Papers by Keyword: Area Reduction

Abstract: This work proposes SiC half-bridge modules to improve the high-power motor drive systems in space. The high current capability of the modules allows to reduce the number of required components, reducing the required PCB area. Using analytical loss calculation models the losses and the efficiency of the Si and SiC configurations is calculated, obtaining better results with the SiC due to the lower conduction losses, even if the voltage rating of the devices is severely derated to avoid single event burnouts in the space application.

Abstract: With the development of cross-wedge rolling (CWR) process in recent years, the processing boundary of parts by means of CWR has witnessed a great breakthrough, especially in the field of area reduction. Based on abundant experiment, the latest processing boundary is constructed. It is affected by rotation condition and products’ defects, such as necking, tensile failure and internal rarefaction. The relationship between basic process parameters and these defects have been presented in this paper, including reasons behind these phenomena.

Abstract: Equal Channel Angular Extrusion is a widely adopted severe plastic deformation process capable of imparting large amounts of strain in a material via multiple passes through the die. In order to facilitate reinsertion of worked bars for multipass processing, reshaping is often required. Although this topic is rarely discussed in the literature, it is a significant step that can influence processing efficiency. This paper presents several reshaping options and makes recommendations for method selection based on the authors’ experiences with each.