【正文】 multiplied by the value of the Faraday’s states that the voltage across the inductor is proportional to the rate of change with time of the current through the Kirchhoff’s first law states that the algebraic sum of the voltages around a closed loop is 0,or,in any closed loop, sum of the voltage rises must equal the sum of voltage The first law states that in normal opamp circuits we may assume that the voltage difference between the input terminals is zero, that is, U+= second law states that in normal opamp circuits both of the input currents may be assumed to be zero: I+=I電路理論 theory of circuit模擬電子技術(shù)analog electronics technology數(shù)字電子技術(shù)digital electronics technology電力電子技術(shù)power electronics technology電磁場(chǎng)electromagnetic field電機(jī)與拖動(dòng)electric motor and electric drive電力拖動(dòng)自動(dòng)控制系統(tǒng)electric drive automatic control system 自動(dòng)控制理論automatic control theory現(xiàn)代控制理論modern control theory智能控制intelligent control微機(jī)原理principle of microputer計(jì)算機(jī)接口技術(shù)puter interface technology計(jì)算機(jī)控制技術(shù)puter control technology自動(dòng)調(diào)節(jié)裝置automatic regulators過程控制系統(tǒng)process control system過程檢測(cè)及儀表process measurement and instrument單片機(jī)原理與應(yīng)用principle and application of singlechip puter 可編程序控制器系統(tǒng)programmable logical controller system 現(xiàn)場(chǎng)總線技術(shù)fieldbus technology嵌入式系統(tǒng)embedded system供電技術(shù)power supplying technology計(jì)算機(jī)仿真puter simulation信號(hào)分析與處理signal analyzing and processing集散控制系統(tǒng)distributed control system樓宇自動(dòng)化building automation機(jī)器人學(xué)roboticsGTOgate turnoff thyristor門極可關(guān)斷晶閘管 GJTbipolar junction transistor雙極結(jié)型晶體管 SCR第五篇：自動(dòng)化專業(yè)英語(yǔ)03PLC簡(jiǎn)稱為可編程控制器PLC programmable controller for shortPLC開始應(yīng)用于工業(yè)控制是在20世紀(jì)60年代PLC began to application in industrial control is in the 1960sPLC的特點(diǎn)有PLC characteristic編程簡(jiǎn)單，可以現(xiàn)場(chǎng)修改程序，易于掌握Simple programming and can spot modify the program and easy to catch維護(hù)方便Maintenance convenient可靠性高，抗干擾性強(qiáng)High reliability and antiinterference is strong體積小，重量輕，功耗低Small volume, light weight, low power consumption功能強(qiáng)，通用性好Strong function, excellent versatilityPLC可以分為以下幾類PLC can be classified into the following categories整體式PLC和模塊式PLCIntegral PLC and module type PLCPLC的作用PLC role用于開關(guān)邏輯控制，定時(shí)、計(jì)數(shù)控制Switching logic control, timing, counting control用于閉環(huán)過程控制，數(shù)據(jù)處理，數(shù)字控制Used in closed loop of process control, data processing, digital control隨著應(yīng)用領(lǐng)域的日益擴(kuò)大，PLC技術(shù)及其產(chǎn)品仍在繼續(xù)擴(kuò)展As the fields of application, PLC technology and its growing product still continues to expand其機(jī)構(gòu)不斷改進(jìn)，功能日益增強(qiáng)，其性價(jià)比越來越高Its institutions continue to improve, the function, the ratio of growing increasingly highPLC的組成PLC position中央處理單元The central processing unit 存儲(chǔ)器memory輸入、輸出單元Input and output unit 單元電源Unit powerPLC programmable controller for short, Began to application in industrial control is in the characteristic of PLC, Simple programming and can spot modify the program and easy to catch, maintenance reliability and antiinterference is volume, light weight, low power can be classified into the following PLC and module type role, Switching logic control, timing, counting in closed loop of process control, data processing, digital the fields of application, PLC technology and its growing product still continues to institutions continue to improve, the function, the ratio of growing increasingly position, the central processing unit, memory,input and output unit, unit power.