0041-5066顶级品质

0041-5066顶级品质

105-PW23电子元件

100-C12KA10重磅供应

100-CX95N11预购从速

变频技术是应交流电机无级调速的需要而诞生的。20世纪60年代以后，电力电子器件经历了SCR(晶闸管)、GTO(门极可关断晶闸管)、BJT(双极型功率晶体管)、MOSFET(金属氧化物场效应管)、SIT(静电感应晶体管)、SITH(静电感应晶闸管)、MGT(MOS控制晶体管)、MCT(MOS控制晶闸管)、IGBT(绝缘栅双极型晶体管)、HVIGBT(耐高压绝缘栅双极型晶闸管)的发展过程，器件的更新促进了电力电子变换技术的不断发展（注意，正因为如此，所以变频器的产生便是在这个背景下的）。20世纪70年代开始，脉宽调制变压变频(PWM－VVVF)调速研究引起了人们的高度重视。20世纪80年代，作为变频技术核心的PWM模式优化问题吸引着人们的浓厚兴趣，并得出诸多优化模式，其中以鞍形波PWM模式效果最佳。20世纪80年代后半期开始，美、日、德、英等发达国家的VVVF变频器已投入市场并获得了广泛应用。至于想了解各类变频器工作原理的话，不妨由简至繁的看看变频器控制方式的四种演变。

Fu Zhou ZhuoKai  Electric Co., Ltd.
公司简称：卓凯电子
公司地址：福州市台江区金融街万达广场二期A2#写字楼11层12室
公司聯络人：李工(销售工程师)
Tel：0591-62182520
Fax：0591-62032566
Phone：13696852881
商务QQ：1273632994
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ABPLC1785-L20B/C

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22-COMM-D

PCD4.M145CPU

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1747-C13

AB1747-L541SER.B1747L541

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MoellerFAZ-B25/4?279037?Leitungsschutzschalter

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EMERSONDELTAVKJ4001X1-NA1

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AB1747-L531/DProcessor

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SEWEURODRIVEBMG05HFDISCMOTORBRAKE

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6DR1900-56DR2100-5

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HE693THM809

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UAGSEWMFFCD21

ALLENBRADLEY2711-KA1PANELVIEWSER.BREV.A*NICE*

XC3142-3PC84CXilinix

1757-SRM

3ASC25H203

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WH50-30RJIWEL

3100-MCM

OMRONE2E-X10D15-NNSPPE2EX10D15N

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Klockner-MoellerEBE211ADJUSTABLETIMERMODULE

815EOV16AB815EOV16

Schneider10140XTS00200端子

140CPU43412A

CIMR-AB4A0675

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