英语翻译TransformerTypes and construction of TransformerA Transf

英语翻译
Transformer
Types and construction of Transformer
A Transformer is a device that changes ac energy at one voltage level into ac electric energy at another voltage level through the action of a magnetic field .It consists of two or more coils of wire wrapped around a common ferromagnetic core .These coils are (usually) not directely connected .The only connection between the coils is the common magnetic flux present winthin the core.
One of the transformer windings is connected to a source of ac electric power ,and the second (and perhaps third) transformer winging supplies electric power to loads .The transformer winding connected to the power source is called the primary winding or input winding ,and the winging connected to the loads is called the secondary winding or output winding.If there is a third winding on the transformer ,it is called the tertiary winding.
Power transformers are constructed on one of two types of cores.One type of construction consists of a simple rectangular laminated piece of steel with the transformer windings wrapped around two sides of the rectangle.This type of construction is known as core form.The other type consists of a three-legged laminated core with the windings wrapped around the center leg .This type of construction is known as shell form.In eithercase,the core is constructed of thin laminations electrically isolated from each other in order to reduce eddy currents to a minimum.

变压器
类型及变压器建造
一个变压器是一种通过通过磁场作用将一种交流电压的交流电能的能量转变成另一个电压水平的能量的装置.它由两个或两个以上的周围包裹着一个共同的铁磁核心的导线线圈组成.这些线圈（通常）不直接连接.线圈之间的唯一连接是目前常见的在中心形成的磁通量.
变压器的绕组之一,是连接到交流电源,第二个（也许第三个）是给用电器提供电源.连接到电源的变压器绕组被称为主绕组或输入绕组,连接到负载的称为二次绕组和输出绕组.如果有第三个变压器绕组,则被其称为第三绕组.
电力变压器的建造主要有两种类型.类型一,包括一个简单的矩形夹层的钢件,它的周围的两个矩形包裹有变压器绕组,这种结构被称为核心形式.另一类是有三个腿的层压的核心,其中中心绕组包裹有绕组,这种结构被称为壳形式.不管是那种方式,其核心是由相互电绝缘的薄叠片构成,以便将涡流减少到最低限度.