描述

CC-PCF901

對于采用IPM智能化逆變模塊的變頻器，驅(qū)動供電往往為單電源，并未提供負(fù)壓，又是嘛回事呢？
從設(shè)計上的要求，IGBT驅(qū)動信號的引線越短越好，以降低引線電感效應(yīng)；IGBT的E、E極間應(yīng)有有小的電阻回路，以充分旁路干擾信號電流。而IPM模塊，驅(qū)動電路與逆變主電路都集成于模塊內(nèi)部，驅(qū)動電路與IGBT之間配線極短，據(jù)資料稱，甚至省掉的柵極電阻，以降低配線阻抗。IGBT在關(guān)斷狀態(tài)下，保障柵極處于低阻抗接地狀態(tài)，從而有效防止了由干擾信號造成的誤導(dǎo)通，因而省掉了負(fù)電源供電。

在本系統(tǒng)中，工業(yè)現(xiàn)場控制是核心，而工業(yè)現(xiàn)場控制主要由PLC系統(tǒng)完成，所以如何合理有效地使用PLC技術(shù)就成了設(shè)計的關(guān)鍵。PLC的特點是控制可靠，編程簡單，但程序內(nèi)存不大，不能進(jìn)行復(fù)雜的編程；而石化產(chǎn)品的特點是生產(chǎn)工藝復(fù)雜，產(chǎn)品型號繁多，往往1條生產(chǎn)線就能夠生產(chǎn)幾十種型號的產(chǎn)品。這就形成了一對矛盾。如果設(shè)計時采用常規(guī)的PLC控制系統(tǒng)，那么1條生產(chǎn)線就需要20幾臺PLC基本模塊和A/D轉(zhuǎn)換模塊。投資巨大，而且按照現(xiàn)代控制理論，在1個控制系統(tǒng)中配置的控制模塊越多，控制越不可靠。為了減少投資和增強控制的可靠性，在PLC控制系統(tǒng)的硬件配置上進(jìn)行了多項創(chuàng)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