新款6ES7655-5DX40-2AA0模块可议价
新款6ES7655-5DX40-2AA0模块可议价
新款6ES7655-5DX40-2AA0模块可议价
新款6ES7655-5DX40-2AA0模块可议价
新款6ES7655-5DX40-2AA0模块可议价
新款6ES7655-5DX40-2AA0模块可议价
6ES7655-5DX40-2AA0功能模块独立的概念是功能模块化、抽象、信息隐蔽和局部化概念的直接结果。
6ES7655-5DX40-2AA0抽象是指对事物、状态或过程之间所存在的某些相似的方面集中和概括起来,而暂时忽略他们之间的差异,即考虑抽象事物的本质特征而暂时不考虑他们的细节。
6ES7655-5DX40-2AA0信息隐蔽是指再设计功能模块时使得一个功能模块内所包含的信息(过程或数据),对于不需要这些信息的功能模块来说是不能访问的。信息隐蔽原则对于以后在软件维护期间修改软件时会带来极·的好处,因为大量数据和过程是软件的其他部分所不能觉察的,因而再对某个功能模块修改时就不大会影响到软件的其他部分,所谓局部化是指把一些关系密切的软件元素在物理位置上彼此靠近。
6ES7655-5DX40-2AA0功能模块独立性是通过制定具有单一功能并且和其他功能模块没有过多联系的功能模块来实现的。每个功能模块只涉及该软件要求的一个具体子功能,而且与软件结构的其他部分的接口是简单的。
6ES7655-5DX40-2AA0功能模块独立性好的软件接口简单,易于编制,独立的功能模块也比较容易测试和维护,限制了功能模块之间由于联系紧密而引起的修改副作用。独立性是保证软件质量的重要因素。
6ES7655-5DX40-2AA0 The concept of functional module independence is a direct result of the concepts of functional modularity, abstraction, information hiding and localization.
6ES7655-5DX40-2AA0 Abstraction refers to concentrating and summarizing some similar aspects that exist between things, states or processes, while temporarily ignoring the differences between them, that is, considering the essential characteristics of abstract things without temporarily considering their details. 6ES7655-5DX40-2AA0 Information concealment refers to redesigning functional modules so that the information (process or data) contained in a functional module cannot be accessed by functional modules that do not need this information. The principle of information concealment will bring great benefits to future modifications to the software during software maintenance, because a large amount of data and processes cannot be detected by other parts of the software, so modifications to a certain functional module will not affect the software. For other parts, the so-called localization refers to placing some closely related software elements close to each other in physical locations.
6ES7655-5DX40-2AA0 Functional module independence is achieved by formulating functional modules that have a single function and do not have too many connections with other functional modules. Each functional module only involves a specific sub-function required by the software, and the interface with other parts of the software structure is simple.
6ES7655-5DX40-2AA0 Software with good functional module independence has simple interfaces and is easy to compile. Independent functional modules are also easier to test and maintain, which limits the side effects of modifications caused by the close connection between functional modules. Independence is an important factor in ensuring software quality.
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一般来说,这类模块称为负载 (POL) 电源供应系统或使用点电源供应系统 (PUPS)。由于模块式结构的优点甚多,因此模块电源广泛用于交换设备、接入设备、移动通讯、微波通讯以及光传输、路由器等通信领域和汽车电子、航空航天等。
尤其近几年由于数据业务的飞速发展和分布式供电系统的不断推广,模块电源的增幅已经超出了一次电源。模块电源具有隔离作用,抗干扰能力强,自带保护功能,便于集成。随着半导体工艺、封装技术和高频软开关的大量使用,模块电源功率密度越来越大,转换效率越来越高,应用也越来越简单。
电源模块
人们在开关电源技术领域是边开发相关的电力电子器件,边开发开关变频技术,两者相互*进推动着开关电源每年以超过两位数字的增长率向着轻、小、薄、低噪声、高可靠、抗干扰的方向发展。开关电源可分为AC/DC和DC/DC两大类,DC/DC变换器现已实现模块化,且设计技术及生产工艺在国内外均已成熟和标准化,并已得到用户的认可,但AC/DC的模块化,因其自身的特性使得在模块化的进程中,遇到较为复杂的技术和工艺制造问题