• Title, Summary, Keyword: electric machine

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Change of Main Body Temperature and Reduction of Energy Consumption in a 1 Tube 2 Chamber Bent Silkworm Type Dyeing Machine

  • Lee, Choon-Gil;Woo, Kyung-Sung
    • Fashion & Textile Research Journal
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    • v.4 no.6
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    • pp.550-556
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    • 2002
  • The changes of the main body temperature of a I tube 2 chamber bent silkworm type dyeing machine and the reduction of energy consumption of the dyeing machine by the energy saving design are reported. This dyeing machine was developed for the purpose of the energy saving and high efficiency. In this study, the changes of the main body temperature of the 1 tube 2 chamber bent silkworm type dyeing machine were studied experimentally. Especially the effect of the blower motor electric current and the main body pressure at various blower frequencies were studied experimentally. In the experimental data for the changes of main body temperature, it was shown that the main body temperature increased as the blower motor electric current and the main body pressure increased.

A Experimental Study on the Fire Hazards in Drum-Type Electric Washing Machine (건조일체형 드럼세탁기의 화재위험성에 관한 실험연구)

  • Hong, Sung-Ho
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.57 no.3
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    • pp.328-331
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    • 2008
  • This study presents on the analysis fire hazards of drum type electric washing machine. In order to analyze fire hazards fire experiment is conducted. The fire experiment is conducted to simulate under the normal condition and abnormal condition. The experiment under the abnormal condition is simulated in safety device failure, situation of accumulated dust and tracking phenomenon caused by humidity. The results show that fire hazard is high at the abnormal condition. In this paper, we suggest to use the safety device of low operating temperature in electric washing machine for reducing fire hazard.

Developed Compact Injection Molding Machine for Desktop (탁상용 소형 사출 성형기 개발)

  • Lee, Byung-Ho;Shin, Dong-Hwa
    • Journal of the Korean Society of Industry Convergence
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    • v.21 no.5
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    • pp.257-263
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    • 2018
  • It is a small injection molding machine for table top considering the material heating mechanism and the design and structure stability by securing the mechanism that compresses the inside of the material heating tube by using the electric actuator and by providing space between the body and the material heating tube to reduce heat loss Develop body. An electric actuator suitable for applying pressure to the inside of a material heating tube is a mechanical system composed of a rigid structure. Since a large force is repeatedly applied to the electric actuator and the push rod, the interaction between the moving parts and the dynamic Maximum stress through analysis and prediction of fatigue life of critical parts The pushrod reflects the structural analysis results of the electric actuator and the push rod, and pushes the inside of the material heating tube by the push rod to inject the molten material from the nozzle into the mold. The pushrod operates by the operation of the electric actuator. The material heated by the coil heater is ejected through the nozzle by the pressure of the material heating tube, and the material heating tube and the nozzle are also lowered at the same time as the push rod is lowered, so that the material is closely adhered to the mold. We want to study the completion of the injection.

Design and Characteristics Analysis of Induction machine for Diesel-Electric Hybrid Engine (디젤-전기 Hybrid 엔진용 유도기의 설계 및 특성해석)

  • Cho, Y.H.;Lee, J.B.;Koo, D.H.;Ha, H.D.;Ryu, W.H.
    • Proceedings of the KIEE Conference
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    • pp.27-29
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    • 1995
  • This paper presents the design and characteristics analysis of induction machine for diesel-electric hybrid vehicle powertrain. Diesel-electric hybrid vehicles are very efficacious in reduction of consumption energy, environment pollution and saftly yields with high dynamic of machines. However, their sophisticated construction requires from designers both complex made-technology and control strategy which would be able to put into practice this requirements. These problems are still considered in processing the design and analysis of induction machine. The requirements for a given volume, input power to weight ratio, high efficiency and wide speed range are met by the induction machine.

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The study on characteristics of operating limit of electric machine under the effects of Sag (순간전압강하에 대한 저압전기기기의 운전특성에 관한 연구)

  • Lee, Hyun-Chul;Gim, Jae-Hyeon;Jung, Sung-Won;Lee, Geun-Joon
    • Proceedings of the KIEE Conference
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    • pp.113-114
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    • 2008
  • For the supported high-technology, it is in need of estimation about power quality and reasonable price through machinism. The power system made much of precision digital industrial damage under sag. This study suggested electric machine under effects of power quality in the theory and test. A electric machine was simulated and experimented about sag. The test system made up IPC as voltage sag device. The test machine was magnetic contactor and PLC. The result, electric machines appeared to influence sag with CBEMA curve. It was make possible analysis of power system about a fault. This study was expected to method that investment and development of equipment on power market in the future.

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Data Interworking Model Between DLMS and LwM2M Protocol (DLMS와 LwM2M 프로토콜 간 데이터 연동 모델 연구)

  • Myoung, Nogil;Park, Myunghye;Kim, Younghyun;Kang, Donghoon;Eun, Changsoo
    • KEPCO Journal on Electric Power and Energy
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    • v.6 no.1
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    • pp.29-33
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    • 2020
  • Despite the same system architecture and operation principle, Advanced Metering Infrastructure (AMI) and Internet of Things (IoT) are recognized as a heterogeneous system. This is due to the different object modeling and communication protocols used in smart meters and sensors. However, data interworking between AMI and IoT is expected to be inevitable in the future. In this paper, we propose Device Language Message Specification (DLMS) to Lightweight Machine to Machine (LwM2M) conversion model. The proposed interworking model can reduce the packet size by 46.5% compared to that of the encapsulation method.

The Study of Monitoring System for Enhancement Electrical Point-machine Maintenance (전기선로전환기 유지보수 향상을 위한 모니터링 시스템의 연구)

  • Park, Jae-Young
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.11
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    • pp.3115-3120
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    • 2009
  • An electric point-machine which changes over a turnout so that it enables a train to be operated in the routine that a train is to proceed has been installed and used in most of the railways such as not only urban railways but also main-line railways. Most of the maintenance works in this electric point-machine is that the maintenance workers manually measure motor power, control power and display power in the site with the use of portable counters. Especially in case of NS or NS-AM electric point machine, the maintenance cycle is so frequent that during the operation casualty accidents caused by carelessness occurs as well as more staff is required for this measurement. In this paper we propose a system for monitoring the state of electric point machine installed in the site to improve maintenance efficiency and it is expected that this monitoring system confirms any measured values on electric point machines in real-time and improves maintenance efficiency.

A Study on Energy-Saving High-Frequency Inverter Welding Machine with Noise Cut Transformer (노이즈 차폐 트랜스로 구성한 에너지 절감형 고주파 인버터 용접기 개발에 대한 연구)

  • Kang, Yun-Ki;Chae, Young-Min;Choe, Gyu-Ha;Ro, Chung-Yun
    • Proceedings of the KIEE Conference
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    • pp.420-423
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    • 1995
  • The electric arc welding machine with high-frequency inverter is studied in this paper which could make more saving in energy than conventional ones with inherent low efficiency. The inverter circuit has been already adopted to special welding machines such as MIG and TIG for improving operating performances so much. But this adoption has not be applied to conventional ac arc welding machine until now. The proposed technology for higher efficiency is to apply the high frequency inverter, together with noise-cut transformer. Overall output characteristics are investigated in aspect of cost and circuit performance. The proposed system is conducted practical experiments using PWM controller.

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Design Considerations and Validation of Permanent Magnet Vernier Machine with Consequent Pole Rotor for Low Speed Servo Applications

  • Chung, Shi-Uk;Chun, Yon-Do;Woo, Byung-Chul;Hong, Do-Kwan;Lee, Ji-Young
    • Journal of Electrical Engineering and Technology
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    • v.8 no.5
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    • pp.1146-1151
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    • 2013
  • This paper deals with design consideration and validation of a new pole-slot combination for permanent magnet vernier machine (PMVM) with consequent pole (CP) rotor especially for extremely low speed servo applications. A 136pole-24slot PMVM with CP rotor is introduced and analyzed by 2D and 3D finite element analysis (FEA) and discussion on experimental validation is also included.

Optimization of a Flywheel PMSM with an External Rotor and a Slotless Stator

  • Holm S.R;Polinder H.;Ferreira J.A.
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.5B no.3
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    • pp.215-223
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    • 2005
  • An electrical machine for a high-speed flywheel for energy storage in large hybrid electric vehicles is described. Design choices for the machine are motivated: it is a radial-flux external-rotor permanent-magnet synchronous machine without slots in the stator iron and with a shielding cylinder. An analytical model of the machine is briefly introduced whereafter optimization of the machine is discussed. Three optimization criteria were chosen: (1) torque; (2) total stator losses and (3) induced eddy current loss on the rotor. The influence of the following optimization variables on these criteria is investigated: (1) permanent-magnet array; (2) winding distribution and (3) machine geometry. The paper shows that an analytical model of the machine is very useful in optimization.