있다.(중략)

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Development of electric Four Wheel Drive System (e-4WD 시스템 개발)

  • Jo, Hee Young
    • Journal of Drive and Control
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    • v.13 no.1
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    • pp.10-17
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    • 2016
  • e-4WD(Electric-4WD) system is a 4WD(4-Wheel Drive) System that can transform a car into a Hybrid System. e-4WD consists of a Motor, Inverter, Speed reducer and Clutch. The Motor, Speed reducer and Clutch are installed on the rear sub-frame as a chassis module type. The inverter is installed separately. Compared to a mechanical 4WD, the e-4WD system has many advantages. For example, the reduced number of drivetrain components makes better use of the space. Driving with a motor only at low speed improves fuel economy and reduces exhaust gas. Engine downsizing is available because the motor assists the engine. The performance of a conventional HEV(Hybrid Electric Vehicle) system can also be maintained. This paper proposes the specifications of components and the control logic for an e-4WD System. And the effect of the e-4WD system is proven using a test vehicle equipped with components under various test conditions.

A Study on the Improvement of Driving Stability for the Motorized Manual Wheelchair INMEL-VII (전동화 수동 휠체어 INMEL-VII의 주행 안정성 개선에 관한 연구)

  • Jeong, Dong-Myeong;Go, Su-Bok;Kim, Ju-Myeong
    • Journal of Biomedical Engineering Research
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    • v.16 no.4
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    • pp.543-554
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    • 1995
  • This paper describes the improvement of driving stability and the control system for INMEL-VII which is motorized manual wheelchair to satisfy requirements of the disabled The INMEL-VI was based on high maneuverability of the omnidirection drive and safety But the results of field tests about two years showed some problems to the disabled in daily life such as driving stability, Pm switching noise, and rotation of motor without driving command on negative slope. To solve the problems due to an increased DC motor power and applied to direct connection method in INMEL- VII. It improved the driving circuits and set switching frequency to 5KHz to eliminate the switching noise caused by PWM control of DC motor, As compare with the INMEL-VI, INMEL-VII is improved in driving stability by transfer the weight center to forward. The results of field testing proved the improvement of the driving stability and software algorithm It has been estimated to have a hlgh practical use for powered walking aids to the disabled's daily life.

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A Study on the Design of Upward and Downward Traverse Units in an Automatic Object Changer Unit to Establish a Flexible Production System (Part 1) (유연생산 시스템 구축을 위한 공작물 자동교환 유닛의 상하 이송 기구 설계에 관한 연구(파트 1))

  • Park, Hoo-Myung;Kang, Jin-Kab;Lee, Yong-Joong;Ha, Man-Kyung
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.7 no.2
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    • pp.45-51
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    • 2008
  • The objective of this study is to develop an automatic object changer unit to improve processing problems existed in the conventional horizontal machining center. In order to perform this objective, a upward and downward traverse unit in which a unit that consists of a motor and reducer, chain and sprocket wheel, and upper and lower base employed in an automatic object changer unit performs sliding contact motion in a frame was designed. To achieve this design, constraint conditions for the upward and downward traverse unit first designed. Then, an operation mechanism was designed and that was introduced as a sum of kinetic energy for the sprocket wheel and upper and lower base based on the moment of inertia, which is the kinetic energy of the converted upward and downward traverse unit in the side of the reducer. In addition, The work required to rotate the converted upward and downward traverse unit in the side of the reducer by one revolution can be calculated using the sum of work that is required in the sprocket wheel and upper and lower base that is a part of the upward and downward traverse unit. Furthermore, the converted equation of motion in the side of the motor can be introduced using the equation of motion using the converted upward and downward traverse unit in the side of the motor. Then, Then, a proper motor can be determined using predetermined specifications employed in the motor and several parameters in the upward and downward traverse unit in order to verify such predetermined specifications. Also, a design of a horizontal traverse unit that performs sliding motion on a upward and downward traverse unit and simulation that verifies the results of this design are required as a future study.

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Design of Electric Automatic Manual Wheelchair Driving System (수·전동 휠체어 구동부 시스템 설계)

  • Kim, Jin-Nam
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.11
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    • pp.5392-5395
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    • 2013
  • Application of electric wheelchair, sort of wheelchair which is playing important role in transporting patients and old people, has been increasing. In this study, we designed the electric wheelchairs' driving system. Using the multi-step gear, the driving system can get great power, even though the small capacity of motors. First, we designed the multi-step gear, test its bending strength and contact strength, as well as verified its performance. We installed 'B-type electric brake(Multiple plate clutch, Anti-magnetization) in same axle of the driving system, so it is possible to stop under huge torque and small size. Using this driving system of the multi-step gear which we designed, it's possible to improve driving gear efficiency 30% up and create the high-competitive electric wheelchair. And, it is easy to repair and control.

Development of Monitoring System for Safety Operation of Crane (크레인 안전 운전을 위한 모니터링 시스템 개발)

  • Bae, Young-Chul
    • The Journal of the Korea institute of electronic communication sciences
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    • v.9 no.11
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    • pp.1305-1310
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    • 2014
  • In this paper, the new integrated crane monitoring system that complemented the point at issue for existing crane monitoring system is implemented. The Implementing monitoring system based on wireless communication system, consist of a measuring system of total load currents of main circuit breaker, a temperature and vibration measuring system with temperature sensors and vibration sensors for monitoring an oil and bearing of a main decelerator, a temperature measuring system with temperature sensors of a main motor bearing, and sensors for fire monitoring of an entire electrical space. The measured data from these sensors transmit main controller which is located in external location. Then the Integrating monitoring system is implemented and is performed the performance test to performing diagnosis of motors of a crane.

Analysis of Pole Ratio Effect of Magnetic Reducer (마그네틱 감속기의 극수비 영향 분석)

  • Jung, Kwang Suk
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.1
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    • pp.277-283
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    • 2020
  • In a concentric magnetic gear, which replaces the teeth of a mechanical gear with a permanent magnet, the polar ratio of the magnet that determines the reduction ratio affects the behavior of the magnetic gear dramatically. This study analyzed the density of transmission torque, the efficiency of torque considering the solid loss, and the torque quality, including the cogging characteristics using finite element analysis. When the pole number on the driving side was changed from two to five, it was confirmed that there was an optimal pole ratio, in which the transmission torque was maximized. Because eddy current generation density is proportional to the magnetic field, the transmission efficiency also shows a similar tendency to the transmission torque density, and the efficiency is more than 95% at a low gear ratio. The cogging characteristics due to the interaction of the permanent magnets with the limited number of poles are inversely proportional to the least common multiple between the number of magnets on the drive side and the number of modulator teeth. A test model was built for the transmission torque evaluation.

Design and Implementation of Driving System for Face Tracking Camera using Fuzzy Control (퍼지제어를 이용한 얼굴추적 카메라 구동 시스템의 설계 및 구현)

  • 이종배;임준홍
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.40 no.3
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    • pp.127-134
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    • 2003
  • In this paper, the speed control problem of moving camera is investigated for tracking the movement of the human-face. The camera system with pan-tilt mechanism sends an image to PC and PC sends back tracking coordinate to the camera. Then the camera tracks a human face in real time. The speed of the stepping motors for moving the camera must be controlled to the target region fast enough and smoothly, In this paper, a fuzzy logic controller is proposed for driving step motors. By creating driving acceleration and deceleration speed Profile, the speed of the motors is controled fast and smoothly. Experiments are performed to show the effectiveness of the proposed method.

PLL-type Position Control of Step Motors (스텝모터의 PLL 타입 위치제어)

  • Kim, Chang-Hwan
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.49 no.4
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    • pp.69-77
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    • 2012
  • We propose a PLL-type position control method for step motors. Our control method considerably improves the instability problem at rapid acceleration or deceleration, which is a major problem of conventional open loop control methods. Moreover, our controller reduces the steady state position error to zero and guarantees lower vibration and acoustic noise at high speed. Also, our controller can produce more torque at high speed, and hence it can extend the controllable velocity range. To demonstrate the practical significance of our control method, we present some simulation results for a commercially available step motor using Simulink.

Experimental Consideration for Vibration Noise, Heat Evaluation on High Speed Mixer (고속 교반기의 진동소음, 열특성 평가를 위한 실험적 고찰)

  • Lee, Jin-Kab
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.9 no.6
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    • pp.1529-1534
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    • 2008
  • Recently, mixers are being widely used in the display and semiconductor company in order to mix the chemical materials. The mixer normally consists of shaft, hub, reduction gear, and driving motor. It is one of the key design factors to evaluate the dynamic characteristics caused by the rotation. In this study, the dynamic characteristics of the high speed mixer, such as vibration, noise and thermal radiation, are verified by the experiment. Through the experiment, it is shown that the structural unbalance mass of high speed mixer is the important source of the severe vibrations and maximum temperature is mixer bowl.