MPL-A4540C-SJ74AA

MPL-A4540C-SJ74AA

当普通异步电动机使用变频器供电时，它会使电磁。机械。由通风和其他因素引起的振动和噪声变化更为复杂。变频电源中包含的每次时间谐波与电机电磁部分的固有空间谐波相互干扰，形成各种电磁冲击力。当电磁波的频率与电机体的固有振动频率一致或接近时，会产生共振现象，从而增加噪声。由于电机工作频率范围广，速度变化范围大，各种电磁波的频率难以避免电机各部件的固有振动频率。

　　由于电机使用变频器电源，电机可以在非常低的频率和电压下以无冲击电流的方式启动，并且可以使用变频器提供的各种制动方式进行快速制动，从而为实现频繁启动和制动创造条件。因此，电机的机械系统和电磁系统处于循环交替力的作用下，给机械结构和绝缘结构带来疲劳，加速老化。

MPL-A4540C-SJ74AA

Lot of 12 Wartsila spare parts PRESSURE SLEEVE D=12*68

NetApp X3145A 111-00022 NVRAM-V NVRAM5 Refurbished

NUOVA 1 axis Controller PRG911 TIPO e40v-50-8 encoder

Lot 5 SJM Flexible Tubes for P32E E22010A9504000 $100/p

Motorola MC2000 FR6074 Phone Barcode Scanner DVT ES Ver

ERICSSON RFS-06004 IND2040842/2 TX RX

STG-1 Rotor Blade for 80C2 High Pressure Turbine AsIs

 EUCHNER TZ1RE024RC18VAB Safety Switch 093863

Nortel NTPN31AG 25A Breaker Module ASTEC AP6C69PAL

NEON RX DS3 V9521416 Telecom Adapter ASI Output Cisco

Lot 520 Pass&Seymour KS58AB-BK Legrand T568A/B Wiring

PARKER AR-04PE ARIES EPL 400W DRIVE Motion Controller

EXCEL 1032B Precision Signal Processor Card Used Spare

Ferraz Shawmut PC123UC20C500TF X220659 2000V 500A FUSE

TELESTE STACCATO DVB ATM PROCESSOR STAC1 Ver B 1.0 

Lot 990pcs KEMET 0.68uF 250vDC N75IN3680ZA00M Capcitors

Applied Material arc control dsp 9090-00419

 EUCHNER Safety Switch TZ1LE024RC18VAB 093862

lot of 1600 SAMTEC 62549-01-S Connetors $0.3/pc

Harmonic Drive Robot part HDC-3C-086-2A 1020592086K Set

Agilent ZORBAX RX-SIL Analytical 880975-901 4.6*250 

Lot 3 Honeywell DG 9251325 9251316 9250908 PressureTran

Danfoss MBT 5111-1101-0315-111 Temp Sensor

rosenberg N60-40000 DKHR-400-4SP.106.5HA-001 blower

YASKAWA SGDH-08AE-S servo drive 200V 750W 0.75KW

Agilent 220-1171E 220-1171U ADM2000 Flowmeter 

COOPER CEAG ZB-S ZB96 40071346555 Ladeteil.1 

Wartsila temp transmitter T501001 PN:0050L290507

SAM ELECTRONICS HS09 Interconnection Board GE3044G206

 EUCHNER Safety Switch TX1B-A024SEM4AS1 094403

used QUANTUMDATA 608 HDTV Video Test Generator

 EUCHNER CES-A-ABA-01 CES Evaluation Unit 071850

BW UR-S600-220VAC W/P Charger 108273

BW CR-4000 PCB Mainboard CR-4000-PCB 114879 

PowerDAQ PD2-AO-16/16 analog output board Used Spare

Raytheon TILLER NFU Remote steering 77433 BLAU

STW SENSOR ESX2-4 ESX control unit 

Tellabs 4112172 HDC6 LF02TY0EAA Rev AA DSL SYNC CARD

MSC cPCI Computer Card 1.4GHZ 512MB 105495-50 

AD-8118A JOURNAL PRINTER USED SPARE

LIST-MAGNETIK Magnetic Fieldmeter MPU-ST Coating Thick

10X Zeiss Microscope len OPTON Planapo 10/0.32 

Agilent 19091-68506 HFM-570 Flowmeter SS Body InBox

Future Life CNC OPERATION PANEL KPV-001 

MONITOUCH V710CD-038 HAKKO Touch Panel HMI Sold As Is

rosenberg N60-35500 DKHR-355-4SP.097.5FA-001 blower

GEARSHAFT SPUR for 80C2-D1F Gearbox Sold As Is

SAM ELECTRONICS AS10 Power Supply NG3028G202 

Lot 200 pcs CONCRAFT Mini PCI Sockets 9.2 0510A0BA92B

Ericsson ROF 137 7856/3-R1H TSW ROF1377856/3-R1H board

Altistart 48 HMI module from ATS48C25Q

TELEMECANIQUE LC1F225 3 POLE AC Contactor 400V 225A 

Endress+Hauser Cerabar M PMC41-RE12P1J11M1 943345-9000

 EUCHNER Safety Switch CES-A-C5E-01 077750

Agilent 220-1170 ADM1000 ADM 1000 Flowmeter 

SIEMENS K-TP178 6AV6 640-0DA11-0AX0 TOUCH PANEL

 DEPUROIL Oil Filter and transfer unit 230V

Agilent 19091S-433I GC Column 30mx0.25mmx0.25um