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This paper describes a comparative study between two kinds of high pressure sensors with rectangular diaphragm structure. In order to prove results of the study, the stress distributions of the rectangular membrane structure sensors were presented in this article. The stress distribution of the piezoresistance on the membrane was analyzed by the Finite Element Method (FEM) utilizing the ANSYS software...
The stress of Cu interconnects embedded in advanced ultra-low-k (ULK) dielectrics was studied for different porosities. Interconnects formed a high porosity material result in a lower stress due to relaxation in the plane. This effect is less significant for narrow lines, where in-plane relaxation is reduced by the dense narrow spacing. The stress in isolated lines was found to be independent of dielectric...
This paper gives the design and simulation of a permanent magnet synchronous motor (PMSM) for a super-high speed centrifugal compressor drive application. The PMSM has an output power of 2000 W at 200,000 rpm with 28 V dc power supply. It is designed for operation at a cryogenic temperature of 77 K. The designed PMSM is a 2-pole, 3-phase slotless structure. The permanent magnet is centrally located...
This paper gives the analysis and test of a surface mounted axial flux permanent magnet synchronous motor (PMSM) for a high-speed centrifugal compressor drive. Both analytical analysis and 3-D electromagnetic finite element method (FEM) are used to calculate flux density in the airgap, rotor back iron, and stator iron. 3-D FEM is used to simulate the electromotive force (back EMF) and torque. The...
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