ABBNTAI06◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆【厦门莫格电气自动化有限公司】【XiamenMoggetElectricAutomationCo.,Ltd】【当天顺丰发货，欢迎***验货，不要犹豫，不要徘徊，错失良机，后悔晚矣】【来电咨询：雷(女士）】【销售***请点上面↑↑↑↑↑↑↑↑↑↑】【传真：0592-6514751（请备注：雷琳收）】【邮箱：1982497648@***.com】公司主营AB、本特利、黑马、施耐德、GE、ABB【DSQC系列】ICS英维思西门子yokogawa横河霍尼韦尔福克斯波Rosemount（罗斯蒙特）德国EPRO（飞利浦）ENTEK（恩泰克）VIBRO-METER（韦伯）Yaskawa（安川）Motorola（摩托罗拉）BoschRexroth（博世力士乐）Woodward（伍德沃德）等品牌◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆◆全新原装现货：NTAI06NTAI06NTAI06使用位D／A转换器。采用位串行D／A转换器MAX531。D／A转换器输出的电压信号加到放大器F5的同相端，F5的输出接到中功率三极管D66A的基极，D66A与大功率三极管2N3055组成达林顿形式。RL为负载，它接在+40V电源和达林顿之间，与之并联的二极管是考虑到负载有可能是电感而加上的，作用是断电时消耗电感负载的能量，保护系统。R为取样电阻，阻值0．33Ω，功率10W，取样电阻把电流线性转化成电压信号，经同相放大器后加到放大器F5的反向端。设负载上的电流为I，反馈回路中同相放大器增益为K，输入信号电压值为U，则U=0．33xIxK，调节同相放大器的增益，使0．33xK=1，可使U=I，这样实现了电压转换电流功能，且消除了三极管β值随温度变化带来的影响。D／A转换的电路如图3所示。1．4V／I转换部分V／I转换电路采用高精度集成运放OP07作为比较放大器，DA的输出电压经跟随器与比较器的同向端相连，比较器的反向端与采样电阻的相连，使电流预设值与测量值直接进行比较，&plu***n;V电源为OP07提供电源电压，运放的输出电压信号控制达林顿复合三极管的导通，经模拟闭环反馈调整使电流达到设定值，TIP41(10A)是大功率PNP三极管，在本设计中的主要功能是实现功率放大。采样电阻将电流信号以电压的形式加到运放的输入端，由此构成的电流并联负反馈电路，可以减轻后级电路对D／A的干扰，从而得到恒流输出，大大提高了电流源的稳定性。根据运算放大器的结构可知，负载电流仅与输入电压和采样电阻的阻值有关，而与负载电阻的大小无关。当输入电压保持不变时，负载电阻在一定范围内变化，而输出电流将保持不变，由此构成恒流源电路。本设计方案的一个主要特点是，采用康铜丝做采样电阻，康铜丝的温度系数约为5ppm／℃，当有电流流过电阻是引起的温度升高对其阻值影响不会太大，其温度特性较好。电路中各电阻均应选用精密电阻，以达到能高的V／I转换精度。V／I转换部分电路图如图4所示。IS200***EH1AIS200***GAG1AIS200***IFH1AIS200***SCG1AIS200BAIAH1BIS200BICLH1B____________------IS200BICMH1AIS200BICRH1AIS200BLIGH1AIS200BPIAG1AIS200BPIBG1AIS200BPIHH1AIS200BPIRG1AIS200BPPBH2BIS200BPPH2BIS200BPVCG1BR1IS200CABPG1BIS200CPFPG1AIS200CPFXG1AIS200CVMBG1AIS200DAMAG1BIS200DAMBG1AIS200DAMCG1AIS200DAMDG1AIS200DAMDG2AIS200DAMEG1AIS200DSCBH1AIS200DSFCG1AIS200DSPXH1DIS200DSPXH2CIS200DTAIH1AIS200DTCIH1AIS200EACFG1AIS200ECTBG2AIS200EDCFG1AIS200EGDMH1AIS200EGPAG1AIS200EHPAG1AIS200EISBH1AIS200EMIOH1AIS200EPBPG1AIS200EP***G1AIS200EP***G2AIS200ERBPG1AIS200ERDDH1AIS200ERIOH1AIS200EROCH1AIS200EROCHIAIS200ERRBG1AIS200ERRRH1AIS200ERSCG2AIS200ESELH1AIS200EXAMG1BIS200EXCSG1AIS200EXHSG1AIS200EXHSG3AIS200EXIBG1AIS200FOSAG1AIS200FOSBH1AIS200GGXIG1AIS200HFPAG1AIS200HFPAG2AIS200HFPRG1AIS200IGDMH1BIS200IGEHG1AIS200IGPAG1AIS200IGPAG2AIS200ISBAH1AIS200ISBBG1AIS200ISBBG2AIS200ISBDG1AIS200ISBEH1AIS200ISBEH2AIS200IVFBG1AIS200JGNDG1AIS200JPDCG1AIS200JPDDG1AIS200JPDLG1AIS200JPDMG1AIS200JPDPG1AIS200JPDSG1AIS200PICHG1AIS200PSCDG1AIS200RAPAG1A*******************************************************IS200RAPAG1BIS200RCSAG1AIS200RCSBG1BIS200SCNVG1AIS200SCTLG1AIS200SPROH1AIS200SRLYH2AIS200SRTDH2AIS200***AH1AIS200STAIH2AIS200STTCH2AIS200TBAIH1AIS200TBAIH1BIS200TBAIH1CIS200TBAIH2CIS200TBAOH1AIS200TBAOH1BIS200TBAOH1CIS200TBCHIH2BIS200TBCIH1AIS200TBCIH1BIS200TBCIH2BIS200TBCIH2CIS200TBTCH1BIS200TBTCH1CIS200TCATH1AIS200TDBSH6AIS200TDBTH6AIS200TFBAH1AIS200TGENH1AIS200TPIMG1AIS200TPROH1BIS200TREGH1AIS200TREGH1BIS200TREGH2BIS200TRESH1AIS200TRLYH1BIS200TRLYH1CIS200TRLYH1DIS200TRLYH1FIS200TRLYH2CIS200TRLYH3EIS200TRLYHIBIS200TRPGH1AIS200TRPGH1BIS200TRPGH2BIS200TRPGH3BIS200TRPSH1AIS200TRTDH1BIS200TRTDH1CIS200TRTDH1DIS200TSVOH1BIS200TTPWG1BIS200TTPWH1AIS200TTURH1BIS200TVIBH2BIS200UCVEH2AEIS200VAICH1BIS200VAICH1CIS200VAICH1DIS200VAOCH1BIS200VAOCH1CIS200VATFG1AIS200VCCCH1BIS200VCM1H2BIS200VCMIH1BIS200VCMIH2BIS200VCRCH1BIS200VGENH1BIS200VPROH1BIS200VPROH2BIS200VPWRH1AIS200VRTDH1CIS200VRTDH1DIS200VSCAH2AIS200VSVOH1BIS200VTCCH1CIS200VTURG1BIS200VTURH1BIS200VTURH2BIS200VVIBH1BIS200VVIBH1CIS2020LVPSG3AIS2020RKPSG1AIS2020RKPSG2AIS2020RKPSG3AIS210BPPBH2BIS210DTAIH1AAIS215***AH1AIS215***EH1AIS215UCCAM03AIS215UCVDH1AIS215UCVDH2AIS215UCVDH2AAIS215UCVDH2AKIS215UCVDH2AM)