• Title/Summary/Keyword: Motor Cooling System

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Heat Transfer Analysis of Bearing Unit in Submersible Motor Pump (수중 모터펌프 베어링 유닛 열전달 해석)

  • Yun, Jeong-Eui;Byun, Hyung-Kyun
    • Tribology and Lubricants
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    • v.27 no.4
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    • pp.198-203
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    • 2011
  • The purpose of this paper is to find a proper cooling system of bearing unit in the submersible motor pump to extend a life time. To do this, heat transfer analysis of the submersible motor pump were performed using commercial CFD code ANSYS. In order to obtain the resonable heat transfer simulation results, we first set up mathematical model of heat source in the bearing system, and carried out heat transfer analysis with the model. As a results, new type bearing cap which had several ribs for cooling the bearing was proposed. Finally, through the comparison between experimental results of old and new model pump, we proofed that maximum bearing temperature of new model was about 10% lower than that of old model.

Vibration Analysis for Oil Gear Motor considering Pulsation Pressure (맥동압을 고려한 냉각팬 오일 기어모터의 진동해석)

  • Shin, Yoo-In;Yi, Chung-Seob;Jeong, Ung-Gi;Suh, Jeong-Se;Song, Chul-Ki
    • Journal of the Korean Society for Precision Engineering
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    • v.29 no.7
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    • pp.793-798
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    • 2012
  • Oil gear pump is used for the cooling pump system of commercial vehicle. The hydraulic pulsation pressure of oil gear pump is one of the most important reasons for the vibration and noise of the pump. In this study, the several hydraulic factors acting on oil gear motor are analyzed by CFD in operation of cooling system. Forced vibration analysis due to hydraulic pulsation pressure is analyzed by FEA for predicting deformation and equivalent stress.

The Study about the Performance-Analysis of a Automotive Engine Cooling System (엔진 냉각시스템 성능해석에 관한 연구)

  • Shin, Chang-Hoon;Lee, Seung-Hee;Park, Warn-Gyu;Jang, Gi-Lyong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.14 no.2
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    • pp.39-48
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    • 2006
  • An engine cooling system affects overall performances of an engine which has been recently requested higher power in more confined engine room. The design of efficient cooling system demands a great effort to effectively correlate with each components, such as water jacket, radiator, coolant pump, cooling fan, etc. Thus, the aim of this study is to provide the design tool of the cooling system in the early design stage by enabling for the designer to accurately predict the engine cooling performances. This user-friendly design tool has various ways to assemble each components and control the running condition with related database. The present design tool was simulated and compared with experimental data. As a result, the inlet and outlet temperature of the radiator agree very well with experiments. It was concluded that the present design tool could be effectively used for the design of the engine cooling system.

Characteristics of Sub-cooled Nitrogen Cryogenic System for Applied High-Tc Superconducting Devices (고온초전도 응용기기용 과냉질소 냉각시스템의 냉각특성)

  • 강형구;김형진;배덕권;안민철;윤용수;장호명;고태국
    • Progress in Superconductivity and Cryogenics
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    • v.6 no.1
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    • pp.38-42
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    • 2004
  • The cryogenic system for 6.6 kV/200 A inductive superconducting fault current limiter (SFCL) was developed at Yonsei university in 2003. The sub-cooled nitrogen cryogenic system could be applied to not only SFCL but also many other applied high-Tc superconducting (HTS) devices like superconducting motor, superconducting generator and superconducting magnetic energy storage (SMES). Generally, the cooling capacity of GM-cryocooler depends on the load temperature. Therefore it is necessary to perform the cooling capacity test at no load condition to calculate the exact cooling power and heat load of cryogenic system. In this research, the cooling capacity test of GM-cryocooler was executed and the heat load of developed cryogenic system was calculated. The long run operation test results of sub-cooled nitrogen cryogenic system were successful in pressure and temperature condition. Moreover, the design and fabrication method of cryogenic system were introduced and the test results were described.

A compactly integrated cooling system of a combination dual 1.5-MW HTS motors for electric propulsion

  • Le, T.D.;Kim, J.H.;Hyeon, C.J.;Kim, D.K.;Yoon, Y.S.;Lee, J.;Park, Y.G.;Jeon, H.;Quach, H.L.;Kim, H.M.
    • Progress in Superconductivity and Cryogenics
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    • v.18 no.4
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    • pp.25-29
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    • 2016
  • The high temperature superconducting (HTS) contra-rotating propulsion (CRP) systems comprise two coaxial propellers sited on behind the other and rotate in opposite directions. They have the hydrodynamic advantage of recovering the slipstream rotational energy which would otherwise be lost to a conventional single-screw system. However, the cooling systems used for HTS CRP system need a high cooling power enough to maintain a low temperature of 2G HTS material operating at liquid neon (LNe) temperature (24.5 - 27 K). In this paper, a single thermo-syphon cooling approach using a Gifford-McMahon (G-M) cryo-cooler is presented. First, an optimal thermal design of a 1.5 MW HTS motor was conducted varying to different types of commercial 2G HTS tapes. Then, a mono-cryogenic cooling system for an integration of two 1.5 MW HTS motors will be designed and analyzed. Finally, the 3D finite element analysis (FEA) simulation of thermal characteristics was also performed.

Development of a 100 hp HTS Synchronous Motor (100마력 고온초전도 동기전동기 개발)

  • Sohn Myung-Hwan;Baik Seung-Kyu;Lee Eon-Young;Kwon Young-Kil;Jo Young-Sik;Kim Jong-Moo;Moon Tae-Sun;Kim Yeong-Chun;Kwon Woon-Sik;Park Heui-Joo
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.54 no.2
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    • pp.94-100
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    • 2005
  • Korea Electrotechnology Research Institute(KERI) has successfully developed a 100hp-1800rpm-class high temperature superconducting(HTS) motor with high efficiency under partnership with Doosan Heavy Industries & Construction Co. Ltd. This motor has a HTS field winding and an air-cooled stator. The advantages of HTS motor can be represented by a reduction of 50% in both losses and size compared to conventional motors of the same rating. The cooling system is based on the heat transfer mechanism of the thermosyphon by using GM cryocooler as cooling source. The cold head is in contact with the condenser of a Ne-filled thermosyphon. Independently, the rotor assembly was tested at the stationary state and combined with stator. The HTS field winding could be cooled into below 30K. Test of open-circuit characteristics(OCC) and short-circuit characteristics(SCC) and load test with resistive load bank were conducted in generator mode. Also, load tests in motor mode driven by inverter were finished at KERI. Maximum operating current of field winding at 30K was 120A. From OCC and SCC test results synchronous inductance and synchronous reactance were 2.4mH, 0.49pu, respectively. Efficiency of this HTS machine was 93.3% in full load(100hp) test. This paper will present design, construction. and experimental test results of the 100hp HTS machine.

A Study on the Development of the Console with LCD Panel for Exterior Advertizing (LCD 패널을 탑재한 옥외 광고용 콘솔 개발에 관한 연구)

  • Choi, Kab-Yong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.1
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    • pp.13-20
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    • 2010
  • The development of the console for exterior advertizing LCD Panel(LCD Console) is the purpose of this study with regard to importance of display industry. In this study, the most important point is to develop the cooling system for LCD Console. It is developed by using systematic application techniques and statistical tests and analysis to integrate commercial components, cooling fan, heat sink, thermo electronic modules etc, of it. This study, at first, shows design/manufacturing process of the cooling system and the setting process of control factors to control through experimentation. Next, after constructing the complete console, 46 inch LCD Panel and the cooling system are built in, the performance test of it is shown through experimentation.

A Study on the Structural Design of Linear Motor System (리니어모터 시스템 구조설계에 관한 연구)

  • Eun I.E.;Lee C.M.;Hwang Y.K.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.10a
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    • pp.1059-1063
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    • 2005
  • Development of a feed drive-system with high speed, positioning accuracy and thrust has been an important issue in modern automation systems and machine tools. Linear motors can be used as an efficient system to achieve such technical demands. By eliminating mechanical transmission mechanisms such as ball screw or rack-pinion, much higher speeds and greater acceleration can be achieved without backlash or excessive friction. However, due to great power loss and magnetic attraction of the linear motors heating and deflection problems occur. Therefore, it is necessary to design strong structure, cooling device with high efficiency and light weight construction in designing stage of linear motors. This paper presents an investigation into a structural design of linear motor system. In this research, a new concept of moving table with high stiffness and of cooling plate is also introduced. Structure analyses are performed by using a commercial code ANSYS in order to evaluate the design safety.

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A Study on Performance of Linear Motor for Machine Tools (공작기계용 리니어모터의 운동성능 평가에 관한 연구)

  • 최헌종;강은구;정일용;이석우
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.04a
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    • pp.215-220
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    • 2002
  • Recently, linear motor has been developed for linear motion of machine tools. Linear motor is useful to design the linear motion, high speed and high accuracy, because of the simple system not required the additional mechanical part such as coupling and ballscrew. This paper tested performance of linear motor relevant to motioning and positioning table such as F.R.F., step response and positional accuracy Linear motion system using linear motor requires the effective cooling system because it cause to decrease the positional error and to protect the motor coil. Therefore the positional error measurement was made to evaluate the effect of the temperature variation.

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Vehicle Fuel Economy Improvement by Studies on the Engine Cooling and Ancilliaries System of the Heavy Duty Engine (차량 연비 향상을 위한 대형 디젤엔진 차량의 엔진 냉각 및 부대장치 연구)

  • Lyu, Myung-Seok
    • Transactions of the Korean Society of Automotive Engineers
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    • v.15 no.3
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    • pp.79-84
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    • 2007
  • Recently it is strongly required to develop the better fuel economy as well as basic power performance based on strict emission legislation. This paper focuses on studies of the engine cooling and ancillaries system among fuel economy factors in the developing stage. Firstly through the analysis of the current specifications, it is assessed whether each components may be designed properly, not overdesigned. Secondly, it is predicted how the fuel economy of each components can be improved. Finally the results are confirmed by vehicle field test equppted with the updatedcomponents. This study found good agreementbetween the prediction and the field test on the vehicle fuel economy improvements of the heavy duty engine vehicle with updated components such as engine cooling and ancilliaries.