FBM207
FBM207
FBM207
交流调速有多种方法(异步电动机的变极调速、调压调速、转子串电阻调速、电磁转差离合器调速,液力耦合器调速、机械差动调速、变频调速等),但主流是变频调速。变频调速的变频电源有旋转变频机组和静止变频装置。前者由异步或同步电动机-支流发电机和直流电动机-同步发电机两套机组组成。后者则由电力电子器件和微电子器件组成,吴可动部分。由于旋转变频机组设备庞大、有可动部分、维护量大、效率低和性能差,故已被静止变频装置代替。
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静止变频装置就是现在广泛使用的变频装置,可分为交-直-交变频和交-交变频两大类,交-直-交变频又可分为电压型和电流型两大类,交-交变频多位电压型、也有少量使用电流型。变频控制方式分为电压型、电流型、脉冲宽度调制型等。其主回路的拓扑、控制策略都有多种方式可以选择,如功率器件有SCR(晶闸管,Thyristor)、GTO(门极关断晶闸管,Gate Turn-Off Thyristor)、IGBT(绝缘栅双极晶体管,Insulated-Gate Bipolar Transistor)、IGCT(集成门极换流晶闸管,Integrated Gate Commutated Thyristor,是一种新型半导体功率器件,在GTO的基础发展起来的)等;主回路的拓扑结构可选择两电平、三电平、负载换相式SCR电流型变频器等,控制策略可选择V/f控制、矢量控制、直接转矩控制、脉冲宽度控制(PWM)或脉冲幅度调制(PAM)等,电压也有高压(3~6kV,主要是大容量的同步或异步电动机)、中压或低压(如一般的小功率380V和轧钢辅传动的电动机)等,一般地说,1000kW以下的电动机较适合采用IGBT的通用变频器。国外电气公司,如德国西门子、法国阿尔斯通、瑞典ABB、美国GE、意大利ANSOLDO、日本日立、日本三菱、日本安川等公司都生产各种容量、不同电压的通用变频器可供选用,选择时可适当参照其业绩及在类似或同样机组使用情况和经验与效果。
变频所用电动机也需注意,一般1000kW以下的电动机,采用异步电动机性能价格比较好,对于容量较大的可采用同步电动机或异步电动机。异步电动机一般采用线绕电机,而容量较小的电动机一般采用鼠笼电机。由于传动控制系统一般采用PWM变频器,故电机也须特殊设计,以满足PWM变频调速的要求(按不同机组情况,包括允许过载%、过载时间、工作制、绝缘等级、保护等级、额定电压等)。
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FISHER ROSEMOUNT PROVOX RAM INTERFACE DM6004X1-FA1
Fisher DM6461X1-A3 Provox Discrete Output Card
FISHER PROVOX CL6201 CONTROLLER - USED - 1 YR GUARANTEE
FISHER PROVOX CL6601X1-HA5 I/O DRIVER BOARD 40B6016X32
FISHER PROVOX CIRCUIT BOARD DH7201X1-A4 39A2990X042J
FISHER PROVOX CIRCUIT BOARD DH7201X1-A1 39A2990X012
FISHER ROSEMOUNT PROVOX MPU MULTILAYER CL7661X1-A11
FISHER PROVOX DM6004X1-EA2 MPU ROM BOARD CRIMISCX1-A3
FISHER PROVOX DH6011X1-GA2 MPU ROM BOARD 48A8364
FISHER PROVOX DH6011X1-GA3 MPU ROM BOARD 30B6080
FISHER PROVOX DH62201X1-BA1 MPU ROM BOARD 48A8364
FISHER PROVOX CL7661X1-BA5 MEM & CL7661X1-A10 MPU P5.3
Fisher Rosemount Provox MUX I/O 24Vdcty.6 Cards
Fisher Rosemount Provox Provue MEMBRANE Keyboard DC6400
Fisher Rosemount Provox Data Highway II CIAII 2 DH7721
ROSEMOUNT FISHER PROVOX RCIA CARD CL7701X1-A1
FISHER PROVOX I/O DRIVER 41B5810 CL7675X1-A10 & BA5
FISHER PROVOX HIGH DENSITY RAM BATTERY BACKUP CL6601X1*
FISHER ROSEMOUNT PROVOX DISCRETE I/O TERM CL6343X1-A3
FISHER ROSEMOUNT PROVOX DISCRETE I/O TERM CL6343X1-A3
FISHER ROSEMOUNT PROVOX INPUT RELAY MODULE CL6751A5
FISHER ROSEMOUNT PROVOX POWER CONNECT CP6701X1-EA2 REVC
FISHER ROSEMOUNT PROVOX ISOLATED I/O DH6005X1-DA1
FISHER PROVOX COMMUNICATION INTERFACE CL7652X1-A2
ROSEMOUNT FISHER PROVOX ANALOG OUTPUT DM6421X1-A1
FISHER PROVOX CIRCUIT BOARD DH7201X1-A1 39A2990X132
ROSEMOUNT FISHER PROVOX MUX INTERFACE CP6601X1-CA1
FISHER PROVOX DH6001X1-FA4 MPU ROM BOARD 30B6080
FISHER ROSEMOUNT PROVOX CIA CARD DH7001X1-A3
FISHER ROSEMOUNT PROVOX CONFIGURE CONTROL CL7001X1-A10
FISHER ROSEMOUNT PROVOX CP6701X1-EA1 POWER CONNECT REVA
Fisher Rosemount Provox MUX JTC CARD DM6351X1-A1
FISHER ROSEMOUNT PROVOX DISCRETE INPUT DM6361X1-A1
FISHER ROSEMOUNT PROVOX DISCRETE OUTPUT DM6461X1-A3
FISHER PROVOX COMMUNICATION INTERFACE CL7652X1-A1
Fisher Rosemount Provox DISCRETE I/O CARD CL6721X1-A3
FISHER PROVOX SMART INPUT MODULE CL6827X1-A1 REV E P3.1
ROSEMOUNT FISHER PROVOX CIA11 CARD DH7721X1-A1
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FISHER ROSEMOUNT PROVOX VM01 RAM CARD CL6601-X1-JA12/?13
FISHER PROVOX MUX SERIAL INTERFACE CARD CP6601X1-CA3
Fisher Rosemount Provox MUX JTC CARD DM6351X1-A2
Fisher Rosemount Provox MUX DO CARD DM6461X1-A3 MOMENT
FISHER ROSEMOUNT PROVOX I/O DRIVER CL7675X1-BA1 41B5810
FISHER PROVOX CL7661X1-BA5 MEM & CL7661X1-A10 MPU P5.2
Fisher Provox Circuit Board DM6311X1-A1
Fisher PROVOX DM6461X1-A3 Discrete Output Board
FISHER ROSEMOUNT PROVOX MPU MULTILAYER CL7661X1-A6
Fisher PROVOX CL7015X1-A3 PROCESS I/O Board
FISHER PROVOX FIELD SERVER SERIES DRIVER #CL7676X1-A10
FISHER PROVOX COMM. RAM CARD #DH7201X1-A1
Fisher PROVOX CRIMISCX1-A3 MPU/ROM ASSY. Board
FISHER ROSEMOUNT PROVOX I/O DRIVER CL7675X1-BA1 41B5810
Fisher PROVOX CP6701X1-EA1 Power Connection Board
Fisher PROVOX CP6701X1-EA2 Power Connection Board
Fisher PROVOX COMMONX1-AA2 Serial Interface Board
Fisher PROVOX CP6701X1-EA1 PWR Connection Board
Fisher PROVOX CL6012X1-CA1 PIO Relay Module 28A9730X012
Fisher PROVOX CL6012X1-BA1 Relay Module 28A9726X012
FISHER PROVOX MPU-ROM CIRCUIT BD #DH62201X1-BA1
Refurbished Fisher PROVOX CL7015X1-A3 Process I/O Board
Fisher Provox Circuit Board CL6601X1 Control Unit
Fisher Provox Circuit Board DM6361X1-A1
Fisher Provox Circuit Board CL7011X1-A5
Fisher Provox Circuit Board CL7011X1-A1
Fisher Provox Circuit Board DH6011X1-GA2 Data Conc
Fisher Provox Circuit Board DH7201X1-A1
Fisher Provox Circuit Board DM6421-A1 Current Out
Fisher Provox Circuit Board CL7011X1-A2
Fisher Provox Circuit Board DH6011X1-CA1
Fisher Provox Circuit Board CL6601X1-JA152 Control Unit
Fisher CL6011X1-B1 IAC MPU Provox PCA NNB 30B4113X01R