IC693ALG220 称重传感器

IC693ALG220 称重传感器

变频调速器是把工频电源(50Hz或60Hz)变换成频率的交流电源，以实现电机的变速运行的设备，其中控制电路完成对主电路的控制，整流电路将交流电变换成直流电，直流中间电路对整流电路的输出进行平滑滤波，逆变电路将直流电再逆成交流电。

变频调速器（frequency changer / frequency converter）是一种用来改变交流电频率的电气设备。此外，它还具有改变交流电电压的辅助功能。

过去，变频调速器一般被包含在电动发电机、旋转转换器等电气设备中。随着半导体电子设备的出现，人们已经可以生产独立的变频调速器。

对于如矢量控制变频器这种需要大量运算的变频器来说，有时还需要一个进行转矩计算的CPU以及一些相应的电路。变频调速是通过改变电机定子绕组供电的频率来达到调速的目的。

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(门可关断晶闸管)、BJT(双型功率晶体管)、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(绝缘栅双型晶体管)、HVIGBT(耐高压绝缘栅双型晶闸管)的发展过程，器件的更新了电力电子变换技术的不断发展。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。

GENERAL ELECTRIC DS3800NHVE1C1C   DS3800NHVE1C1C

GENERAL ELECTRIC DS3800NHVE1C1C CIRCUIT BOARD *OUT OF *

GENERAL ELECTRIC DS3800NHVE1C1C 6BA03 BOARD

GENERAL ELECTRIC DS3800NHVE1C1A   DS3800NHVE1C1A

GENERAL ELECTRIC DS3800NHVE1C1A 6BA01

GENERAL ELECTRIC DS3800NHVE1B1A CIRCUIT BOARD **

GENERAL ELECTRIC DS3800NHVE PC CIRCUIT BOARD DS3800NHVE1C1A

GENERAL ELECTRIC DS3800NHVD1E1E POWER BOARD

GENERAL ELECTRIC DS3800NHVD1E1B   DS3800NHVD1E1B

General Electric DS3800NHVD-1E1B DS3800NHVD-1EB1 Power Board -No 

GENERAL ELECTRIC DS3800NHVD1E1B **

GENERAL ELECTRIC DS3800NHVD1D1B   DS3800NHVD1D1B

GENERAL ELECTRIC DS3800NHVD1C1B   DS3800NHVD1C1B

General Electric DS3800NHVD1C1B PCB -

GENERAL ELECTRIC DS3800NHFA1D1B CIRCUIT BOARD **

GENERAL ELECTRIC DS3800NGTC1B1C   DS3800NGTC1B1C

GENERAL ELECTRIC DS3800NGTA1F1E BOARD

GENERAL ELECTRIC DS3800NGTA1E1D   DS3800NGTA1E1D

GENERAL ELECTRIC DS3800NGTA1E1D     DS3800NGTA1E1D

GENERAL ELECTRIC DS3800NGTA1D1D   DS3800NGTA1D1D

GENERAL ELECTRIC DS3800NGRD1B1A PC BOARD REPAIRED

GENERAL ELECTRIC DS3800NGRC1H1G   DS3800NGRC1H1G

GENERAL ELECTRIC DS3800NGRC1H1G REGULATOR BOARD

GENERAL ELECTRIC DS3800NGRC1H1F   DS3800NGRC1H1F

GENERAL ELECTRIC DS3800NGRC1H1F REGULATOR BOARD **

GENERAL ELECTRIC DS3800NGRC1F1F   DS3800NGRC1F1F

GENERAL ELECTRIC DS3800NGRC1D1D   DS3800NGRC1D1D

GENERAL ELECTRIC DS3800NGRC    DS3800NGRC

GENERAL ELECTRIC DS3800NGRA1L1E   DS3800NGRA1L1E

GENERAL ELECTRIC DS3800NGRA1L1E REGULATOR PC BOARD **

General Electric DS3800NGRA1L1E 6BA08 C-ESS Needs Connector -

GENERAL ELECTRIC DS3800NGRA1L1E 6BA08

GENERAL ELECTRIC DS3800NGRA1L1D   DS3800NGRA1L1D

General Electric DS3800NGRA1L1D Regulator Board 6BA07 - Refurbished

General Electric DS3800NGRA1L1D Circuit Board

GENERAL ELECTRIC DS3800NGRA1L1D BOARD REGULATOR

GENERAL ELECTRIC DS3800NGRA1J1D CIRCUIT BOARD **

GENERAL ELECTRIC DS3800NGRA1H1C CIRCUIT BOARD **

GENERAL ELECTRIC DS3800NGRA1H1C CIRCUIT BOARD **

GENERAL ELECTRIC DS3800NGRA1G1B REGULATOR BOARD **

GENERAL ELECTRIC DS3800NGRA1G1B REGULATOR BOARD

GENERAL ELECTRIC DS3800NGRA1F1B   DS3800NGRA1F1B

GENERAL ELECTRIC DS3800NGPA1B1C PC BOARD WITH DS3800DGPA1A1B BOARD

GENERAL ELECTRIC DS3800NGPA1B1C PC BOARD

GENERAL ELECTRIC DS3800NGPA1B1C BOARD W/ DS3800GPA1A1B BOARD

GENERAL ELECTRIC DS3800NGMA1B1A PC BOARD

GENERAL ELECTRIC DS3800NGMA1B1A BOARD WITH DS3800DGPA1A1B

GENERAL ELECTRIC DS3800NGMA1B1A BOARD *IN A *

GENERAL ELECTRIC DS3800NFMC1F1E BOARD

GENERAL ELECTRIC DS3800NFMC1F1D FAULT FINDER PC BOARD

GENERAL ELECTRIC DS3800NFLA1C1C   DS3800NFLA1C1C

GENERAL ELECTRIC DS3800NFLA1C1C    DS3800NFLA1C1C

GENERAL ELECTRIC DS3800NFLA   DS3800NFLA

GENERAL ELECTRIC DS3800NFEXIBIA   DS3800NFEXIBIA

GENERAL ELECTRIC DS3800NFCF1J1G   DS3800NFCF1J1G

GENERAL ELECTRIC DS3800NFCF1J1E BOARD **

GENERAL ELECTRIC DS3800NFCF1F1E   DS3800NFCF1F1E

GENERAL ELECTRIC DS3800NFCF1F1D   DS3800NFCF1F1D

GENERAL ELECTRIC DS3800NFCF1D1D   DS3800NFCF1D1D

GENERAL ELECTRIC DS3800NFCF1D1C   DS3800NFCF1D1C

GENERAL ELECTRIC DS3800NFCF1C1C   DS3800NFCF1C1C

GENERAL ELECTRIC DS3800NFCF1C1B   DS3800NFCF1C1B

GENERAL ELECTRIC DS3800NFCD-ISIK PC BOARD FIRING CIRCUIT DS3800NFCDISIK

General Electric DS3800NFCDISIK Circuit Board 6BA12 C-ESS -

GENERAL ELECTRIC DS3800NFCD1S1L   DS3800NFCD1S1L

GENERAL ELECTRIC DS3800NFCD1S1L FIRING CIRCUIT BOARD

GENERAL ELECTRIC DS3800NFCD1S1L CIRCUIT BOARD **

GENERAL ELECTRIC DS3800NFCD1S1K   DS3800NFCD1S1K

GENERAL ELECTRIC DS3800NFCD1S1K FIRING CIRCUIT PC BOARD **

GENERAL ELECTRIC DS3800NFCD1S1J   DS3800NFCD1S1J

GENERAL ELECTRIC DS3800NFCD1Q1H   DS3800NFCD1Q1H

GENERAL ELECTRIC DS3800NFCD1Q1H FIRING CIRCUIT BOARD

GENERAL ELECTRIC DS3800NFCD1Q1E BOARD **

General Electric DS3800NFCD1N1E Circuit Board -No 

GENERAL ELECTRIC DS3800NFCD1L1E   DS3800NFCD1L1E

GENERAL ELECTRIC DS3800NFCD1L1E FIRING CIRCUIT CARD

GENERAL ELECTRIC DS3800NFCD1L1E CIRCUIT BOARD **

General Electric DS3800NFCD1L1E Circuit Board -

GENERAL ELECTRIC DS3800NFCD1L1E 6BA07 BOARD

General Electric DS3800NFCD1L1D PC Board

GENERAL ELECTRIC DS3800NFCD1K1E   DS3800NFCD1K1E

GENERAL ELECTRIC DS3800NFCD1K1E CIRCUIT BOARD **

GENERAL ELECTRIC DS3800NFCD1K1D   DS3800NFCD1K1D

GENERAL ELECTRIC DS3800NFCD1K1D PC BOARD **

GENERAL ELECTRIC DS3800NFCD1K1D FIRING CIRCUIT BOARD

GENERAL ELECTRIC DS3800NFCD1K1C   DS3800NFCD1K1C

GENERAL ELECTRIC DS3800NFCD1J1D CIRCUIT BOARD **

GENERAL ELECTRIC DS3800NFCD FIRING BOARD DS3800NFCD1L1E

GENERAL ELECTRIC DS3800NEPD1H1E PC BOARD **

GENERAL ELECTRIC DS3800NEPD1F1C CIRCUIT BOARD **

GENERAL ELECTRIC DS3800NEPD1F1B PC BOARD **

GENERAL ELECTRIC DS3800NEPD   DS3800NEPD

GENERAL ELECTRIC DS3800NEPB1F1E W/ DS3800DEPB1A1B W/ DS3820HSMD1C1F **

GENERAL ELECTRIC DS3800NEPB1F1E   DS3800NEPB1F1E

GENERAL ELECTRIC DS3800NEPB1F1E CARD MOTOR EXCITER

GENERAL ELECTRIC DS3800NEPB1D1D   DS3800NEPB1D1D

GENERAL ELECTRIC DS3800NEPB1C1C   DS3800NEPB1C1C

GENERAL ELECTRIC DS3800NEPB1C1B   DS3800NEPB1C1B

GENERAL ELECTRIC DS3800NEPB1B1B   DS3800NEPB1B1B

GENERAL ELECTRIC DS3800NEPA1F1E   DS3800NEPA1F1E

GENERAL ELECTRIC DS3800NEPA1F1E PC BOARD PWB EXCITER **

GENERAL ELECTRIC DS3800NEPA1F1E PC BOARD PWB EXCITER

GENERAL ELECTRIC DS3800NEPA1F1E PC BOARD PWB EXCITER

GENERAL ELECTRIC DS3800NEPA1F1E PC BOARD *IN A *

GENERAL ELECTRIC DS3800NEPA1F1E PC BOARD (AS PICTURED) **

GENERAL ELECTRIC DS3800NEPA1E1D   DS3800NEPA1E1D

GENERAL ELECTRIC DS3800NEPA1E1D PWB EXCITER PC BOARD **

General Electric DS3800NEPA1E1D Excitor Board -

General Electric DS3800NEPA1E1D Excitor Board -No 

General Electric DS3800NEPA1E1D Exciter Board GE Systems - Refurbished

GENERAL ELECTRIC DS3800NEPA1D1C   DS3800NEPA1D1C

GENERAL ELECTRIC DS3800NEPA1D1C PWB EXCITER BOARD **

General Electric DS3800NEPA1D1C PC Board

General Electric DS3800NEPA1D1C 6BA04 PC Board (Pack of 3) -

General Electric DS3800NEPA1D1C 6BA04 PC Board -

GENERAL ELECTRIC DS3800NEPA1D1B   DS3800NEPA1D1B

GENERAL ELECTRIC DS3800NEPA1D1A   DS3800NEPA1D1A

GENERAL ELECTRIC DS3800NEPA1C1B   DS3800NEPA1C1B