EFD培训 第10讲 电子散热基础.pptVIP

* As an episode: Flotherm was reading a pair of 50 KB IDF Files in 10 seconds, while EFD took 45 minutes and was creating a 26 MB Solid Works Assembly. EFD.lab has no ways to filter small and unnecessary components. www.CircuitW is providing a more elaborate exchange tool, however in the SolidWorks framework. IDF import in EFD.pro and EFD.V5 may depend on the installed extension modules of ProEngineer and Catia V5. The Board and Panel Files contains the following sections: ? Header for information on the Board or Panel File itself ? Board outline for defining the outline, cutouts, and thickness of the board, panel ? Other outline for defining the outline, cutouts, and thickness of another outline ? Route outline for defining an area to route electrical connections within ? Place outline for defining an area to place electrical components within ? Route keepout for defining an area within which routing is not allowed ? Via keepout for defining an area within which vias are not allowed ? Place keepout for defining an area within which electrical components are not allowed ? Place region for defining an area to place similar electrical components within ? Drilled holes for defining drilled holes in the board, panel ? Placement for defining the locations of components on the board, or boards and components on the panel The Library File contains the following sections: ? Header for information on the Library File itself ? Electrical for defining an electrical component ? Mechanical for defining a mechanical component * * 使用 EL 模块需要购买相应的 license。 印制电路板 (PCBs) 被认为是一种具有各向异性热导率的特殊固体材料。PCB 板的整体特性（密度、比热、热导率）基于PCB的结构进行计算。为了定义 PCB 板，你首先需要在 Engineering Database 中定义 PCB 板中导体和绝缘材料的密度、比热和热导率，之后以提供的类型描述其内部结构。 层定义 （Layer Definition）类型表明你必须定义层的热导率以及每一层的厚度和范围。 导体体积含量 （Conductor Volume Fraction）需要定义PCB板中导体材料的体积含量。 板子质量 （Board Mass ）类型 ，需要定义 PCB 总的质量和总的体积，以用于其内部导体材料的计算。 之后你可以对 PCB 板应用 Printed Circuit Board 特性。 描述 PCB 的物体应该是一个具有两个平行表面的薄板 (板子某个方向的尺寸要远小于另外两个尺寸)，并且可以任意方向的倾斜