ZPW2000A轨道电路铁路信号基础设备维护87课件

ZPW-2000A轨道电路天津铁道职业技术学院铁路信号基础设备维护课程ZPW-2000AtrackcircuitTianjinRailwayvocationalandtechnicalcollegeMaintenanceofbasicrailwaysignalequipment匹配变压器1.作用

2.各元件功能3.端子使用Matchingtransoformer1.function2.functionofeachcomponent3.useofterminals1.问题产生

钢轨侧和电缆侧阻抗差异太大，信号传输无法得到最佳传输效果。2.解决办法:阻抗匹配3.实现器件：匹配变压器1.questiontheimpedanceofthecablesideandtherailsideislarge,itaffectsthetransmissionefficiency.2.problemsettled:impedancematching3.deviceachieved.matchingtransformertotracksideTocableside2.各元件功能（1）变压器:阻抗匹配考虑到1.0

Ω·km道碴电阻，并兼顾低道碴电阻道床，变压器变比为9:1（2）电容：隔直及交连，保证设备在直流电力牵引区段运用中，不致因直流成分造成匹配变压器磁路饱和。容量:16V，4700μF电解电容C1、C2变压器电容电容电感防雷元件连接端子2.Functionofeachcomponent（1）transformer

:impedancematchingConsidering1.0Ω·kmballastresistanceandroadbedwithlowballastresistance,theratioofoptimalvalueoftransformerT1is9:1.（2）capacitor：areusedtoisolateDCcurrentandpassACcurrent,toensurethattheequipmentinDCtractionsectionwillnotcausematchingtransformermagneticsaturationbyDCcomponentsTwoelectrolyticcapacitorsC1,C2withavolumeof16V,4700μFtransformercapacitorcapacitorinductanceLightningproofelementconnector2.各元件功能（3）

电感：10mH的电感L1用作SPT电缆表现

出容性的补偿。（4）防雷元件：雷电横向防护transformercapacitorcapacitorinductanceLightningproofelementconnector2.Functionofeachcomponent（3)inductance:withavolumeof10mH,usedtocompensatethecapacitanceofSPTcableandimprovethetransmissioneffect（4)lightningproofunit,horizontallightningprotectionofmatchingtransformer.

transformercapacitorcapacitorinductanceLightningproofelementconnectorV1V2经调谐单元端子接至轨道调谐单元匹配变压器至室内至钢轨V1V2E1E2钢包铜引接线钢包铜引接线SPT电缆SPT电缆3.端子使用E1E2经SPT电缆接至室内V1V2isconnectedtotrackthroughBAterminals3.terminalusageE1E2isconnectedtoindoorthroughSPTcabletotracksideTocableside4.结构：匹配变压器的盒体采用不饱和聚酯材料，盒盖上带有滑槽。匹配变压器型号ZPW.BP1，外形尺寸355mm×270mm×86mm，与调谐单元背靠背安装在轨道边的基础桩上。调谐单元匹配变压器4.structure：Theboxbodyofmatchingtransformerismadeofunsaturatedpolyestermaterialwithchuteonthecover.TypeofmatchingtransformerisZPW·BP1,physicaldimensionis355mm×270mm×86mm,Thematchingtransformerisinstalledonthefoundationpileonthetracksideandisinstalledbacktobackwiththetuningunit.TuningunitMatchingtransformer思考题：匹配变压器E1，E2侧电压是多少?V1V2侧电压是多少？

小结作用工作原理端子使用Question：MeasurethevoltageofE1,E2andV1V