research on thermal characteristics for high speed

Using thinner laminations to reduce operating temperature in a high speed hand-held surgical power tool US Patent App 10(698) (2003) 114 [4] Huang Y Zhu J and Guo Y Thermal analysis of high-speed SMC motor based on thermal network and 3-D FEA with rotational core loss included Magnetics IEEE Transactions on 45(10) (2009) 4680-4683 2013-9-1Free Online Library: Research of characteristics of working cycle of high-speed diesel engine operating on biofuels RME-E and D-RME-E Part 2 Indicators and characteristics of heat release in diesel cylinder by Transport Transportation industry Automobile engines Automobiles Motors engines etc Biomass energy Diesel engines Diesel motor Diesel motor industry Internal combustion engine

High

High-speed imaging provides a powerful tool to reveal the plasma dynamics High-speed video camera with bandpass filter system was used to measure the electrode temperature as well as the arc fluctuation Electrode temperature was evaluated from the radiation intensities at 785 nm and 880 nm from the electrode thermal emission

Plate attitude control structures such as rudders and vertical tails of high-speed aircraft are faced with the compound effect of fast time-varying thermal environments and vibration during the high maneuvering flight In this paper a thermal/vibration test system was established by combining a transient aerodynamic heating simulation system with a vibration test system

Plate attitude control structures such as rudders and vertical tails of high-speed aircraft are faced with the compound effect of fast time-varying thermal environments and vibration during the high maneuvering flight In this paper a thermal/vibration test system was established by combining a transient aerodynamic heating simulation system with a vibration test system

In the present paper under thermal-irradiated operating conditions the performance characteristics of high speed laser diodes (based on Vertical Cavity Surface Emitting Laser (VCSELs)) are deeply and parametrically investigated The processed characteristics are: the harmonic response transfer function the resonance frequency 3-dB bandwidth and the rise time

2017-12-12This paper presents thermal characteristics and dynamic characteristics of High speed motorized spindle were analyzed experimentally Num erical analysis was done and results were validated with experimental results Keywords: High speed motorized spindle Dynamic –Analysis Thermal –Analysis Nomenclature

RESEARCH LABORATORY Experimental Study of the

2013-4-10U S Army Research Laboratory Glenn Research Center Cleveland Ohio C Kilmain Bell Helicopter Textron Inc Fort Worth Texas Experimental Study of the Influence of Speed and Load on Thermal Behavior of High-Speed Helical Gear Trains NASA/TM—2005-213632 July 2005 National Aeronautics and Space Administration Glenn Research Center Prepared

2013-12-26High Speed Infrared Cameras Enable Demanding Thermal Imaging Applications Introduction Contents: Introduction 1 Infrared Spectral Sensitivity Bands 2 Image Resolution and Field-of-View 2 1 Detector arrays and pixel sizes 2 2 Infrared lens characteristics 3 High Speed Camera Features 3 1 Short exposure times

This paper describes the operating characteristics of NPN 4H-SiC (a polytype of silicon carbide) bipolar junction transistor (BJT) and 4H-SiC Darlington Pairs A large amount of experimental data was collected The wafer BJTs were able to block over the rated 600 V in the common-emitter configuration and the TO-220 BJTs were able to block over the 1200 V rated voltage

In order to meet the demand of thermal design of modern machine tools thermal model and thermal characteristics of high-speed spindle system in numerical control (NC) precision lathe were studied in detail using finite element method (FEM) The results show

A motorized high speed spindle has very complicated dynamics consisting of non-stationary and speed-related thermal characteristics Many studies have reported different designs to control or monitor thermal spindle growth with limited results whereas the application of high speed machining (HSM) demands ldquozero tolerancerdquo no matter the range of speed or material to be machined

Thermal and high speed modulation characteristics are investigated for a unidirectional-emission microdisk laser with a radius of 7 μm surrounded by BCB-cladding layer with a threshold current of 1 5 mA at the temperature of 287 K The lasing spectra under different widths of pulsed current are measured to characterize the temperature rise during the pulse period and the thermal

Based on the typical start and stop conditions of aeroengine high pressure rotor the problem of flow-thermo-elastic coupling is solved in this research Applying basic theory and control equation it is analyzed the fields of transient temperature thermal stress and thermal deformation in the start and stop process Then the temperature at last stopping moment is selected as the boundary

2018-8-22to the high-torque/low-speed rotor with reduction ratios in the range of 25:1 to 100:1 (refs 1 to 14) Gearing systems in these extreme duty applications can also have thermal behavior issues due to the high pitch line velocities While design considerations for gear tooth bending and contact capacities are usually considered initially high speed

Numerical investigation of heat transfer characteristics of

2020-6-6The high-speed and high-temperature air flows through the open-cycle reactor of the aircraft engine differs from typical reactors The heat transfer characteristics of high-speed air flow have great effects on the reactor performance

We report an electrically pumped 1550 nm MEMS tunable VCSEL with a continuous tuning of 101 nm at 22 #x000B0 C The top MEMS-DBR with built-in stress gradient within the dielectric layers is deposited in a low-temperature PECVD chamber on an InP-based half-VCSEL structured by surface-micromachining and electrothermally actuated for continuous wavelength tuning With 2 6 mA

Motorized spindle is one of the core parts of high-speed machine tool to a great extent its thermal characteristics determine the thermal stress and thermal deformations therefore the research on thermal characteristics is of great significance to increase the accuracy of high-speed machine tool In this paper the heat generation developed in the built-in motor and the bearings is calculated

article{osti_4098158 title = {MACHINING CHARACTERISTICS OF HIGH STRENGTH THERMAL RESISTANT MATERIALS United States Air Force Machinability Report 1960 Volume 4 Final Technical Engineering Report for December 22 1958 to December 18 1959} author = {} abstractNote = {A study of the machining characteristics in turning milling drilling and tapping was conducted on 25

Thermal Characteristics of High Speed Motorized Spindle with Helical Water Cooling Channel Buy Article: $68 00 + tax (Refund Policy) Authors: Qiang He Yong Zhang Jun Ye Qinpo Niu Xuefeng Yao Source: Recent Patents on Mechanical Engineering Volume 5 Number 1 2012

2019-8-28The results of this study reveal that the high-speed drilling of 6000–7000 r/min may effectively reduce the two parameters of maximum cortical temperature and duration of exposure at temperatures above the allowable levels which in turn reduce the probability of thermal

In order to avoid the sudden failure of high-speed spindles in the actual machining process caused by an excessive temperature rise at the design stage a three-dimensional (3D) finite element analysis (FEA) model was proposed to conduct transient thermal-structure interactive analysis of a high-speed spindle The FEA model considered thermal contact resistance (TCR) at solid joints and

2020-4-19Title: Thermal Characteristics of High Speed Motorized Spindle with Helical Water Cooling Channel VOLUME: 5 ISSUE: 1 Author(s):He Qiang Zhang Yong Ye Jun Niu Qinpo and Yao Xuefeng Affiliation:School of Mechanical Engineering Anyang Institute of Technology Anyang Henan Post Code 455000 P R China Keywords:3-D numerical FEM helical water-cooling system high-speed grinding high speed

2010-8-17Analytical and Thermal Modeling of High-Speed Machining With Chamfered Tools High-speed machining offers several advantages such as increased flexibility and pro-ductivity for discrete-part manufacturing However excessive heat generation and result-ing high temperatures on the tool and workpiece surfaces in high-speed machining leads