焊接科学与工程专业英语 教学课件 作者 吴志生 柏艳红 黎穗琼 主编第2章.ppt

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1、Chapter2ARCWeldingPowerSource弧焊电源Contents2.1ClassificationofPowerSource2.1.1ACPowerSupplies2.1.2DCpowersupplies2.1.3InverseSourceofArcWelding2.3SelectingandSpecifyingaPowerSource2.2ElectricalCharacteristicsofPowerSource2.2.1ConstantVoltage2.2.2ConstantCurrent2.2.3Combined

2、Constant-CurrentandConstant-VoltageCharacteristics2.1ClassificationofPowerSource弧焊电源的种类NEWWORDS:output输出alternating交替的constantcurrent恒定电流transformer变压器respectively分别地winding绕，缠coupling[电]耦合coil线圈；卷inductance电感impedance阻抗inserted插入的volt-ampere伏安tapped分接的shunt分流器saturable可饱和

3、的configuration配置；结构install安装elongated瘦长的inductive感应的reactorcore反应堆芯2.1ClassificationofPowerSource弧焊电源的种类sinusoid正弦曲线deionization去离子作用penetration渗透biasing偏置rectifier整流器mercury汞，水银threshold极限；临界值filter滤波器inductor电感器insulated绝缘的2.1ClassificationofPowerSource弧焊电源的种类KEYSENTENCE

4、S:2.1.1ACPowerSuppliesFigure2.1Basicelectricalelementsofaweldingtransformer.A.WeldingTransformer2.1ClassificationofPowerSource弧焊电源的种类Figure2.1showsthebasicelementsofaweldingtransformer.Foratransformer,therelationshipbetweenthewindingturnsandtheinput/outputvoltagescanbeexpr

5、essedasfollows:(2-1)Thereareseveraltransformerdesignstoprovidedesiredoutputvolt-amperecharacteristicsforanarcweldingcondition,includingtappedsecondarycoilcontrol,movable-coilcontrol,movable-shuntcontrol,movable-corereactor,saturablereactorcontrol.Thesedesignsarebrieflydesc

6、ribedasfollows.2.1ClassificationofPowerSource弧焊电源的种类transformerdesignsTappedsecondarycoilcontrolMovable-CoilControlMovable-ShuntControlMovable-CoreReactorSaturableReactorControl2.1ClassificationofPowerSource弧焊电源的种类Figure2.2Movable-corereactortypeACpowersupply.2.1Classifica

7、tionofPowerSource弧焊电源的种类Figure2.3SaturablereactortypeACpowersupply.2.1ClassificationofPowerSource弧焊电源的种类B.SquareWavePowerSupplyTheinstantaneouslyavailablecurrentmightbetoolowtoassureareliablearcignition.Thisproblemcanbesolvedbyusingapowersupplywithasquare-waveformcurrentou

8、tput(Figure2.4).2.1ClassificationofPowerSource弧焊电源的种类2.1.2DCpowersuppliesThemostcommonDCp