IC693MDL754 串級調(diào)速是指繞線式電動機(jī)轉(zhuǎn)子回路中串入可調(diào)節(jié)的附加電勢來改變電動機(jī)的轉(zhuǎn)差，達(dá)到調(diào)速的目的。大部分轉(zhuǎn)差功率被串入的附加電勢所吸收，再利用產(chǎn)生附加的裝置，把吸收的轉(zhuǎn)差功率返回電網(wǎng)或轉(zhuǎn)換能量加以利用。根據(jù)轉(zhuǎn)差功率吸收利用方式，串級調(diào)速可分為電機(jī)串級調(diào)速、機(jī)械串級調(diào)速及晶閘管串級調(diào)速形式，多采用晶閘管串級調(diào)速，其特點(diǎn)為：

可將調(diào)速過程中的轉(zhuǎn)差損耗回饋到電網(wǎng)或生產(chǎn)機(jī)械上，效率較高； 裝置容量與調(diào)速范圍成正比，投資省，適用于調(diào)速范圍在額定轉(zhuǎn)速70％－90％的生產(chǎn)機(jī)械上；調(diào)速裝置故障時(shí)可以切換至全速運(yùn)行，避免停產(chǎn)；晶閘管串級調(diào)速功率因數(shù)偏低，諧波影響較大。本方法適合于風(fēng)機(jī)、水泵及軋鋼機(jī)、礦井提升機(jī)、擠壓機(jī)上使用。

四、 繞線式電動機(jī)轉(zhuǎn)子串電阻調(diào)速方法：

繞線式異步電動機(jī)轉(zhuǎn)子串入附加電阻，使電動機(jī)的轉(zhuǎn)差率加大，電動機(jī)在較低的轉(zhuǎn)速下運(yùn)行。串入的電阻越大，電動機(jī)的轉(zhuǎn)速越低。此方法設(shè)備簡單，控制方便，但轉(zhuǎn)差功率以發(fā)熱的形式消耗在電阻上。屬有級調(diào)速，機(jī)械特性較軟。

IC693MDL754 

IC693MDL754 

Nikon NSR-S202A Camera Switcher NVC8-EX-XB

RADVISION L2W-323V Conferecing Unit L2W-323

ORBOTECH SCHUH MOTOR CONTROLLER CARD V2.0

TELEDATA RCPU 11/00 MODULE

KONTRON CTM80-2 REAR I/O T6701AC FOR DT64/CP6010/CP6000

LIGHTSAND SAN COMMUNICATIONS S-155 BOARD 200-00002-01

NUDAM ND-6013 RTD INPUT MODULE 3 CHANNEL

RADVISION MCU-323/20 Conferecing Unit MCU-323

DATAKINETICS DSC100 SERIES MODEL - DSC110A/02

Yamatake Honeywell SDC40 SDC40J C40J8V0AS050D0

KOLLMORGEN ERH-26 200 WATTS REGEN RESISTOR

10 PICOLIGHT PL-XSL-SC-LF3-11 SINGLE MODE TRANSCEIVERS

CLEMESSY ANALYS EQUIPMENT SML 157-01

KONTRON PEP CP602 CPU BOARD FOR CompactPCI SYSTEM CP600

MATROX Gen/pro 721-0201 GP60/F/64/F/64 

LSI Logic Mylex A170-1-32NB AcceleRAID 170 Ultra160 NEW

TOPWARD ELECTRONICS TMV-360A AC VOLTMETER MINT

DALSA CORECO iMAGING X64-AN QUAD ANALOG FRAME GRABBER

SINO SDS2-2MS DIGITAL READOUTS SDS2MS

TELRAD TLV122AA MODULE

WAVETEK 5820A CROSS-CHANNEL SPECTRUM ANALYZER

LIGHTSAND SAN COMMUNICATIONS BOARD 200-00001-01

ORBOTECH SCHUH I/O CONTROLLER CARD V2.2

GILAT LNB LN-5353-10 KU-BAND PART OF AN-3432-10 NEW

DELTA VFD007L21B AC DRIVE VFD-L SERIES 0.75kW

MOTOROLA MVME 334A VME BOARD 01-W3726B MVME334A

KONTRON PEP CP610 CPU BOARD FOR CompactPCI SYSTEM CP600

TELRAD TLV121AA 120OHM MODULE

Vsecure Technologies NetProtect LG100 Enterprise

IKO LINEAR COMPACT BALL SPLINE LSAGF 25 C1 R300 T1 S2 

ROHDE & SCHWARZ TV DATA DISTORTION METER 347.3515.03

GILAT KU-BAND ODU TRANSMITTER ANO950KU ANO 950 KU NEW

GENERAL STANDARDS CORP. PMC-SI104-ECI3 BOARD

SONY PCS-P600P MULTI MEDIA TERMINAL PROCESSOR

ROKAR 125840-7001 MILITARY GPS CARRIER

INTEL RAID CONTROLLER SRCU32U 128MB DUAL CHANNEL NEW

RODENSTOCK SCITEX S-3 4.9/67 

Sun Microsystems CP2080-500 Netra CP2080 cPCI Blade