描述
CC-PCF901
对于采用IPM智能化逆变模块的变频器,驱动供电往往为单电源,并未提供负压,又是嘛回事呢?
从设计上的要求,IGBT驱动信号的引线越短越好,以降低引线电感效应;IGBT的E、E极间应有有小的电阻回路,以充分旁路干扰信号电流。而IPM模块,驱动电路与逆变主电路都集成于模块内部,驱动电路与IGBT之间配线极短,据资料称,甚至省掉的栅极电阻,以降低配线阻抗。IGBT在关断状态下,保障栅极处于低阻抗接地状态,从而有效防止了由干扰信号造成的误导通,因而省掉了负电源供电。
在本系统中,工业现场控制是核心,而工业现场控制主要由PLC系统完成,所以如何合理有效地使用PLC技术就成了设计的关键。PLC的特点是控制可靠,编程简单,但程序内存不大,不能进行复杂的编程;而石化产品的特点是生产工艺复杂,产品型号繁多,往往1条生产线就能够生产几十种型号的产品。这就形成了一对矛盾。如果设计时采用常规的PLC控制系统,那么1条生产线就需要20几台PLC基本模块和A/D转换模块。投资巨大,而且按照现代控制理论,在1个控制系统中配置的控制模块越多,控制越不可靠。为了减少投资和增强控制的可靠性,在PLC控制系统的硬件配置上进行了多项创新。
C61589 Varian G-292 Rotating Anode X-Ray Tube in B-130H
G52749 SSE Corp. M20 Wet Process Wafer Cleaning System
G54937 Alcatel IPUP A100L Dry Vacuum Pump
G54939 Alcatel IPUP A100L Dry Vacuum Pump
G71680 Valhalla Scientific D6100 Spectral Pwr. Analyzer
G54942 Alcatel IPUP A100L Dry Vacuum Pump
C54282 Hot Cold Temp Vacuum Wafer Chuck 11″ Stage
G72623 Brinkman Metrohm 701 KF Titrino & 703 Ti Stand
C67233 Adept Robot Module 90400-04318 / XY-P177S180-1
A72721 Beckman Allegra 6R Refrigerated Centrifuge
L72707 Agilent VXI E1439C 95MSa/s Digitizer DSP Opt.001
C56452 Tektronix TLA715 Logic Analyzer (Calibrated 2010
G71828 DeHaart MPC 24/29 Screen Printer
L70516 Varian DS 102 Dual Stage Rotary Vane Vacuum Pump
A69922 Lot of (2) EPE Computer Power Center PowerPacs
C51252 Tektronix TLA715 Logic Analyzer (Calibrated 2010
CC44406 MRL 14TC-45 Conveyer Furnace / Reflow Oven
AC44258 Prometrix Spectromap Film Wafer System SM200/e
C69221 Wentworth FIX-R-1-E Probe Card Repair Station
A34721 Thermotron Environmental Chamber, 460/3/60
A68882 Lindberg/Blue M STF55666C Solid Tube Furnace
C67797 R&K Rucker Kolls 300 Probe Card Building Station
C53849 Precision Measurement Microscope Sys w/X-Y Stage
C55172 Tektronix TLA715 Logic Analyzer
K67775 Kulicke & Soffa 6490 Semi-Auto DieBonder
N60611 2 Forma Scientific 3250 Water Jacketed Incubator
K71127 PRI Equipe ATM Wafer Robot & ESC-100 Controller
K71478 LOT 2 PRI/Equipe ATM Wafer Loading Robot Arm
A72337 PE Applied Biosystems GeneAmp PCR System 9700
C72662 Powervar GPI 3-Phase Power Conditioner 125kVA
C72667 MECS UTX-1000 Wafer Robot & CS-1000 Controller