MPS-B4540F-SJ52DA

MPS-B4540F-SJ52DA

MPS-B4540F-SJ52DA

MPS-B4540F-SJ52DA

全數(shù)字交流傳動(dòng)系統(tǒng)為ABB公司最新推出的直接轉(zhuǎn)矩控制（DTC）系統(tǒng)，它代表了交流傳動(dòng)的世界領(lǐng)先水平。DTC控制不同于矢量控制，它采用的是控制定子磁鏈的方法，即用空間矢量的分析方法直接在定子坐標(biāo)系下計(jì)算與控制交流電機(jī)的轉(zhuǎn)軌采用定子磁場(chǎng)定向，借助離散的Bznd-Bznd控制產(chǎn)生PWM信號(hào)并直接對(duì)逆變器的開(kāi)關(guān)狀態(tài)進(jìn)行最佳控制數(shù)學(xué)模型的簡(jiǎn)化處理，不需要對(duì)電壓、頻率分別控制的 PWM調(diào)制器，是一種無(wú)超調(diào)，具有高靜、動(dòng)態(tài)性能的全數(shù)字交流調(diào)速方法。DTC的開(kāi)環(huán)動(dòng)態(tài)速度控制精度可以達(dá)到閉環(huán)磁通矢量控制的精度，在不需要光碼反饋（或其他反饋）的情況下，從零速開(kāi)始就可以實(shí)現(xiàn)電機(jī)控制。這就省去了造紙傳動(dòng)中通常用測(cè)速機(jī)、光碼等反饋器件和電纜引線以及干擾等造系統(tǒng)不穩(wěn)和維護(hù)方面的困難，從而大大提高了系統(tǒng)的可靠性。 

3.傳動(dòng)系統(tǒng)的網(wǎng)絡(luò)化設(shè)計(jì) 
3.1全數(shù)字交/直流傳動(dòng)系統(tǒng)構(gòu)成 
        全數(shù)字交／直流調(diào)速裝置采用具有國(guó)際先進(jìn)流調(diào)速器，控制電機(jī)由交流電機(jī)（或直流電機(jī)）組成，變送裝置由光碼（或測(cè)速發(fā)電機(jī)）組成。測(cè)速機(jī)將轉(zhuǎn)速交換成模擬量信號(hào)（光電編碼將轉(zhuǎn)速變換成數(shù)字量）并反饋給控制裝置。 
3.2網(wǎng)絡(luò)化設(shè)計(jì) 包括直流傳動(dòng)系統(tǒng)和交流傳動(dòng)系統(tǒng)。 

Cisco Catalyst WS-C3524-PWR-XL?-EN PoE 15 Available

Cisco Catalyst WS-C3550-24PWR-?SMI PoE With EMI 3550

Cisco Catalyst 3500 XL 12 Port Switch WS-C3512-XL-EN

Cisco Catalyst 2912 (WS-C2912-XL-EN)

Cisco Catalyst 2900 XL 24 Port Switch WS-C2924M-XL-EN

Cisco Catalyst 2912 WS-C2912-XL-EN CCNA CCNP Lab

8X Cisco Catalyst 2900 XL 24 Port Switch WS-C2924-XL-EN

Cisco Catalyst WS-C3524-XL-EN 3524 Warranty

Cisco Catalyst 2950-24 - switch - 24 ports


Cisco Catalyst 3500 WS-C3508G-XL-EN 8-Port GBIC Switch

Cisco WS-X4597 Catalyst 4507R Fan Tray

Cisco Catalyst 3500 Series XL WS-C3548-XL-EN 19035-223

Cisco Catalyst 3500 Series Switch Cisco WS-C3548-XL-EN

Cisco WS-C4948-S Catalyst 4948 48-Port GETH Switch


Cisco Catalyst 2970 - switch - 24 ports

Cisco WS-C3548-XL-EN Catalyst 3548 XL Switch CCIE CCNA


CISCO CATALYST 2900 XL WS-C2912-XL-EN 12 PORT SWITCH


4 New Replacement Fans Cisco Catalyst 3524, 3500, C3524


2 Lot Cisco WS-C2950C-24 Catalyst 2950 24-Port Switch

Cisco Catalyst 3750-24PS - switch - 24 ports PoE

Cisco Catalyst WS-C3550-24PWR-?SMI

Cisco Catalyst WS-C2950-24 switch 24port 2950

Cisco WS-C6K-9SLOT-FA?N2 Fan Module Catalyst 6509 NEW

LOT OF 7- CISCO CATALYST- 2-3500 AND 5-1900 SWITCHES


Cisco Catalyst 3500 XL Ethernet Switch WS-C3524-XL-EN

Cisco Systems Catalyst 3550 Switch 24 Port C3550

Cisco Catalyst 2900 Rack Switch WS-C2924M-XL-EN


CISCO WS-C2950-12 PORT CATALYST SWITCH

Cisco Catalyst 3750-48TS Ethernet Switch WS-C3750-48TS


CISCO CATALYST WS 3550 48 SMI 3550 SWITCH 48 PORTS


Cisco Catalyst 3560G PoE 24-port WS-C3560G-24PS-?S


Cisco Catalyst WS-C3560-48PS-S Switch PoE 48 Ports 3560

Cisco 2950 WS-C2950-24 Catalyst Switch w/Ears


Cisco Catalyst 6500 Supervisor Engine WS-X6K-SUP1A-2G?E


Cisco 2948G Catalyst 48 Port Switch WS-C2948G

Cisco Catalyst 6500 Supervisor Engine WS-X6K-SUP1A-2G?E


Cisco Catalyst 3512XL - switch - 12 ports

Cisco Catalyst 2960-24TC-L Switch W/Rackmount Ears

Cisco WS-C3550-24PWR-??SMI Catalyst Switch

Cisco Catalyst 2960PD-8TT-L - switch - 8 ports NEW


Cisco Catalyst 2960-24TT - switch - 24 ports


Cisco Catalyst 3750G-48PSS - switch - 48 ports

Cisco WS-C3560V2-48PS Catalyst Switch 1YearWrnty 3Xavl


Cisco Catalyst Switch 4000 4006 WS-C4006 3x WS-X4148-RJ

Cisco Catalyst WS-C3550-24-SMI \w EMI 3550 CCNP CCIE

Cisco Catalyst 3560-24TS-S Switch 24 ports tested

Cisco Catalyst 3550 WS-C3550-24-SMI w/ EMI Installed

Cisco Catalyst 2950 Switch 24 10/100 Ethernet Ports

Cisco Catalyst 2950G-24 - switch - 24 ports

Cisco Catalyst 3550 24 Port Switch, WS-C3550-24-EMI


Cisco Systems Catalyst 3500 Series WS-C3524-PWR-XL?-EN

Cisco Catalyst 3560 Series PoE-24 Switch

Cisco WS-C4503 Catalyst Chassis

Cisco Catalyst WS-C2950T-24 SWITCH W/ EARS

Cisco Catalyst 2948G WS-C2948G Switch No Password V4.5

CISCO CATALYST 2980G Catalyst 2900 48-Port Switch

Cisco Catalyst 2950 48-Port Switch GBIC WS-C2950G-48-EI

New Cisco Catalyst 3750-48TS-S - switch - 48 ports

Cisco Catalyst 2960-24PC POE

Cisco Catalyst WS-C3550-48-SMI /w EMI CCNP CCIE 3550

Cisco 2950 WS-C2950-24 Catalyst Switch W/ Ears Console

Lot of 3 Cisco Catalyst 1900 Switches

Cisco Catalyst 3500 XL 48-Port Switch, WS-C3548-XL-A

Cisco Catalyst 3500 Series XL

Cisco Catalyst WS-C3548-XL-EN Replacement Fan Kit 3548

Cisco Catalyst 2950 Switches

MEM-MSFC2-512MB 512MB Cisco Catalyst 6500 MSFC2 Memory

CISCO CATALYST 4006 SWITCH WS-X4232-GB-RJ WS-X4013

Cisco Catalyst WS-C4948-E Switch 4948-E / C4948