Free-Piston Stirling Component Test Power Converter Test Results and Potential Stirling Applications

1992 ◽  
Author(s):  
G. R. Dochat
Keyword(s):  
Power Converter ◽  
Test Results ◽  
Free Piston ◽  
Test Power ◽  
Component Test

Test Results of Sintered Nanosilver Paste Die Attach for High-Temperature Applications

2016 ◽  
Vol 13 (1) ◽  
pp. 6-16 ◽  
Author(s):  
Paul Croteau ◽  
Sayan Seal ◽  
Ryan Witherell ◽  
Michael Glover ◽  
Shashank Krishnamurthy ◽  
...  
Keyword(s):  
High Temperature ◽  
Cooling System ◽  
Wide Band ◽  
Power Converter ◽  
Test Results ◽  
Wide Band Gap ◽  
Strain Behavior ◽  
Die Attach ◽  
Nanosilver Paste ◽  
Sintered Silver

The emergence of wide band gap devices has pushed the boundaries of power converter operations and high power density applications. It is desirable to operate a power inverter at high switching frequencies to reduce passive filter weight and at high temperature to reduce the cooling system requirement. Therefore, materials and components that are reliable at temperatures ranging from −55°C to 200°C, or higher, are needed. Sintered silver is receiving significant attention in the power electronic industry. The porous nature of sintered nanosilver paste with a reduced elastic modulus has the potential to provide strain relief between the die component and substrate while maintaining its relatively high melting point after sintering. The test results presented herein include tensile testing to rupture of sintered silver film to characterize stress-strain behavior, as well as die shear and thermal cyclic tests of sintered silver-bonded silicon die specimens to copper substrates to determine shear strength and reliability.

scholarly journals Prediction of fatigue limit of journal bearings considering a multi-axial stress state

2016 ◽  
Vol 68 (3) ◽  
pp. 430-438 ◽  
Author(s):  
Christopher Sous ◽  
Henrik Wünsch ◽  
Georg Jacobs ◽  
Christoph Broeckmann
Keyword(s):  
Stress State ◽  
Axial Stress ◽  
Design Guidelines ◽  
Journal Bearings ◽  
Operating Conditions ◽  
Test Results ◽  
Content Type ◽  
Operation Conditions ◽  
Component Test ◽  
Material Tests

Purpose The purpose of this paper is to investigate the applicability of the quadratic failure hypothesis (QFH) on journal bearings coated with a white metal sliding layer on the prediction of safe and unsafe operating conditions. The hypothesis covers operation conditions under static and dynamical loading. Design/methodology/approach Material tests and elastohydrodynamic, as well as structural, simulations were conducted to provide the required input data for the failure hypothesis. Component samples were tested to verify the results of the QFH. Findings The load bearing capacity of journal bearings was analysed for different operating conditions by the use of the QFH. Results allow for the identification of critical and non-critical loading conditions and are in accordance with component test results. Originality/value Today’s design guidelines for journal bearings do not consider a multi-axial stress state and actual stress distribution. The applied hypothesis enables consideration of multiaxiality inside the sliding surface layer, as well as determining the location of bearing fatigue due to material overload.

Component Mode Synthesis Using Component Test Results

2002 ◽  
Vol 2002.1 (0) ◽  
pp. 297-298
Author(s):  
Kenichi FUNAMOTO ◽  
Masayoshi MISAWA
Keyword(s):  
Component Mode Synthesis ◽  
Test Results ◽  
Component Test

SEE and TID Test Results of Candidate Electronics for LHC Power Converter Control

2013 ◽  
Author(s):  
Slawosz Uznanski ◽  
Benjamin Todd ◽  
Arend Dinius ◽  
Quentin King ◽  
Karol Motala ◽  
...  
Keyword(s):  
Power Converter ◽  
Test Results

Development of an Aeroderivative Gas Turbine Dry Low Emissions Combustion System

1994 ◽  
Vol 116 (3) ◽  
pp. 542-546 ◽  
Author(s):  
G. Leonard ◽  
J. Stegmaier
Keyword(s):  
Gas Turbine ◽  
Aircraft Engine ◽  
System Component ◽  
Test Results ◽  
Combustion System ◽  
Fuel Delivery ◽  
Component Test ◽  
Engine Combustion ◽  
Annular Combustor ◽  
New System

This paper gives the development status of GE’s new aeroderivative premixed combustion system. This system consists of a new fuel staged annular combustor, compressor rear frame, first-stage turbine nozzle, electronic staging controller, and fuel delivery system. Component test results along with a description of the combustion system are presented. This new system will reduce NOx emissions by 90 percent relative to the original aircraft engine combustion system while maintaining low emissions of CO and UHCs. Tests of a LM6000 gas turbine equipped with the new system are planned for early 1994.

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