• Title/Summary/Keyword: motor RPM

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The Analysis of Strength and Driving Characteristic according to Design of Traction Motor for 8200 Electric Locomotive Series (8200호대 전기기관차 견인전동기의 설계에 따른 강도 및 운전특성 해석)

  • Lim, Chae-Woong;Yun, Cha-Jung;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.1
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    • pp.165-170
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    • 2015
  • In this paper, The strength and driving characteristics of it were investigated according to developing the traction motor for 8200 electric locomotive series. For this purpose, Flux density strength was analyzed and then structural strength was investigated such as a stator frame, design of the rotor shaft bearing according to the design process. In addition, the traction motor operating point was analyzed according to slip frequency variation at a power source frequency. As the results of analysis on torque-speed characteristic curve, we was confirmed that traction motor was controlled as torque control prior to motor speed 1610[rpm], power control between 1610[rpm] and 2500[rpm] and breakdown torque control more than motor speed 2500[rpm].

Resonance Noise Control in the Case of Using BLDC Fan Motor (BLDC 모터를 적용한 팬의 공진소음 제어)

  • 양재영;김중래;신대식;이대중;이동현
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2001.11a
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    • pp.512-516
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    • 2001
  • It is recent trend that the manufactures of refrigerator use BLDC motor which RPM is changed by voltage of DC power, instead of induction motor in order to reduce energy consumption and noise radiation. It can be controlled two or more RPM suitable to environmental condition. For example it is operate much lower RPM than normal(usual) in the night. This paper introduce the method of noise control in the case of using BLDC Fan motor for refrigerator.

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Development of Planetary Reduction Motor with Mechanical Power Monitoring and Network Capability

  • Jang In-Hun;Sim Kwee-Bo
    • International Journal of Control, Automation, and Systems
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    • v.4 no.3
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    • pp.359-364
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    • 2006
  • This article describes the useful way to measure the torque and RPM of the geared motor. For this we have made the planetary geared reduction motor including 2 Hall sensors in it and the monitoring system. The monitoring system displays the sensing values (torque, rpm) and the calculated value (power) and it also has the network capability using the Bluetooth protocol. We will show that our solution is much more inexpensive and simple method to measure torque and rpm than before.

Development of Torque Sensor Using the Structural Characteristic of Planetary Gear and Hall Effect Sensor

  • Jang, In-Hun;Sim, Kwee-Bo
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.2058-2062
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    • 2005
  • This article describes the useful way to measure the torque and RPM of the geared motor. For this, we have made the planetary geared reduction motor including the torque sensor unit which consists of hall effects sensor and permanent magnet. Our monitoring system displays the sensing values (torque, rpm) and the calculated value (power) and it also has the network capability using the Bluetooth protocol. We will show that our solution is much more inexpensive and simple method to measure torque and rpm than before.

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The Evaluation of RPM Change in X-Smart According to Power Source: Endodontic Wireless Electronic Motor (근관치료용 무선전기모터인 X-Smart의 전원의 종류에 따른 RPM 변화의 평가)

  • Park, Se-Hee;Jeong, Dong-Bin;Cho, Kyung-Mo;Kim, Jin-Woo
    • Journal of Dental Rehabilitation and Applied Science
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    • v.27 no.1
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    • pp.91-97
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    • 2011
  • The purpose of this study was to evaluate RPM maintenance in X-Smart according to the power supplied by the AC adapter and rechargeable battery. Five new X-Smart were used in this study. A handpiece with rubber disk which has reflective tape was mounted on the vice. To measure the RPM, a non-contact type digital tachometer was used. RPM measurements were recorded every 5 minutes to 180 minutes and repeated 3 times per motor from each power source. To evaluate a difference of the RPM changes, two-way repeated measures were performed using $SPSS^{TM}$ 14.0. All tests were conducted at the 95 percent confidence level. There was no significant difference in the RPM change between the power sources. Continuous use of X-Smart with a rechargeable battery for up to 180 minutes could be safely used as an endodontic wireless motor with a reliable RPM maintenance.

Prediction of Power and Efficiency Requirement of Motor/generator for 500W Class Micro Gas Turbine Generator Considering Losses (손실을 고려한 500W급 마이크로 가스터빈 발전기용 전동발전기의 요구동력 및 요구효율 선정)

  • Park, Cheol-Hoon;Choi, Sang-Kyu;Ham, Sang-Yong
    • The KSFM Journal of Fluid Machinery
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    • v.14 no.5
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    • pp.24-30
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    • 2011
  • 500W class MTG(Micro turbine generator) operating at 400,000 rpm is under development. From the cycle analysis, it is decided that the self-sustaining speed of MTG is 200,000rpm and the generating speed is 400,000 rpm. Therefore, motor should be designed so that it is able to rotate the rotor up to 200,000rpm and generator should designed so that it is able to generate 500W output at 400,000rpm. First step to design motor/generator is to determine the power and efficiency requirement. Not only the power into the compressor and from the turbine at the operating speed but also the mechanical and electrical losses should be considered in determining the power and efficiency requirement. This study presents the procedure and the results of determining the power and efficiency requirement considering the mechanical and electrical losses depending on the rotating speed which is measured from the experiment.

A Study on the development of Explosion-proof type's the terminal box of the ventilator with the control of wind volume and operating time (풍량 및 운전시간 제어 방폭 배풍기 인버터 단자함 개발에 관한 연구)

  • Yoo, DongJoo
    • Journal of Convergence for Information Technology
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    • v.8 no.6
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    • pp.187-192
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    • 2018
  • This thesis is about the study of inverter terminal boxes in a explosion proof type exhaust fan that can control wind volume and operating time. In Korea, there is no ventilator to adjust the amount of wind and operating time when working in poor conditions. The purpose of the project is to create a explosion terminal box that can control the operating time and wind speed of a suitable explosion ventilator in hazardous environments. The two explosion-proof switches allow the operation time to be driven 1 hour, 3 hours and continuous time, and the speed of the induction motor rotation was set in 3 stages at 2000 rpm, 2600 rpm and 3000 rpm to control the volume. The tested motor used a half-horsepower barrier three-phase induction motor and a full-bridge inverter to set the desired flow rate and operating time.

The Development of 150HP/ 70,000rpm Super High Speed Motor Driver for Direct Drive Method Turbo Compressor (직접 구동방식의 터보 압축기를 위한 150마력,70,000rpm 초고속 전동기 구동 시스템 개발)

  • 권정혁;변지섭;최종경
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.40 no.1
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    • pp.45-54
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    • 2003
  • Turbo compressor needs high speed rotation of impeller in structure, high rated gearbox and conventional induction motor. This mechanical system increased the moment of inertia and mechanical friction loss. Resently, the study of turbo compressor applied super high speed motor and drive, removing gearbox made its sire small and mechanical friction loss minimum. This paper describes the implementation of the vector control schemes for a variable-speed 131㎾ PMSM(Permanent Magnet Synchronous Motor) drive in super-high speed application.

Rotating Shaft Vibration Analysis of 200 kW, 15,000 rpm 3 Phase Induction Motor (200 kW급 15,000 rpm 3상 유도전동기의 회전축 진동해석)

  • Hong, D.K.;Koo, D.H.;Woo, B.C.;Hong, S.S.;Kwon, Y.S.;Kang, H.C.;Ahn, C.W.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.05a
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    • pp.262-265
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    • 2006
  • The purpose of this study is to design 200 kW, 15,000 rpm 3 phase induction motor. This research deals with natural frequency and mode shape of rotating shaft of 3 phase induction motor with bearing stiffness by finite element analysis. We present natural frequency characteristic variation of rotating shaft according to change bearing stiffness. Also we are verified stability of rotating shaft from backward and forward critical speed by campbell diagram.

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