高(gao)(gao)频电(dian)(dian)力电(dian)(dian)子装置无论是应用于工业矿产中的(de)(de)(de)(de)电(dian)(dian)动机车(che)，在风(feng)机水泵(beng)的(de)(de)(de)(de)交(jiao)流(liu)调(diao)速(su)，还是新(xin)能源发电(dian)(dian)中的(de)(de)(de)(de)风(feng)电(dian)(dian)并(bing)网转换(huan)技(ji)术(shu)以及(ji)(ji)对多余能量(liang)的(de)(de)(de)(de)存储和(he)使用等多个方(fang)面，都需要(yao)在复杂(za)环(huan)(huan)境下对电(dian)(dian)流(liu)进(jin)行检测(ce)(ce)，因(yin)此对电(dian)(dian)流(liu)传感(gan)(gan)(gan)器(qi)(qi)的(de)(de)(de)(de)温(wen)度特性及(ji)(ji)精确度的(de)(de)(de)(de)要(yao)求较高(gao)(gao)。随着电(dian)(dian)力电(dian)(dian)子高(gao)(gao)频化的(de)(de)(de)(de)进(jin)一步发展(zhan)，可(ke)以在高(gao)(gao)温(wen)环(huan)(huan)境下测(ce)(ce)量(liang)复杂(za)电(dian)(dian)流(liu)波形的(de)(de)(de)(de)电(dian)(dian)流(liu)传感(gan)(gan)(gan)器(qi)(qi)的(de)(de)(de)(de)研(yan)制(zhi)具有(you)很大(da)(da)的(de)(de)(de)(de)价值和(he)应用潜力。目前(qian)存在的(de)(de)(de)(de)电(dian)(dian)流(liu)检测(ce)(ce)技(ji)术(shu)和(he)方(fang)法有(you)很多，根(gen)据(ju)测(ce)(ce)量(liang)方(fang)法和(he)方(fang)式的(de)(de)(de)(de)不同(tong)，电(dian)(dian)流(liu)传感(gan)(gan)(gan)器(qi)(qi)可(ke)分为非隔(ge)离(li)式与电(dian)(dian)隔(ge)离(li)式两种。非隔(ge)离(li)式主(zhu)要(yao)是指分流(liu)电(dian)(dian)阻(zu)。电(dian)(dian)隔(ge)离(li)式主(zhu)要(yao)包括 霍尔电(dian)(dian)流(liu)传感(gan)(gan)(gan)器(qi)(qi)(Hall-transducer)，罗氏线(xian)圈(quan)(Rogowski Coil)，电(dian)(dian)流(liu)互感(gan)(gan)(gan)器(qi)(qi)(Current transformer)，磁(ci)通门电(dian)(dian)流(liu)传感(gan)(gan)(gan)器(qi)(qi)(Fluxgate current sensor)以及(ji)(ji)巨磁(ci)阻(zu)电(dian)(dian)流(liu)传感(gan)(gan)(gan)器(qi)(qi)(GMR current sensor )等。功(gong)率分析仪还可(ke)以测(ce)(ce)量(liang)和(he)分析其(qi)他与功(gong)率相关的(de)(de)(de)(de)参数，例如电(dian)(dian)压和(he)电(dian)(dian)流(liu)的(de)(de)(de)(de)有(you)效(xiao)值、峰值、频率等。宁波国(guo)产替(ti)代电(dian)(dian)流(liu)传感(gan)(gan)(gan)器(qi)(qi)价格大(da)(da)全(quan)

已知交(jiao)(jiao)流(liu)(liu)(liu)工频为(wei)(wei)f=50Hz，假设(she)自(zi)(zi)激(ji)振(zhen)荡磁(ci)(ci)(ci)通(tong)门电路激(ji)磁(ci)(ci)(ci)电压(ya)频率fex>>f，且为(wei)(wei)50Hz的整数倍，即满足(zu)fex=kf(k为(wei)(wei)整数)。设(she)一次(ci)(ci)电流(liu)(liu)(liu)中交(jiao)(jiao)流(liu)(liu)(liu)分(fen)(fen)(fen)量(liang)(liang)为(wei)(wei)iac，直(zhi)流(liu)(liu)(liu)分(fen)(fen)(fen)量(liang)(liang)为(wei)(wei)Id。此时(shi)(shi)可(ke)(ke)以将(jiang)一次(ci)(ci)电流(liu)(liu)(liu)iP表示为(wei)(wei)为(wei)(wei)：iP(t)=iac(t)+Id（2－35）由于(yu)(yu)激(ji)磁(ci)(ci)(ci)电压(ya)频率远大于(yu)(yu)一次(ci)(ci)交(jiao)(jiao)流(liu)(liu)(liu)频率，因此可(ke)(ke)以将(jiang)一次(ci)(ci)交(jiao)(jiao)流(liu)(liu)(liu)在每个极短的激(ji)磁(ci)(ci)(ci)电压(ya)周期内，看作缓慢(man)变化的直(zhi)流(liu)(liu)(liu)信(xin)号。假设(she)按(an)照自(zi)(zi)激(ji)振(zhen)荡磁(ci)(ci)(ci)通(tong)门电路频率fex将(jiang)一次(ci)(ci)电流(liu)(liu)(liu)ip进(jin)行(xing)分(fen)(fen)(fen)段(duan)，共(gong)分(fen)(fen)(fen)为(wei)(wei)k段(duan)，并取每段(duan)取间(jian)(jian)的电流(liu)(liu)(liu)左端点值(zhi)作为(wei)(wei)该段(duan)区间(jian)(jian)电流(liu)(liu)(liu)值(zhi)，则在分(fen)(fen)(fen)段(duan)区间(jian)(jian)内可(ke)(ke)将(jiang)一次(ci)(ci)电流(liu)(liu)(liu)ip表示为(wei)(wei)：iP(t)=iac(t1k)+Id,t1k<t<t2k其中每段(duan)区间(jian)(jian)时(shi)(shi)间(jian)(jian)间(jian)(jian)隔Δt为(wei)(wei)自(zi)(zi)激(ji)振(zhen)荡磁(ci)(ci)(ci)通(tong)门电路周期，即满足(zu)：Δt=1/fex=t2k一t1k=t3k一t2k=...,keN*（2－36）（2－37）此时(shi)(shi)在t1k～t2k期间(jian)(jian)，可(ke)(ke)以将(jiang)一次(ci)(ci)电流(liu)(liu)(liu)看作近似直(zhi)流(liu)(liu)(liu)分(fen)(fen)(fen)量(liang)(liang)，其大小为(wei)(wei)t1k时(shi)(shi)刻交(jiao)(jiao)流(liu)(liu)(liu)瞬时(shi)(shi)值(zhi)大小iac(t1k)与直(zhi)流(liu)(liu)(liu)分(fen)(fen)(fen)量(liang)(liang)Id之和。按(an)照前述(shu)对自(zi)(zi)激(ji)振(zhen)荡磁(ci)(ci)(ci)通(tong)门直(zhi)流(liu)(liu)(liu)分(fen)(fen)(fen)量(liang)(liang)测(ce)量(liang)(liang)原(yuan)理推导(dao)可(ke)(ke)得(de)，此时(shi)(shi)在t1k～t2k时(shi)(shi)刻，宁波国产替代(dai)电流(liu)(liu)(liu)传感(gan)器价格大全在科(ke)学研究领域，电流(liu)(liu)(liu)测(ce)量(liang)(liang)对于(yu)(yu)探(tan)索物质的电子(zi)行(xing)为(wei)(wei)、研究化学反应和生物过程等方面具有(you)重(zhong)要意(yi)义(yi)。

传感器(qi)技(ji)术(shu)(shu)(shu)作为21世纪世界(jie)争夺高(gao)(gao)科技(ji)技(ji)术(shu)(shu)(shu)的(de)(de)(de)制(zhi)高(gao)(gao)点的(de)(de)(de)重(zhong)要技(ji)术(shu)(shu)(shu)，同时也(ye)是现代信息(xi)技(ji)术(shu)(shu)(shu)的(de)(de)(de)三大技(ji)术(shu)(shu)(shu)产业的(de)(de)(de)支柱(zhu)之一。电(dian)(dian)(dian)流(liu)传感器(qi)在(zai)电(dian)(dian)(dian)力(li)电(dian)(dian)(dian)子(zi)技(ji)术(shu)(shu)(shu)控制(zhi)和变换领域应(ying)用(yong)(yong)越(yue)来越(yue)广。电(dian)(dian)(dian)流(liu)传感器(qi)不论在(zai)新能(neng)源技(ji)术(shu)(shu)(shu)发(fa)展中的(de)(de)(de)并网控制(zhi)，对过(guo)剩(sheng)能(neng)量存储(chu)以(yi)(yi)及再分配，还是在(zai)智能(neng)电(dian)(dian)(dian)网中的(de)(de)(de)监测(ce)以(yi)(yi)及电(dian)(dian)(dian)能(neng)的(de)(de)(de)分配转换等环节都起(qi)着极其重(zhong)要的(de)(de)(de)作用(yong)(yong)。电(dian)(dian)(dian)流(liu)的(de)(de)(de)精确检测(ce)是高(gao)(gao)频电(dian)(dian)(dian)力(li)电(dian)(dian)(dian)子(zi)应(ying)用(yong)(yong)系(xi)统(tong)(tong)(tong)可靠高(gao)(gao)效运(yun)行的(de)(de)(de)基础。不同于传统(tong)(tong)(tong)电(dian)(dian)(dian)力(li)系(xi)统(tong)(tong)(tong)中的(de)(de)(de)电(dian)(dian)(dian)流(liu)检测(ce)，高(gao)(gao)频电(dian)(dian)(dian)力(li)电(dian)(dian)(dian)子(zi)系(xi)统(tong)(tong)(tong)的(de)(de)(de)电(dian)(dian)(dian)流(liu)检测(ce)存在(zai)很多特殊(shu)的(de)(de)(de)情况。

导致正(zheng)(zheng)(zheng)(zheng)半周(zhou)波自激(ji)振(zhen)荡过程将(jiang)不会(hui)在(zai)(zai)(zai)原(yuan)时(shi)(shi)刻进(jin)入饱(bao)(bao)和(he)区(qu)(qu)， 而是(shi)略(lve)有延后，即铁(tie)芯(xin) C1 工(gong)(gong)作(zuo)(zuo)点将(jiang)滞(zhi)后进(jin)入正(zheng)(zheng)(zheng)(zheng)向饱(bao)(bao)和(he)区(qu)(qu) B；而在(zai)(zai)(zai)正(zheng)(zheng)(zheng)(zheng)向饱(bao)(bao)和(he)区(qu)(qu) B 及负(fu)向 饱(bao)(bao)和(he)区(qu)(qu) C 中，激(ji)磁(ci)(ci)(ci)(ci)电(dian)(dian)(dian)流(liu)(liu)峰值(zhi)仍然满足 I+m=-I-m=Im=ρVOH/RS，且非(fei)线性(xing)电(dian)(dian)(dian)感时(shi)(shi)间(jian)(jian)常数未发 生变化(hua)， 因(yin)此铁(tie)芯(xin) C1 饱(bao)(bao)和(he)区(qu)(qu)自激(ji)振(zhen)荡阶(jie)段， 激(ji)磁(ci)(ci)(ci)(ci)电(dian)(dian)(dian)流(liu)(liu)由 I+th1 正(zheng)(zheng)(zheng)(zheng)向增大至 I+m 的(de)(de)(de)时(shi)(shi)间(jian)(jian)间(jian)(jian)隔 减小， 而激(ji)磁(ci)(ci)(ci)(ci)电(dian)(dian)(dian)流(liu)(liu)由 I-th1 负(fu)向增大至 I-m 的(de)(de)(de)时(shi)(shi)间(jian)(jian)间(jian)(jian)隔增大。 由上述分(fen)析可(ke)知， 测量负(fu)向直 流(liu)(liu)时(shi)(shi)铁(tie)芯(xin)工(gong)(gong)作(zuo)(zuo)点的(de)(de)(de)特征为：铁(tie)芯(xin) C1 工(gong)(gong)作(zuo)(zuo)在(zai)(zai)(zai)正(zheng)(zheng)(zheng)(zheng)向饱(bao)(bao)和(he)区(qu)(qu) B 的(de)(de)(de)时(shi)(shi)间(jian)(jian)小于于铁(tie)芯(xin) C1 工(gong)(gong)作(zuo)(zuo)在(zai)(zai)(zai)负(fu) 向饱(bao)(bao)和(he)区(qu)(qu) C 的(de)(de)(de)时(shi)(shi)间(jian)(jian)，使激(ji)磁(ci)(ci)(ci)(ci)电(dian)(dian)(dian)流(liu)(liu) iex 波形上出(chu)现了正(zheng)(zheng)(zheng)(zheng)负(fu)半周(zhou)波波形上的(de)(de)(de)不对(dui)称(cheng)性(xing)，即由 图 2－5 可(ke)知， 在(zai)(zai)(zai)一次电(dian)(dian)(dian)流(liu)(liu) IP 为负(fu)时(shi)(shi)， 激(ji)磁(ci)(ci)(ci)(ci)电(dian)(dian)(dian)流(liu)(liu) iex 在(zai)(zai)(zai)一个(ge)周(zhou)波内(nei)， 正(zheng)(zheng)(zheng)(zheng)半周(zhou)波电(dian)(dian)(dian)流(liu)(liu)平(ping)均(jun)值(zhi) 大于负(fu)半周(zhou)波电(dian)(dian)(dian)流(liu)(liu)平(ping)均(jun)值(zhi)，采样电(dian)(dian)(dian)阻 RS 上采样电(dian)(dian)(dian)压 VRs 一个(ge)周(zhou)波内(nei)平(ping)均(jun)值(zhi)为正(zheng)(zheng)(zheng)(zheng)。在(zai)(zai)(zai)电(dian)(dian)(dian)气(qi)工(gong)(gong)程中，电(dian)(dian)(dian)流(liu)(liu)测量对(dui)于评估电(dian)(dian)(dian)路的(de)(de)(de)性(xing)能和(he)优化(hua)设计至关重(zhong)要(yao)。

巨(ju)磁(ci)(ci)(ci)(ci)阻（GMR）效应(ying)在微小磁(ci)(ci)(ci)(ci)场(chang)测(ce)(ce)量(liang)领(ling)域实现了(le)(le)创新(xin)性(xing)的(de)(de)(de)(de)(de)(de)(de)改变，尤其(qi)在利用(yong)(yong)涡流(liu)传(chuan)(chuan)感(gan)器(qi)(qi)(qi)进(jin)行无损检(jian)测(ce)(ce)方面取得了(le)(le)很大的(de)(de)(de)(de)(de)(de)(de)进(jin)展。巨(ju)磁(ci)(ci)(ci)(ci)阻传(chuan)(chuan)感(gan)器(qi)(qi)(qi)具(ju)有低功耗、尺(chi)寸(cun)小、高(gao)灵敏度以(yi)及频(pin)率与(yu)灵敏度的(de)(de)(de)(de)(de)(de)(de)不(bu)相关性(xing)等特(te)点(dian)；同(tong)(tong)霍(huo)尔(er)(er)传(chuan)(chuan)感(gan)器(qi)(qi)(qi)相同(tong)(tong)，巨(ju)磁(ci)(ci)(ci)(ci)阻芯片是传(chuan)(chuan)感(gan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)主要组成部分(fen)，一般也容(rong)易受到环境中磁(ci)(ci)(ci)(ci)场(chang)的(de)(de)(de)(de)(de)(de)(de)干扰，不(bu)适用(yong)(yong)于(yu)电(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)环境复杂的(de)(de)(de)(de)(de)(de)(de)环境，对复杂波(bo)形电(dian)(dian)(dian)(dian)流(liu)也不(bu)能(neng)(neng)做(zuo)出准确的(de)(de)(de)(de)(de)(de)(de)检(jian)测(ce)(ce)。磁(ci)(ci)(ci)(ci)通(tong)门(men)传(chuan)(chuan)感(gan)器(qi)(qi)(qi)(Fluxgatecurrentsensor)，一开始主要用(yong)(yong)于(yu)弱磁(ci)(ci)(ci)(ci)场(chang)的(de)(de)(de)(de)(de)(de)(de)检(jian)测(ce)(ce)，比如地磁(ci)(ci)(ci)(ci)场(chang)检(jian)测(ce)(ce)、铁矿石检(jian)测(ce)(ce)、位移(yi)检(jian)测(ce)(ce)和(he)管(guan)道泄漏检(jian)测(ce)(ce)等方面。随(sui)着这(zhei)种(zhong)技(ji)术(shu)的(de)(de)(de)(de)(de)(de)(de)发(fa)展，磁(ci)(ci)(ci)(ci)通(tong)-2-门(men)传(chuan)(chuan)感(gan)器(qi)(qi)(qi)广泛应(ying)用(yong)(yong)于(yu)太(tai)空探(tan)测(ce)(ce)和(he)地质(zhi)勘探(tan)中。磁(ci)(ci)(ci)(ci)通(tong)门(men)电(dian)(dian)(dian)(dian)流(liu)传(chuan)(chuan)感(gan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)结(jie)构类似霍(huo)尔(er)(er)电(dian)(dian)(dian)(dian)流(liu)传(chuan)(chuan)感(gan)器(qi)(qi)(qi)，是基(ji)于(yu)检(jian)测(ce)(ce)磁(ci)(ci)(ci)(ci)路的(de)(de)(de)(de)(de)(de)(de)饱和(he)特(te)性(xing)而设计的(de)(de)(de)(de)(de)(de)(de)。磁(ci)(ci)(ci)(ci)通(tong)门(men)电(dian)(dian)(dian)(dian)流(liu)传(chuan)(chuan)感(gan)器(qi)(qi)(qi)采用(yong)(yong)高(gao)磁(ci)(ci)(ci)(ci)导率的(de)(de)(de)(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)芯，通(tong)过磁(ci)(ci)(ci)(ci)芯的(de)(de)(de)(de)(de)(de)(de)交替饱和(he)，产(chan)生的(de)(de)(de)(de)(de)(de)(de)感(gan)应(ying)电(dian)(dian)(dian)(dian)压和(he)被(bei)测(ce)(ce)电(dian)(dian)(dian)(dian)流(liu)之间(jian)存在着一定的(de)(de)(de)(de)(de)(de)(de)数量(liang)关系，从(cong)而可以(yi)得到被(bei)测(ce)(ce)电(dian)(dian)(dian)(dian)流(liu)。它实际上检(jian)测(ce)(ce)磁(ci)(ci)(ci)(ci)场(chang)的(de)(de)(de)(de)(de)(de)(de)变化(hua)，通(tong)过磁(ci)(ci)(ci)(ci)与(yu)电(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)联(lian)系来得到被(bei)测(ce)(ce)电(dian)(dian)(dian)(dian)流(liu)。近几年(nian)，随(sui)着软(ruan)磁(ci)(ci)(ci)(ci)材(cai)料的(de)(de)(de)(de)(de)(de)(de)发(fa)展和(he)电(dian)(dian)(dian)(dian)子元器(qi)(qi)(qi)件(jian)的(de)(de)(de)(de)(de)(de)(de)革新(xin)，磁(ci)(ci)(ci)(ci)通(tong)门(men)电(dian)(dian)(dian)(dian)流(liu)传(chuan)(chuan)感(gan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)性(xing)能(neng)(neng)不(bu)断(duan)提高(gao)，其(qi)应(ying)用(yong)(yong)范围不(bu)断(duan)扩(kuo)大，受到越来越多(duo)的(de)(de)(de)(de)(de)(de)(de)关注。将磁(ci)(ci)(ci)(ci)调制器(qi)(qi)(qi)与(yu)磁(ci)(ci)(ci)(ci)积分(fen)器(qi)(qi)(qi)结(jie)合，研制用(yong)(yong)于(yu)质(zhi)子同(tong)(tong)步器(qi)(qi)(qi)系统中粒(li)子流(liu)检(jian)测(ce)(ce)的(de)(de)(de)(de)(de)(de)(de)宽(kuan)频(pin)电(dian)(dian)(dian)(dian)流(liu)互感(gan)器(qi)(qi)(qi)，扩(kuo)展了(le)(le)电(dian)(dian)(dian)(dian)流(liu)测(ce)(ce)量(liang)带宽(kuan)。珠海车规级电(dian)(dian)(dian)(dian)流(liu)传(chuan)(chuan)感(gan)器(qi)(qi)(qi)哪(na)家便宜(yi)

电(dian)流测量是电(dian)气(qi)测量中的(de)基本而重要的(de)方面之一，在在科学研(yan)究(jiu)、工业生(sheng)产还是日常生(sheng)活中，都发挥着重要作(zuo)用。宁波国产替代电(dian)流传感器价格大全

当(dang)一(yi)(yi)二次(ci)磁势平(ping)(ping)(ping)衡时，环形铁芯(xin)C1及C2磁势平(ping)(ping)(ping)衡方(fang)程满足(zu)：NPIP+NFIF=0（3－1）由式（3－1）可知，当(dang)系统达(da)到(dao)平(ping)(ping)(ping)衡时，一(yi)(yi)次(ci)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)与(yu)反(fan)(fan)(fan)馈(kui)(kui)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)成比例，比例系数(shu)为NF/NP。即通过(guo)测(ce)(ce)(ce)量(liang)(liang)(liang)反(fan)(fan)(fan)馈(kui)(kui)绕(rao)组(zu)中的(de)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)幅(fu)值大(da)小即可对一(yi)(yi)次(ci)交(jiao)直(zhi)流(liu)(liu)(liu)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)幅(fu)值进行测(ce)(ce)(ce)量(liang)(liang)(liang)，反(fan)(fan)(fan)馈(kui)(kui)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)相位(wei)与(yu)一(yi)(yi)次(ci)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)相位(wei)相反(fan)(fan)(fan)。实际新型交(jiao)直(zhi)流(liu)(liu)(liu)传感器通过(guo)测(ce)(ce)(ce)量(liang)(liang)(liang)串接(jie)在反(fan)(fan)(fan)馈(kui)(kui)绕(rao)组(zu)中的(de)终(zhong)端(duan)(duan)测(ce)(ce)(ce)量(liang)(liang)(liang)电(dian)(dian)(dian)(dian)阻RM上(shang)的(de)终(zhong)端(duan)(duan)测(ce)(ce)(ce)量(liang)(liang)(liang)电(dian)(dian)(dian)(dian)压(ya)信号(hao)(hao)VRM间接(jie)完(wan)成反(fan)(fan)(fan)馈(kui)(kui)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)测(ce)(ce)(ce)量(liang)(liang)(liang)，终(zhong)端(duan)(duan)测(ce)(ce)(ce)量(liang)(liang)(liang)电(dian)(dian)(dian)(dian)压(ya)信号(hao)(hao)VRM与(yu)一(yi)(yi)次(ci)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)IP满足(zu)：I=IF=NNR（3－2）式（3－2）表明终(zhong)端(duan)(duan)测(ce)(ce)(ce)量(liang)(liang)(liang)电(dian)(dian)(dian)(dian)压(ya)信号(hao)(hao)VRM与(yu)一(yi)(yi)次(ci)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)IP成比例，其中负号(hao)(hao)表示(shi)两(liang)者相位(wei)相反(fan)(fan)(fan)。同时根据式（3－2）可得新型交(jiao)直(zhi)流(liu)(liu)(liu)电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)传感器的(de)灵敏度SD1为：dVRMNPRMD1dIPNF宁(ning)波国产替(ti)代电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)传感器价格大(da)全

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