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300V4160 Reliance 電機
300V4160 Reliance 電機
300V4160 Reliance 電機
電壓型變頻器主電路包括：整流電路、中心直流電路、逆變電路三部分組，交-直-交型變頻器結構見附圖1
2）中心濾波電路：整流後的電壓為脈動電壓，有必要加以濾波；濾波電容CF除濾波效果外，還在整流與逆變之間起去耦效果、攪擾、進步功率要素，因為該大電容貯存能量，在斷電的短時間內電容兩頭存在高壓電，因此要在電容充沛放電後才可進行操作。
4）逆變電路： 逆變管V1~V6組成逆變橋將直流電逆變成頻率、幅值都可調的溝通電，是變頻器的中心部分。常用逆變模塊有：GTR、BJT、GTO、IGBT、IGCT等，一般都選用模塊化結構有2單元、4單元、6單元
（1）電機繞組為理性具有無功重量，VD1~VD7為無功電流返回到直流電源供給通道
（3）V1~V6進行逆變進程是同一橋臂兩個逆變管不停地交替導通和截止，在換相進程中也需求D1~D6供給通路。
因為逆變管V1~V6每次由導通切換到截止狀況的瞬間，C極和E極間的電壓將由近乎0V上升到直流電壓值UD，這過高的電壓增長率可能會損壞逆變管，吸收電容的效果就是下降V1~V6關斷時的電壓增長率。
電機在減速時轉子的轉速將可能超越此時的同步轉速（n=60f/P）而處於再生制動（發電）狀況，拖動體係的動能將反應到直流電路中使直流母線（濾波電容兩頭）電壓UD不斷上升（即所說的泵升電壓），這樣變頻器將會發生過壓維護，甚至可能損壞變頻器，因此需將反應能量耗費掉，制動電阻就是用來耗費這部分能量的。制動單元由開關管與驅動電路構成，其功能是用來操控流經RB的放電電流IB。 
以下產品，歡迎隨時垂詢：
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Reliance Motor York Chiller YS NN NN S7 024-25253-019 2VYQ08936-QT 992 1000 HP
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NEW RELIANCE 400HP 460V-AC 3550RPM 10EA5006S 3PH AC ELECTRIC MOTOR D387850
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Rebuilt Reliance RPMIII DC Motor 4KA437173 -US MC3612ATZ 100 HP 1150/1380RPM
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Reliance Electric Brushless AC Motor, 02KYL90945-JA
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RELIANCE 57C411 *SEALED*
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FEDERAL PACIFIC RELIANCE ELECTRIC 575/332V 60HZ 3PH 750KVA TRANSFORMER MODEL 36B
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New Reliance Electric Power Supply Module 57493-A
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Reliance Electric GV3000ISE Sensorless AC DRIVE 350HP
NEW RELIANCE ELECTRIC FLEXPAK 3000 DC DRIVE 40FN4042 40HP 460VAC/500VDC
RELIANCE 200HP ELECTRIC MOTOR 1190RPM 460V 449T 3PH
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NEW SEALED RELIANCE ELECTRIC 57C493 POWER SUPPLY 376 WATT CIRCUIT REV. 02
Reliance Electric ES371AMB Power Supply 376Watt 57C493 NEW
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豫公安備 41010502000017號