WS-C3560-48PS-S

WS-C3560-48PS-S

WS-C3560-48PS-S

WS-C3560-48PS-S

外圆磨床的主砂轮电动机起动电路多采用星—三角转换起动电路。用变频器取代原有电路，利用原有接触器的常开触点控制变频器《联系人；欧先生》
《座机：0592-5709825》
《传真：0592-5917519》
《24小时热线：18030229053微信同步》
《QQ  ：2479261344》
《QQ邮箱：2479261344@qq》
的运行，考虑砂轮启动的惯性，变频器软启动时间设定为10S，停止刹车时间设定为15S，根据不同类型的砂轮启动力矩可在50%--80% 之间调节设定。系统速度通过外接可调电位器调节频率，根据工件直径不同的适应速度调整，因受电动机高速时的机械强度/ 噪音/ 振动等因素的限制，电动机 频率设定为60HZ；因低速时电动机散热效果差，考虑工件旋转的变速因素和实际 大加工工件尺寸， 频率设定为35HZ，基准频设定为50HZ。

由前面的负载特性分析可知，高速段为恒功率性质，低速段为恒转矩性质，且低转速时负载要求转矩大，过载能力强。对电动机基准频以上，为保证电动机不过压，采用恒压变频调速。

由电动机理论可知，当电压不变，频率增大时，电动机每极下的磁通随着频率的增大而减小；当电动机电流为额定电流时， 大允许输出转矩减小，容许输出功率不变，属恒功率调速，适用于恒功率负载。基频以下，为保证电动机每极下磁通不变，采用V/F= 常数的变压变频调速，当电动机的电流为额定电流时，电动机容许输出转矩不变，属于恒转矩调速，适用于恒转矩负载。但当速度较低时因电动机内阻不可忽略，若仍保持V/F 为常数，则电动机转矩将减小，无法满足低速时负载要求的转矩大，过载能力强的性能，因此采用变频器的转矩自动补偿功能，选择补偿后的V/F 曲线加以修正。

Electroglas EG5 / 300 ARGOS Wafer Prober (Reduced!)

Tenney / Lunaire T-Series Environmental Chamber

TA Instruments TMA2940 Thermomechanica?l Analyzer

Tektronix DTG5274 Data Time Generator w/ Modules

Rohde & Schwarz UPL16 Audio Analyzer (Reduced)
Rohde & Schwarz UPL16 w/ Options & essories

Lindgren ETS Series 81 RF Shielded Room 9' x 7' x 8'

Thermotron S-32C Environmental Chamber

HP Agilent 35670A Dynamic Signal Analyzer w/ opt's

Bio-Rad FTS 45 FT-IR Spectrometer w/UMA 300A FTIR

Alzmetall AB3R Drilling Machine

Perkin Elmer Autosystem Gas Chromatograph

Mattson Polaris IR-10410 FTIR Spectrometer (Reduced!)

Alloyd 2SC1016 Dual Shuttle Sealer, 10 x 16!

Bio Rad UMA-500 Spectroscopic Microscope, 15x & 4x

TelsonicP3000 Ultrasonic Welding System

Metrum MET64SCUA 8000 Speed (Reduced!)

HP E4433B opt's 1E5/UND/UN4/UN5?/UN7

Rohde & Schwarz FSEB20 Spectrum Analyzer 

Agilent 70420A Phase Noise Test Set w/ opt 001

GLSI Hg253 Portable Vapor Mercury Analyzer

Caliper Life Science Tekmar Autotrace SPE Workstation

HP 89441A Vector Signal Analyzer AYA / AYB / AY9 / UFG

LMI SE2050 Laser Engraver (Reduced!)

SSEC Evergreen M10 Wafer & Mask Cleaner 
Includes Manual, Soare & Ammonia Cab

Agilent 35670A opts AY2/1D0/1D1/1D2?/1D3/1D4/1C2

Kester KWB-1000 Automated Wetting Balance Tester

Mob etio 2189 Lot of 1000, All New (Reduced)
Each Brand New Cell Phone isplete with essories

Wandel & Goltermann OSA-155 DWDM System Analyzer

HP Agilent 83621A Synthesized Signal Generator

DynaMyte 4000 Milling Machine 

Mech-El Intries 709 Manual Eutectic Die Attacher

HP/Agilent E9850A VXI Embedded PC Controller

HP Agilent 5373A Domain Pulse Analyzer (Reduced!)

Tektronix PB200 Packet / Cell BERT Tester (Reduced!)

Nicolet Model 730 FTIR Spectrometer with AEM Module

Wavetek 4808 Multifunction Calibrator

DRZ PP1-P 

Hardinge DV-59 / DSM-59 Intrial Lathe

3M-Matic 700r Random Case Sealer, 15 boxes per min!

Zero Products BNP65-600R&DC Media Blaster w/ Filter

Blue M IGF-7780F Environmental Oven 1100°F

Heller 1148 IRC Reflow Convection Oven

Rohde & Schwarz CMD55 Test Set w/ opt's and manuals

Applied Systems Eng.167KU 300 WattT (Reduced!)

Despatch LFD2-24-3 Forced Air Oven

GSI ScanArray 3000 Microarray Scanner

Azco FG160 SUR-PAK Precision Cutting Machine

Empire Pro-Finish FS-2636 3 Piece System!

HP 83420A opts 014 / 210 (Reduced!)

HP Agilent 866 Signal Generator 100KHz - 4.2GHz

Agilent 8509B Ligave Polarization Analyzer

HP 3566 opts 1C1/1C2/1D0/1D2?/ANA

Amtech Ultraweld 20 Precision Ultrasonic Welder

Coherent Innova 90-6 with LaserPure 20N & Power Supply

Tektronix GB1400 Analyzer/Genera?tor Test Set (Reduced)

Coulter Delsa 440 Particle Counter w/ Power Supply

Tektronix PQA300 Picture Quality Analysis System 

Perkin Elmer ABI Prism 7700 Sequence Detector

Cling Colchester 11" Lathe w/ essories

Lydall Affinity CBD-007S-BB09C-?BD3 Chiller

Unadyn UDC-55 Mini Dryer with 300 Modular Hopper

Bruel & Kjaer 4602B w/ 4185 & essories (Reduced)

Microtrac FRA 9250 Particle Size Analyzer

Cumberland 284 Pelletizer, Granulator

Graco Air Powered Pump with Drum

Blue M Lindberg WSP-109C-MP3 Shock Chamber (Reduced!)

Mitutoyo PH-350A Opticalparator

Metrum MET64SCUAO 4000 Speed (Reduced!)

Blue M 1004-8C-MP3 Environmental Test Chamber

Perkin Elmer Arnel Autosampler

Solitec Edwards High Vacuum Pump System

HP 8510C opt 010 50 GHzwork Analyzer (Reduced!)