Press-pack insulated gate bipolar transistors (PP-IGBTs) are commonly connected in series and stacked together with heatsinks using an exterior clamping fixture order to achieve high-voltage dc-link levels. A suitable contact area between the device is essential ensuring optimal PP-IGBT thermomechanical performance, especially for first last devices a stack. In this study, effects of on collect...

In a power module the parasitic inductance limits dynamic high-frequency performance, and area of cooling surfaces capability. This article presents new 3-D electronic design methodology based on concept mutual cancellation multisided heat transfer. New prismatic packaging concepts are proposed for wide band gap devices, where devices can be mounted at acute angles to adjacent interconnects or ...

High power diode lasers have found increased applications in pumping of solid state or fiber laser systems for industrial, military and medical applications as well as direct material processing applications. The non-linearity of the near-field of emitters (or the so called “smile” effect) in a laser diode array poses significant challenges in optical coupling and beam shaping and has become on...

In this study, a new Broadband Double Ring Hole Element (BDHE) meta-surface absorber is studied to suppress EMI from PCB heatsink for 1-12 GHz covering L, S, C, and X bands. The proposed metamaterial-structure consists of resistances 8 ring resonators, four which are inner outer that configured provide an absorbing effect. For broadband, numerical simulations show average 65% absorption value o...

The phase change heat transfer of nano-enhanced materials (NePCMs) was addressed in a heatsink filled with copper metal foam fins. NePCM made 1-Tetradecanol graphite nanoplatelets. an annulus contained where its outer surface subject to convective cooling external flow while inner exposed constant flux. governing equations, including the momentum and change, were explained partial differential ...

Light Emitting Diode (LED) is a new kind of light source that quickly being used into automotive lighting systems. In recent years, there have been increased expectations placed on vehicle headlamps, including they not only be fully functional, affordable, and long-lasting, but also stylish, energy-efficient, environmentally friendly. Since LED sources are highly efficient, small in size, etc.,...

PIG (Pin-Injection-Gate) die-casting and hot stamping was developed for fabrication of small-sized thin-walled aluminum alloy parts from the recycled feedstock. The pure granules were utilized as a feedstock model materials. measured mass with estimated weight 3D-CAD (Computer Aided Design) products poured into PIG-nozzles before injection. After quickly melting by induction heating inside PIG-...

Estimation of accurate IGBT junction temperature is crucial for reliability assessment. The well-known RC lumped approach can help predict temperature. However, this method suffers from inaccuracy while characterizing the thermal behaviour several modules mounted to liquid-cooled heatsink. Specifically, challenge originates cross-coupling and module-to-module heat spreading converter cooling co...

The present study utilized piezoelectric ceramics (PC) as actuators to design five new heatsinks and preliminarily investigated the different types their operating conditions, such frequency, placement distance, thickness between sheets, sheet size, noise produced. results showed that when micro heatsink bearingless piezo jet was placed too close heat source, high temperature sucked back surrou...