2711-T6C5L1现货

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转差功率回馈型
为了实现绕线式异步电动机的转速调节，还可采用在转子回路串电势的方法。这种在转子回路引入附加电势进行调速的方法，称为绕线式异步电动机的串级调速。
串级调速的关键是串入到转子回路的电势Ef的频率必须与转子电势频率f2相等，但f2是随着转速的变化而变化的，即f2是由旋转磁场转速n0和转子转速n决定的。
但要串入一个*跟随着转速的变化而变化的电势Ef是相当困难的。解决的办法是先把转子电势整流成直流电势Ed，再在此直流回路中串入一与Ef相当的可调节的直流电势，就可避免*改变Ef频率的困难了。具体的实现串级调速有下述三种方式：
种是由一台直流电动机与主绕线式异步电动机组成的串级调速系统，这种系统叫机械串级调速系统或叫克莱墨系统。第二种是由一台直流电动机、一台交流发电机与主绕线式异步电动机组成的串级调速系统，这种系统叫电机式串级调速系统或谢菲尔毕斯系统。第三种是由变频器与绕线式异步电动机组成的串级调速系统，这种系统叫晶闸管串级调速系统或静止谢菲尔毕斯系统。上述种及第二种串级调速方式过去早有应用，第三种晶闸管串级调速是一种新的串级调节方式，它在目前应用广泛，已有取代、二种串级调速的趋势。
与转子串电阻方式相比较，转子串电势的串级调速的优越性是可以回收转差损失，仅是在晶闸管等变流器件变流时产生一些不大的变流损失，所以绕线式异步电动机的串级调速是一种*调速方式。
晶闸管串级调速系统又可分为低（次）同步串级调速系统和超同步串级调速系统两种。当串接到绕线式异步电动机转子上的附加电势Ef 与转子电势SE20反向时，电动机的转速只能朝电动机额定转速以下的方向调节，运行转速恒低于电动机的同步转速，称为低（次）同步串级调速。当Ef与SE20既可同向串接，又可反向串接时，电动机的运行转速既可高于又可低于电动机的同步转速，称为超同步串级调速，或称为双馈调速。
图24所示为低同步串级调速系统的原理图，绕线式异步电动机的转差电势E2（SE20）经三相整流桥ZL 整流为直流电势Ed，再经电抗器L 滤波后，加到三相逆变桥NB上。由晶闸管组成的三相有源逆变器NB的作用有两个：一是为转子回路提供附加直流电势E茁，它与直流电势Ed相当，因是低同步串级调速，所以其方向与转子直流电势Ed相反；二是把直流电再逆变为与电网同频率的三相交流电，从而把转差功率PS通过逆变变压器T匹配成电网电压，送回电网。
图25为超同步晶闸管串级调速系统的原理图。

Allen-Bradley PanelView 1200 Operator Interface 2711E-T12C6
Allen-Bradley PanelView 1200 Operator Interface 2711E-T12C6
Allen-Bradley PanelView 1200 Operator Interface 2711E-T12C6
Allen-Bradley PanelView 1200 Operator Interface 2711E-T12C6
Allen-Bradley Panel View 600 Plus
Allen-Bradley Panel View 600 Plus
Allen-Bradley Panel View 600 Plus
Allen-Bradley Panel View 600 Plus
Allen-Bradley Panel View 550 Series C 2711-B5A5X WOW
Allen-Bradley Panel View 550 Series C 2711-B5A5X WOW
Allen-Bradley Pane/View 300 Micro
Allen-Bradley Pane/View 300 Micro
ALLEN-BRADLEY P/N: 1492-CB3
ALLEN-BRADLEY P/N: 1492-CB3
ALLEN-BRADLEY P/N: 1492-CB3
ALLEN-BRADLEY P/N: 1492-CB3
ALLEN-BRADLEY P/N: 1492-CB3
Allen-Bradley Output Module 4 Point 24VDC 1734-0B4E NIB
ALLEN-BRADLEY OUTPUT MODULE 1771-OA SERIES B
ALLEN-BRADLEY OUTPUT MODULE 1771-OA SERIES B
Allen-Bradley Output Module 1746-OV16
Allen-Bradley Operator Interface Panel 2705-P11J1 Ser C
Allen-Bradley Operator Interface Panel 2705-P11J1 Ser C
Allen-Bradley MobileView Guard G750 2727-G7P20D106
Allen-Bradley MobileView Guard G750 2727-G7P20D106
Allen-Bradley MobileView Guard G750
Allen-Bradley MobileView Guard G750
ALLEN-BRADLEY MICROLOGIX 1200 1762-OF4 4 CH. ANALOG OUTPUT MODULE SER QUANTITY
ALLEN-BRADLEY MICROLOGIX 1200 1762-OF4 4 CH. ANALOG OUTPUT MODULE SER QUANTITY
ALLEN-BRADLEY MICROLOGIX 1200 1762-OF4 4 CH. ANALOG OUTPUT MODULE SER QUANTITY
ALLEN-BRADLEY LOT! CAT 1201-HAZ 2 PROGRAMMING TER.
ALLEN-BRADLEY LOT! CAT 1201-HAZ 2 PROGRAMMING TER.
ALLEN-BRADLEY LOT! CAT 1201-HAZ 2 PROGRAMMING TER.
Allen-Bradley InView Message Display 2706-P22R
Allen-Bradley InView Message Display 2706-P22R
ALLENBRADLEY FLEX I/O ANALOG OUTPUT MODULE CAT:1794-OF4I
ALLENBRADLEY FLEX I/O ANALOG OUTPUT MODULE CAT:1794-OF4I
ALLENBRADLEY FLEX I/O ANALOG OUTPUT MODULE CAT:1794-OF4I
Allen-Bradley Flex I/O 1794-1816 24 VDC Sink Input
Allen-Bradley Flex I/O 1794-1816 24 VDC Sink Input
Allen-Bradley Flex I/O 1794-1816 24 VDC Sink Input
Allen-Bradley FLEX DC Output Module 24VDC 1794-OV16
Allen-Bradley DC Output Module 12-24V 1771-OB Series B Allen Bradley
Allen-Bradley DC Output Module 12-24V 1771-OB series B
ALLEN-BRADLEY DATALINER OPERATOR INTERFACE CAT2706-D21J8
ALLEN-BRADLEY DATALINER OPERATOR INTERFACE CAT2706-D21J8
ALLEN-BRADLEY DATALINER OPERATOR INTERFACE CAT2706-D21J8
ALLEN-BRADLEY DATALINER OPERATOR INTERFACE CAT2706-D21J8
ALLEN-BRADLEY DATALINER OPERATOR INTERFACE CAT2706-D21J8
ALLEN-BRADLEY ConTROLLOGIX 1756-OB16I/A DC ISOL OUTPUT MODULE QUANTITY
Allen-Bradley Color PanelView Plus 1000 Operator Interface
Allen-Bradley Color PanelView Plus 1000 Operator Interface
Allen-Bradley Cat. No. 1771-OGD TTL Output Module
Allen-Bradley CAT. No 1771-OBD/B 10-60 VDC Output Module

2711-T6C5L1质保1年

Allen Bradley PanelView 1400 2711-K14C15
Allen Bradley PanelView 1400 2711-K14C15
ALLEN BRADLEY PANELVIEW 1200e OPERATOR INTERFACE 2711
ALLEN BRADLEY PANELVIEW 1200 TERMINAL OPERATOR INTERFACE 2711-TC1MC SER. G
ALLEN BRADLEY PANELVIEW 1200 TERMINAL OPERATOR INTERFACE 2711-TC1MC SER. G
ALLEN BRADLEY PANELVIEW 1200 OPERATOR INTERFACES 2711
Allen Bradley Panelview 1200 Monitor 2711-TC1X Series C WARRANTY
Allen Bradley Panelview 1200 Monitor 2711-TC1X Series C WARRANTY
Allen Bradley Panelview 1200 Monitor 2711-TC1X Series C WARRANTY
Allen Bradley Panelview 1200 Monitor 2711-TC1X Series C WARRANTY
ALLEN BRADLEY PanelView 1200 2711-TC4 series F
ALLEN BRADLEY PanelView 1200 2711-TC4 series F
Allen Bradley Panelview 1200 2711-KC1 Revision D WARRANTY
Allen Bradley Panelview 1200 2711-KC1 Revision D WARRANTY
Allen Bradley Panelview 1200 2711-KC1X Series F WARRANTY
Allen Bradley Panelview 1200 2711-KC1X Series F WARRANTY
Allen Bradley Panelview 1200 2711-KC1X Revision D WARRANTY
Allen Bradley Panelview 1200 2711-KC1X Revision D WARRANTY
Allen Bradley Panelview 1200 2711-KC1 Revision D WARRANTY
ALLEN BRADLEY PANELVIEW 1200 - 2711 TC1
ALLEN BRADLEY PANELVIEW 1200 - 2711 TC1
allen bradley Panelview 1200
Allen Bradley Panelview 1000e Part 2711E-K10C6 Parts
Allen Bradley Panelview 1000e Part 2711E-K10C6 Parts
ALLEN BRADLEY PANELVIEW 1000E 2711E-T10C6
ALLEN BRADLEY PANELVIEW 1000E 2711E-T10C6
ALLEN BRADLEY PANELVIEW 1000E 2711E-T10C6
ALLEN BRADLEY PANELVIEW 1000E 2711E-T10C6
Allen Bradley Panelview 1000e 2711E-K10C6 Ser A REV C FRN 5.14 2711EK10C6
Allen Bradley Panelview 1000e 2711E-K10C6 D 2711EK10C6 D Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 D 2711EK10C6 D Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 C 2711EK10C6 C Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 C 2711EK10C6 C Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 A 2711EK10C6 A Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 A 2711EK10C6 A Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 A 2711EK10C6 A Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 A 2711EK10C6 A Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 A 2711EK10C6 A Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 A 2711EK10C6 A Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 A 2711EK10C6 A Operator Panel
Allen Bradley Panelview 1000e 2711E-K10C6 A 2711EK10C6 A Operator Panel
Allen Bradley Panelview 1000C 2711-T10C15
ALLEN BRADLEY PANELVIEW 1000 OPERATOR INTERFACE PANEL 2711-K10C1 SER. B REV. C
ALLEN BRADLEY PANELVIEW 1000 OPERATOR INTERFACE PANEL 2711-K10C1 SER. B REV. C
ALLEN BRADLEY PANELVIEW 1000 OPERATOR INTERFACE 2711-T10G10X SER. C REV. B
ALLEN BRADLEY PANELVIEW 1000 OPERATOR INTERFACE 2711-T10G10X SER. C REV. B
ALLEN BRADLEY PANELVIEW 1000 OPERATOR INTERFACE 2711-T10C15 SER. D REV. D
ALLEN BRADLEY PANELVIEW 1000 OPERATOR INTERFACE 2711-T10C15 SER. D REV. D
ALLEN BRADLEY PANELVIEW 1000 OPERATOR INTERFACE 2711-T10C15 SER. B REV. B
ALLEN BRADLEY PANELVIEW 1000 OPERATOR INTERFACE 2711-T10C15 SER. B REV. B
ALLEN BRADLEY PANELVIEW 1000 OPERATOR INTERFACE 2711-K10C8 SER. C REV.B
Allen Bradley Panelview 1000 No Reserve
ALLEN BRADLEY PANELVIEW 1000 K10C15X SERIES D 2009 MFG DATE EXCELLENT COND
ALLEN BRADLEY PanelView 1000 CAT: 2711-T10C15 SER: B

ALLEN BRADLEY PANELVIEW 550 OPERATOR INTERFACE DISPLAY PANEL 2711-B5A2 H AS-IS
ALLEN BRADLEY PANELVIEW 550 OPERATOR INTERFACE DISPLAY PANEL 2711-B5A2 H AS-IS
ALLEN BRADLEY PANELVIEW 550 OPERATOR INTERFACE 2711-K5A1 SER. E PARTS/REPAIR
ALLEN BRADLEY PANELVIEW 550 OPERATOR INTERFACE 2711-K5A1 SER. E PARTS/REPAIR
ALLEN BRADLEY PANELVIEW 550 OPERATOR INTERFACE 2711-B5A1 SER. F PARTS/REPAIR
ALLEN BRADLEY PANELVIEW 550 OPERATOR INTERFACE 2711-B5A1 SER. F PARTS/REPAIR
ALLEN BRADLEY PANELVIEW 550 OPERATOR INTERFACE 2711-B5A1 SER. E PARTS/REPAIR
ALLEN BRADLEY PANELVIEW 550 OPERATOR INTERFACE 2711-B5A1 SER. E PARTS/REPAIR
ALLEN BRADLEY PANELVIEW 550 MODEL 85-264 VAC 2711-B5A1
ALLEN BRADLEY PANELVIEW 550 MODEL 100-240 VAC 2711-K5A2
Allen Bradley Panelview 550 K5A1 Series B Rev B Frn1.03
ALLEN BRADLEY PANELVIEW 550 INTERFACE 2711-K5A5 Ser. F
ALLEN BRADLEY PANELVIEW 550 INTERFACE 2711-K5A1 Ser. F
ALLEN BRADLEY PANELVIEW 550 INTERFACE 2711-K5A1 Ser. F
ALLEN BRADLEY PANELVIEW 550 INTERFACE 2711-K5A1 2711KA1 Ser. H LATE MODEL
ALLEN BRADLEY PANELVIEW 550 INTERFACE 2711-K5A1 2711KA1 Ser. H LATE MODEL
ALLEN BRADLEY PANELVIEW 550 INTERFACE 2711-K5A1
ALLEN BRADLEY PANELVIEW 550 INTERFACE 2711-K5A1
ALLEN BRADLEY PANELVIEW 550 2711-T5A20L1 2711T5A20L1 NIBS
ALLEN BRADLEY PANELVIEW 550 2711-T5A20L1 2711T5A20L1 NIBS
Allen Bradley Panelview 550 2711-K5A5
Allen Bradley Panelview 550 2711-K5A5
Allen Bradley Panelview 550 2711-K5A5
Allen Bradley Panelview 550 2711-K5A5
Allen Bradley Panelview 550 2711-K5A5
Allen Bradley Panelview 550 2711-K5A1 series E Rev A FRN 2.0Works Nice
Allen Bradley Panelview 550 2711-K5A1 series E Rev A FRN 2.01 Works Nice
Allen Bradley Panelview 550 2711-K5A1 series E Rev A FRN 2.01 Works Nice
Allen Bradley Panelview 550 2711-K5A1 series E Rev A FRN 2.01 Works Nice
ALLEN BRADLEY PANELVIEW 550 2711-K5A1 SER B
ALLEN BRADLEY PANELVIEW 550 2711-K5A1
Allen Bradley PanelView 550 2711-K5A1
Allen Bradley Panelview 550 2711-B5A2
Allen Bradley Panelview 550 2711-B5A2
Allen Bradley Panelview 550 2711 K5A1
Allen Bradley Panelview 550 2711 K5A1
Allen Bradley Panelview 550 2711 K5A1
ALLEN BRADLEY PANELVIEW 550 2711 B5A15 SERIES H 2005 DATE FRN 4.41 TOUCH/BU*NS
Allen Bradley Panelview 500 2711-K5A1 Ser F Frn 3.16
Allen Bradley Panelview 300 Micro 2711-M3A19L1
Allen Bradley Panelview 300 2711-K3A2L1

2711-T6C5L1进口现货