描述
低转速时的冷却问题
首先,异步电动机的阻抗不尽理想,当电源是向电子设备提供功率的装置,也称电源供应器,它提供计算机中所有部件所需要的电能。频率较底时,电源中高次谐波所引起的损耗较大。其次,普通异步电动机再转速降低时,冷却风量与转速的三次方成比例减小,致使电动机的低速冷却状况变坏,温升急剧增加,难以实现恒转矩输出。
主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro(福克斯波罗):I/A Series系统,FBM(现场输入/输出模块)
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
结构的zui现代化的容错控制器。
⑨Siemens(西门子):Siemens MOORE,Siemens Simatic C1,Siemens数控系统等。
⑩Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
◆Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
MILLIPORE CARTRIDGE FILTER WITH 3″TRI CLOVER FITTINGS
WEG GENERATOR SYSTEM 50 KW 200SI12 SEE DESC.MORE INFO
Video Jet Excel 273 SE ink jet marking machine*XLNT*
NIKKISCO METERING PUMP CMCAZ-3.70-68S2ESP(SST)30 CAP
KIKUSUI KSG4110 FM-AM SIGNAL GENERATOR(0.1-110 MHZ)
RELIANCE ELECTRIC GV3000/SE 30 HP.AC DRIVE BRAND NEW
EUROTHERM 620 VECTOR DRIVE 45 kW 60 HP.SEE DESC.NICE
OMLAT SPINDLE CNC SPINDLE DISC.5390 MATR.942502 RECON
ALLEN BRADLEY 8600 INTELLIGENT MOTION CONTROL LOADED
COMPLETE RACK WITH CARDS!!(CNC CONTROLS)
INDRAMAT MDD112C-N-015-N2L-130PB0 SERVO MOTOR(NEW)
YASKAWA VARISPEED 505 SPINDLE DRIVE CDMR-ZII JPDC-C036
ALLEN BRADLEY 6181P-12NP2KH VERSAVIEW 1200P NEW IN BOX
ALLEN BRADLEY 8600 MOTION CONTROL COMPLETE SYSTEM WITH
INTERFACE CONTROL EXTRA NICE CONDITION MANY AVAILABLE!
ALLEN BRADLEY SIZE 5 509-FOD COMBINATION CONTROLLER
YASKAWA USAMED-30MS2TD SERVO MOTOR ENCODER UTMAH-B15BS
BOSCH SE301 TIGHTENING CONTROLLER 0608830160
EMERSON FX-490 POSITIONING SERVO DRIVE(14.0 AMP)240V
EMERSON FX-455 POSITIONING SERVO DRIVE(10.5 AMP)240V
SIEMENS SICOMP PC 32-F(6APAA60-ADV0A)NEW IN BOX
SIEMENS SICOMP PC 32-F(6APAA60-0CV0A)??NEW??
FINCOR 6400 ADJUSTABLE FREQUENCY DRIVE 20 HP.(NEW)
YASKAWA SERVOPACK CACR-TS555Z1SRY9 NEW IN BOX!!
YASKAWA SERVOPACK CACR-TM333Z1SPY8 NEW IN BOX!!
YASKAWA VARISPEED 505 CDMR-WII 230V 45A XLNT CONDITION
INFICON HALOGEN LEAK DETECTOR HLD4000 MODEL 702-500-G1
ALLEN BRADLEY SIZE 5 509FOD 512 COMBINATION CONTROLLER
MITSUBISHI FREQROL FR-AP720-7.5K-01 INVERTER 7.5kW LNC
YASKAWA SERVOPACK CACR-SR44BC1CSY414 GOOD TAKEOUT
HITACHI CDL150XU CONTEC INDUSTRIAL LCD MONITOR 15’NIB
RENISHAW MP10 70 SET PROBE WITH STYLUS NEW OLD STOCK??
FRISTAM CENTRIFUGAL PUMP FP712-115(3 HP)NEW IN BOX!
BOSCH 0608830162 COMMUNICATION UNIT KE300 GOOD TAKEOUT
LDS PAE SERIES POWER AMPLIFIER PA25E CE(NEW IN BOX)
VICKERS FAS T-3-V3-00-00-00 SERVO MOTOR(3000 RPM)NEW!
VICKERS FAS T-3-V3-030-00-00-00 SERVO MOTOR 3000 RPM
INDRAMAT MAC090A-0-RD-4-C/110-B-0/W1515LV SERVO MOTOR
EUROTHERM SERVO DRIVE 635/DER 07-PDP(XLNT CONDITION)
KOLLMORGEN BDS4A-230J-604B2 SERVO DRIVE 30 AMP XLNT
YASKAWA CDMR-ZII VARISPEED 505 SPINDLE DRIVE 25 AMP
SIEMENS SINAMICS 6SL3040-0JA00-0AA0 SERVO DRIVE(CU305)
MULTIMEDIA CARD 64 MB POWER MODULE 340 W/SEE DESC.
LOMA SUPERSCAN METAL DETECTOR MD21-6926(4 X 3)110V