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  • MVC1200高壓變頻器是新一代的高效節能型高壓變頻器,采用直接高高變換的方式,多電平串聯倍壓的技術方案,準最優PWM控制算法,實現優質的可變頻變壓(VVVF)的正弦電壓和正弦電流的輸出。產品具有以下特點。

    V/F控制方式

    MVC1200變頻器采用V/F控制方式,輸出電壓跟頻率成正比,使電機的磁通保持一定,避免弱磁和磁飽和現象的產生,啟動時頻率逐步增加可降低啟動沖擊電流對電動機和電網的沖擊,有效減小了電機故障;


    高-高方式

    輸入采用移相變壓器,單元串聯方式直接高壓輸出;

    風冷設計

    獨特的風道設計,在室溫50℃時,設備能可靠運行。采用頂部散熱方式,維護方便。風機選用國際知名品牌產品,經久耐用;

    模塊化設計

    單元采用模塊化設計,單元可任意互換,單元拆裝方便;

    友好的人機界面

    人機接口采用觸摸屏,全中文界面,方便用戶操作;報警實時記錄,并能對報警準確定位;

    可靠的設計

    (1)單元與控制部分的通訊采用光纖

    (2)單元的熱備設計

    (3)外圍控制部件采用西門子PLC

    (4)主回路重要器件采用進口優質品牌,所有主回路器件額定運行參數 > 實際運行的2倍選購,變壓器按電機額定功率的1.25倍容量配置,配置頂部散熱風機;

    高效率、高功率因素

    整機效率≥98%,功率因素≥95%;

    低諧波

    10KV變頻器輸出每相8單元串聯,采用每相48脈沖整流,高頻載波比使得輸出諧波空載時<4%,負載時<2%;

    寬電壓輸入范圍

    輸入電壓在85%~115%,頻率在45Hz~55Hz波動范圍內設備均能正常工作;

    小的dv/dt

    由于采用單元串聯輸出方式,dv/dt小,延長了IGBT的壽命以及降低了對整個設備絕緣要求;

    單元旁路技術

    采用二極管+晶閘管旁路裝置,當變頻器檢測到某單元的輸出發生故障時,發出指令使相應的旁路裝置動作,同時將故障單元的輸出與電路斷開,并將與故障單元相鄰的兩個單元連接起來,確保單元故障時能夠可靠被旁路;

    線電壓的自動均衡技術

    當某相的某個或幾個單元故障被旁路時,為保證整個變頻器輸出線電壓平衡,MVC1200系列高壓變頻器將切除其他兩相相應的單元;

    特有的過電壓保護技術

    設計中充分考慮操作過電壓和雷電過電壓對設備的影響,在主回路和控制回路針對不同的過電壓采用不同的處理措施,提高設備的可靠性;

    旁路柜可選

    可根據用戶不同的要求配置旁路柜;

    結構簡介

    MVC1200系列高壓變頻器柜由旁路柜、開關柜、變壓器柜、功率柜(含控制柜)四部分組成。 MVC1200系列變頻器的柜體排列圖。

    MVC1200變頻器柜體排列圖

     

     

    序號

    項目

    參數

    備注

    1

    使用標準

    《風機水泵用高壓變頻器》

     

    2

    型式及型號

    MVC1200-06k/×××

    MVC1200-10k/×××

    具體用戶需要而定

    3

    安裝地點

    室內

     

    4

    技術方案

    直接高-高方式

     

    5

    對電動機要求

    普通三相異步電動機

     

    6

    變頻器單元輸入側有無熔斷器

     

    7

    額定輸入電壓/允許變化范圍

    ±5%

     

    8

    系統輸入電壓

    6KV,10KV

     

    9

    系統輸出電壓

    0~6KV,0~10KV

     

    10

    系統輸出電流

     

     

    11

    逆變側最高輸出電壓

    6KV,10KV

     

    12

    額定容量

     

     

    13

    額定輸入頻率/允許變化范圍

    50Hz/±10%

     

    14

    對電網電壓波動的敏感性

    不敏感

     

    15

    變頻器效率

    ≥98%

     

    16

    諧波

    <4%

    17

    輸入側功率因數

    ≥95%

     

    18

    控制方式

    V/F控制

     

    19

    控制電源

    220VAC

     

    20

    整流形式

    3相不可控整流

     

    21

    逆變單元形式

    H橋逆變

     

    22

    傳動象限

    二象限

     

    23

    電隔離部分是否采用光纖電纜

    采用光纖通信

     

    24

    噪聲等級

    ≤75dB

     

    25

    冷卻方式

    強制風冷

     

    26

    冷卻系統故障對變頻器的影響

    在允許范圍內,報警不跳機

     

    27

    過載能力

    120%時60s,150%時5s,200%時立即保護

     

    28

    變壓器損耗

    ≤1.8%

     

    29

    系統總損耗

    ≤2.5%

    30

    標準控制連接

    硬接線

     

    31

    模擬量信號(輸入)規格及數量

    4-20mA,4路

    根據用戶需要擴展

    32

    模擬量信號(輸出)規格及數量

    4-20mA,4 路

     

     

    33

    開關量信號(輸入)規格及數量

    6(繼電器干式節點)

    34

    開關量信號(輸出)規格及數量

    4(繼電器干式節點)

    35

    操作鍵盤

    觸摸屏

    36

    界面語言

    中文/英文

    根據用戶要求而定

    37

    盤前維護或盤后維護

    前后均可維護

     

     

    京ICP備05077126號  京公網安備110108004354號
    华阳彩票
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