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Investigation of a power module with double sided cooling using a new concept for chip embedding

机译:使用芯片嵌入的新概念研究带有双面冷却的电源模块

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Embedded components technology has launched its implementation in volume products demanding for highest miniaturization level. Small modules with embedded dies and passive components on the top side are mounted in handheld devices. Smart phones have been the enablers for this new technology using the capabilities of embedded components. With this technological background another business field became interesting for embedded components - the embedded power electronics. These applications ask for quite different requirements compared to the embedded technology of the first generation. The roadmaps for power application development show an ongoing decrease of volume and weight for power modules driven by the requirements for automotive industry. The European project EmPower has been labeled from CATRENE (Cluster for Application and Technology Research in Europe on NanoElectronics) organization and launched in 2013 as a development project for new power packages and power modules using die embedding technology. For the realization of this technology copper termination on MOSFETs, IGBTs and power diodes is necessary. Equipment and processes have been developed in the supply chain of EmPower to support the development of power modules ranging from 500 W to 50 kW. For enhanced thermal performance of power modules a concept for double sided cooling has been developed. Besides full area contacting the MOSFET on drain side with copper and contacting the embedded components in a power core with an isolated metal substrate with silver sinter paste a very effective concept for reducing thermal resistances and inductance will be shown on the example of a 500W demonstrator. With the realization of this demonstrator the power embedding concept can be proved. This paper will focus on the behavior of the power module for operational conditions of a Pedelec application. Basic reliability aspects will be shown as well as the electrical characterization - switching behavior, power losses and power cycling. Furthermore the thermal properties of the 500 W demonstrator module as predicted by results from thermal simulations will be experimentally verified. Finally an outlook will be given for possible automotive products based on this demonstrator.
机译:嵌入式组件技术已在要求最高微型化水平的批量产品中开始实施。顶部带有嵌入式管芯和无源组件的小型模块安装在手持设备中。使用嵌入式组件的功能,智能手机已经成为了这项新技术的推动者。在这种技术背景下,嵌入式组件的另一个业务领域-嵌入式电力电子变得很有趣。与第一代嵌入式技术相比,这些应用程序要求完全不同的要求。电源应用开发路线图显示,受汽车行业需求的驱动,电源模块的体积和重量正在不断减少。欧洲项目EmPower已被CATRENE(纳米电子在欧洲的应用和技术研究集群)组织标记,并于2013年启动,作为使用裸片嵌入技术的新型功率封装和功率模块的开发项目。为了实现该技术,需要在MOSFET,IGBT和功率二极管上使用铜端接。 EmPower的供应链中已经开发了设备和工艺,以支持500 W至50 kW功率模块的开发。为了增强功率模块的热性能,已经开发了双面冷却的概念。除了将漏极侧的MOSFET与铜进行全面积接触,并将功率芯中的嵌入式组件与含银烧结膏的隔离金属基板与功率核心接触之外,在500W演示器的示例中还将展示一种非常有效的降低热阻和电感的方案。通过该演示器的实现,可以证明功率嵌入的概念。本文将重点介绍Pedelec应用程序在运行条件下电源模块的行为。将显示基本的可靠性方面以及电气特性-开关性能,功率损耗和功率循环。此外,将通过实验验证由热模拟结果预测的500 W演示器模块的热性能。最后,将基于该演示器对可能的汽车产品进行展望。

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