西门子产品6SE6440-2AD31-1CA1

6SE6440-2AD31-1CA1

交流电机和直流电机各有其优缺点，具体如下：

　　交流电机的优点：

　　结构简单、可靠性高：交流电机由于没有电刷，所以结构比较简单，故障率低，易于维修。

　　体积小、重量轻：由于交流电机的结构简单，所以体积小、重量轻。

　　调速范围宽：交流电机可以通过调节电源频率来实现调速，调速范围广。

　　价格相对低廉：由于生产成本低，交流电机的价格相对较低。

　　交流电机的缺点：

　　启动时需要较大的起动电流。

　　电机效率相对较低。

　　可靠性差，对电源的质量要求较高。

AGILENT HP 86030A 8510C 8517B 86032A 83651B 86030-B0011

AGILENT HP 8510C 50GHz VECTOR NETWORK ANALYZER W/ 8517B

AGILENT HP 8720ES 20 GHz S-PARAMETER NETWORK ANALYZER

ENTEGRIS AERONEX INFINITY HYDROGEN PURIFIER GPS-300HP-H

VALERE INTEGRATED DC POWER SYSTEM

SCHLEUNIGER FO 7045 AUTOMATIC FIBER CABLE PROCESSING

AGILENT HP 8720A NETWORK ANALYZER 130 MHz - 20 GHz

HP AGILENT 83752A 20 GHz SYNTHESIZED SWEEPER 71612B

AMPLIFIER RESEARCH 30S1G3 30 W 3GHz BROADBAND AMPLIFIER

POLYTEC OFV-3000 VIBROMETER & OFV-502 FIBER INFEROMETER

AGILENT HP 8753D 6GHz 6 GHz NETWORK ANALYZER 006

AGILENT HP EXFO SANTEC LUCENT DWDM LASER LIGHT SOURCE

COHERENT QUATTRO FAP FIBER ARRAY PACKAGE LASER

HP AGILENT 8702D 6 GHz LIGHTWAVE COMPONENT ANALYZER

ENTEGRIS AERONEX GATEKEEPER GAS PURIFIER SS-2500KF-I-4R

LUCENT PSAX 4500 PACKETSTAR VOIP MEDIA GATEWAY LOADED

INET TEKTRONIX SPECTRA SS7 PROTOCOL ANALYZER SIMULATOR 

INET TEKTRONIX SPECTRA SS7 PROTOCOL ANALYZER SIMULATOR 

AGILENT HP 86100A INFINIIUM DCA OSCILLOSCOPE & 86101A

TEKTRONIX INET GEOPROBE GEO PROBE VOIP TESTING MONITOR

WMF COMBINATION F FILTER COFFEE MACHINE COMBINATIONF

T-TECH QUICKCIRCUIT QUICK CIRCUIT 7000 PCB PROTOTYPE

HARRIS LOUTH ADC-100 64 PORT DEVICE SERVER AUTOMATION

SPIRENT ZARAK ABACUS BULK CALL SIMULATOR GENERATOR

SPIRENT TAS5600 C2K UNIVERSAL INTERFERENCE EMULATOR

AGILENT HP 71603B 3G ERROR PERFORMANCE ANALYZER ~86130A

PACKETSTORM 1800E WAN EMULATION & NETWORK SIMULATION

PHYSIK INSTRUMENTE PI F-206 HEXALIGN 6-AXIS F-206.B0001

RUDOLPH AUTOEL III AUTOMATIC ELLIPSOMETER OPT 2 4C

NETTEST TUNICS-PLUS S TUNABLE LASER EXTERNAL CAVITY

TEKTRONIX INET SPECTRA PORTABLE SS7 ANALYZER TEST SET

SPIRENT ZARAK ABACUS CIRCUIT GENERATOR SWITCH EMULATOR

LUCENT EXCEL EXS-2000 LNX SS7 PROGRAMMABLE SWITCH 80 T1

HP 4291A RF IMPEDANCE MATERIAL ANALYZER OPTION 001

AGILENT HP 70843A 12 GB/S ERROR ANALYZER UHF UHJ

VEECO WYKO NEWPORT FIBER INTERFEROMETER 629.8 nm

HARMONIC HOA 8030-8 VIDEO OPTICAL AMPLIFIER HOA8030

RFPP RF20H WATERCOOLED RF GENERATOR ADVANCED ENERGY

MINERVA 8000 MPEG VIDEO ENCODER CONCENTRATOR

HP AGILENT 70301A MICROWAVE TRACKING GENERATOR 18.0GHZ

W&G TTC ACTERNA JDSU PSM-137 8MHZ SELECTIVE LEVEL METER

T-TECH 5000 HS HIGH SPEED CIRCUIT BOARD PROTOTYPER

ANDO AQ6330 OPTICAL SPECTRUM ANALYZER

POLYTEC OFV-1102 LASER VIBROMETER VIBRATION

AVTECH AV-108B PULSED CONSTANT CURRENT SOURCE

HP AGILENT 86100A INFINIIUM DCA OSCILLOSCOPE

HP AGILENT E4433B ESG-D DIGITAL RF SIGNAL GENERATOR

AVTECH AVO-7D-OPA-OP1B-P LASER DIODE DRIVER AVO-7

SPIRENT CONSULTRONICS DLS 400S ADSL WIRELINE SIMULATOR

AVTECH AVO-7D-C-OPA-OP1B-P LASER DIODE DRIVER AVO-7

AGILENT HP 54845A INFINIIUM OSCILLOSCOPE 4 Chan 1.5 GHz

SPIRENT TAS5200 AIRACCESS C2K-ATS CDMA RF CONVERTER

DIGITAL LIGHTWAVE NAA REMOTE NETWORK ACCESS AGENT

AEROFLEX IFR 1900-5 DIGITAL PCS RADIO TEST SET

ULTRA TEC UT-8812 BENCH-TOP FIBER POLISHER 58812-1

AVTECH AV-106B PULSED CONSTANT CURRENT SOURCE

LEICA WILD M420 MACROSCOPE MICROSCOPE MAKROZOOM

NEWPORT RV240CCHL HIGH TORQUE & LOAD ROTATION STAGE

JDS UNIPHASE SC 4X8 FIBER OPTIC SWITCH

AGILENT HP 86112A DUAL ELECTRICAL 20 GHz FOR 86100A

SPIRENT DLS 6200 TESTWORKS MPS DSL WIRELINE SIMULATOR

SDL SDL-5762-A6 MOPA DIODE LASER 988 NM

JDS UNIPHASE SB 2X48 ST FIBER OPTIC SWITCH

KEITHLEY 2500 DUAL PHOTODIODE METER

TEKTRONIX TDS3054 500 MHz 5 GS/s DPO OSCILLOSCOPE

KEITHLEY 6517A ELECTROMETER HIGH RESISTANCE METER

CTI-CRYOGENICS CRYO-TORR 10 CRYOPUMP HIGH VACUUM PUMP

IMAGEN XR 2001 MARKING & MEASUREMENT SYSTEM MICROSCOPE

SIEMENS 00116113-01 00350588-01 SMT PLACEMENT SLEEVE

THERMO SCIENTIFIC KEYTEK MINIZAP ESD SIMULATOR MZ-15/EC

SPIRENT SR3452 AIRACCESS C2K-ATS CDMA NETWORK EMULATOR

RUCKER & KOLLS 1032 AUTOPROBER STATION CASCADE 54 R&K

NEWPORT 8000 MODULAR LASER DIODE CONTROLLER

NEWPORT 8000 MODULAR LASER DIODE CONTROLLER 8350 8560

ACTERNA TTC JDS CENTEST 650-S WIDEBAND REMOTE TEST UNIT

HP AGILENT 8595E 6.5 GHz SPECTRUM ANALYZER 050 105 -H

AGILENT HP 86062C FIBER LIGHTWAVE SWITCH DUAL 4X3

ROHDE & SCHWARZ ADS DUAL ARBITRARY WAVEFORM GENERATOR

AGILENT HP 70612C K54 MMS STIMULUS RESPONSE MATRIX

TRIOTECH G-488-1-8-H GROSS LEAK PRESSURE SYSTEM G-488

ELGAR SW1750 SMARTWAVE 3 PHASE POWER SUPPLY SW 1750

NIKON SMZ-U STEREOZOOM MICROSCOPE W UW10XA/24 EYEPIECES

HP AGILENT 6812A AC POWER SOURCE ANALYZER 750VA

SPIRENT CONSULTRONICS DLS 400E 2MBIT WIRELINE SIMULATOR

ECHOLAB MVS3-3W NTSC COMPONENT VIDEO SWITCHER & PANEL

TEKTRONIX 80E02 ELECTRICAL SAMPLING MODULE CSA8000

REICHERT INVERTED MICROSCOPE CAMERA SYSTEM & OBJECTIVES

HP AGILENT 83434A 10 GB/S LIGHTWAVE RECEIVER

BUEHLER ECOMET V 5 DUAL 8" 2 SPEED GRINDER / POLISHER

LUCENT NS23N600BA PSAX 1250 2300 CH DS3 MODULE

AUSTIN AMERICAN TECHNOLOGY SS610 SS-610 REWORK STATION

ADVANCED ENERGY 2011-014-01 RF POWER SUPPLY

HYBOND 522A MANUAL BALL BONDER

FLUKE PHILIPS PM 5644 TV COLOR PATTERN GENERATOR 16:9

LUCENT NS23N610BB PSAX 1250 2300 CH DS3 MODULE

REDBACK NETWORKS SMS1800 SYSTEM DS3 OC3 10 100 SMS 1800

SIEMENS 00116114-01 SMT PLACEMENT NOZZLE BALL SLEEVE

NIKON SMZ-U STEREOSCOPIC ZOOM STEREOZOOM MICROSCOPE

NETCOM SPIRENT SMARTBITS SMB-6000B LAN NETWORK ANALYZER

AGILENT HP 8508A VECTOR VOLTMETER 85081B MODULE VOLT

AGILENT HP 8594E 2.9 GHz SPECTRUM ANALYZER 101 105 130

BEDE SCIENTIFIC EDR ENHANCED DYNAMIC RANGE DETECTOR

HP AGILENT 85047A 6 GHz S-PARAMETER TEST SET FOR 8753D

HP AGILENT 8920B RF COMMUNICATION TEST SET LOADED 

HP AGILENT 8920B RF COMMUNICATION TEST SET LOADED -D

AGILENT HP 70612C K51 MMS INTERFACE TEST PORT MUX

ADTECH AX/4000 XL CHASSIS 400140 & 401427 ETHERNET

AEROFLEX IFR 1900 CSA DIGITAL PCS RADIO TEST SET

HP AGILENT 8920B RF COMMUNICATION TEST SET 83206A

AGILENT HP 8920B RF COMMUNICATION TEST SET LOADED C

AGILENT HP 8924C CELL CDMA MOBILE STATION TEST SET

KEITHLEY 2002 DIGITAL MULTIMETER 8.5 DIGITS DMM

AVID XPRESS VIDEO EDITING SYSTEM & ELITE BUNDLE DONGLE

ADVANTEST R3265 100 Hz TO 8 GHz SPECTRUM ANALYZER

NEWPORT 9008 MAINFRAME W 6 8350 TEC MODULES 9000

RIFOCS 702R-19 OPTICAL POWER METER 771R-REM 700R 781RL

HP AGILENT 8920A RF COMMUNICATION TEST SET 102 -C

TEKTRONIX TDS3012B DIGITAL OSCILLOSCOPE TDS3TRG TDS3GV

DRANETZ PP-4300 BMI POWER PLATFORM ANALYSER PP4300

HP AGILENT 8591A 1.8 GHz SPECTRUM ANALYZER 1 11 023 301

DAGE BT22 BT 22 BOND STRENGTH PULL TESTER MICROTESTER

OK INDUSTRIES SMT-880 SOLDERING VACUUM REWORK STATION

SPIRENT DLS-400S V11 ADSL WIRELINE SIMULATOR DLS 400

HP AGILENT 81101A PULSE GENERATOR 10 V 50 MHZ 50 OHM

DATA I/O 3980 DEVICE PROGRAMMER PLCC DIP SOIC TSOP QFP

HP AGILENT 83482A 40 GHZ ELECTRIC 32 GHZ OPTICAL MODULE

ANRITSU MT9810A OPTICAL SYSTEM 1550 NM DFB FP LASER

NIKON SMZ800 STEREO ZOOM MICROSCOPE C-W10X/22 EYEPIECES

UNITEK MIYACHI 1-128-01 CURRENT DISCHARGE SPOT WELDER

LINE TOOL XY LINEAR STAGE WITH SPECTRA PHYSICS 415

RIFOCS TEXTRON TEMPO INGAAS POWER METER SYSTEM 772R

MOLEX OSCD2810 OSCM1837 PNEUMATIC BENCH CRIMPER

DIGIUM AA300 SWITCHVOX APPLIANCE TELEPHONE IP PBX VOIP

CTI-CRYOGENICS CRYO-TORR 8 CRYOPUMP HIGH VACUUM PUMP -B

TEKTRONIX TFP2 FIBERMASTER OTDR WITH OPTIONS 11 16 24

XANTREX XDC80-75 6 KW DC POWER SUPPLY XDC 80-75

ADVANTEST R3465 8 GHz SPECTRUM ANALYZER PDC PHS NADC

ANRITSU MT8801C DIGITAL ANALOG RADIO COMMUNICATION TEST

IXIA 400 MODULAR TEST CHASSIS LOAD TRAFFIC GENERATOR

JDS UNIPHASE SC 2X3 FIBER OPTIC SWITCH E CONFIG FITEL

KEITHLEY 2001 MULTIMETER 71/2 DIGIT AUTORANGING DMM

EDWARDS EOF VACUUM PUMP EXTERNAL OIL FILTER 25CR ! NEW

HP AGILENT 54751A DIGITIZING OSCILLOSCOPE MODULE 54750A

PHOTON INC BEAM SCAN XYLA HP2 LASER MEASUREMENTS

OPTISPEC U-RLA ME3200 INSPECTION MICROSCOPE OLYMPUS

ACTERNA WANDEL W&G PCM-4 PCM4 CHANNEL MEASURING SET

ACTERNA WANDEL W&G PCM-4 PCM4 CHANNEL MEASURING SET

ACTERNA WANDEL W&G PCM-4 PCM4 CHANNEL MEASURING SET

PHOTONIC INTEGRATION AWG-NB-1X40-100G DWDM SYSTEM

SRS DG535 DIGITAL DELAY PULSE GENERATOR 01 DG-535 GPIB

ACTERNA WANDEL W&G PCM-4 PCM4 CHANNEL MEASURING SET

TECHNOPRINT FRITSCH HA 06 CONVECTION REFLOW OVEN SMD

WANDEL & GOLTERMANN WG PCMZ-4 E1 PCM MEASUREMENT SET

CAT PUMPS 2530 TRIPLEX PLUNGER PUMP

NETWORK ASSOCIATES OC3-SMF MODULE FOR ATMBOOK ATM 

CHATILLON TCM 201-MS FORCE TESTER MOTORIZED TCM201-MS

IXIA LM1000GBIC 2-PORT GIGABIT 400/1600 LM-1000GBIC