【正文】 設計電路圖與硬件電路進行對照分析發(fā)現(xiàn)基本RS觸發(fā)器的輸入端斷路，導致觸發(fā)器輸出狀態(tài)不定。然而，電冰箱的驅動電機在一定的電壓范圍內才能正常工作，供電電壓過高或過低很容易導致繞組線圈燒毀。為此，我們利用變壓器，再配以控制電路設計了一種自動穩(wěn)壓、自動延時的電冰箱保護器，該多功能電冰箱保護器能夠根據負載電流判斷線路中的各種故障并及時進行保護，最大限度的降低對人們日常生活的影響，是一種經濟實用的電冰箱保護器。通過三個月的努力，我按要求完成了畢業(yè)設計的任務，它使我掌握了設計一個電路的基本方法和基本步驟，增強了在實際設計中尋找問題，解決問題的能力。為了能高效的完成任務，所以在寫論文過程中所遇到的困難及應該怎樣解決的一些問題上面，都是呂老師不惜自己下班的時間通過電話幫我講解的。參考文獻[1] 孫余凱．穩(wěn)壓電源設計與技能實訓教程．電子工業(yè)出版社，2007：4458[2] 楊素行．模擬電子技術基礎簡明教程．高等教育出版社，2007：279424[3] 余孟嘗．數字電子技術基礎簡明教程．高等教育出版社，1999：379420[4] 李清泉、黃昌寧．集成運算放大器原理與應用．北京：科學出版社，1980：55356[5] 周惠潮．常用電子器件及典型應用．西安：電子工業(yè)出版，2007：3789[6] 戴餛．我國電機保護現(xiàn)狀與發(fā)展趨勢．陶瓷研究與職業(yè)教育出版社，2004：5599[7] 沈標正．電機故障診斷技術．機械工業(yè)出版社，1996：2276[8] 柯南．非常電路圖設計．中國鐵道部出版社，2000：56231[9] 潘平中．整流電路．電子制作．2010年7月．196期：65[10] Barry Brants and Mart Williams．用于電源、繼電器和螺線管的協(xié)同式線路保護．世界電子元器件．2010年10月．185期：3334附錄1 譯文自1958年美國德克薩斯儀器公司(TI)發(fā)明集成電路（IC）后，隨著硅平面技術的發(fā)展，二十世紀六十年代先后發(fā)明了雙極型和MOS型兩種重要的集成電路，它標志著由電子管和晶體管制造電子整機的時代發(fā)生了量和質的飛躍。CMOS電路的單門靜態(tài)功耗在毫微瓦（nw）數量級。 集成電路中詳細信息： 1．TTL電平： 　　輸出高電平,輸出低電平。而且具有很寬的噪聲容限。 5．TTL和CMOS電路比較： 　　1）TTL電路是電流控制器件，而CMOS電路是電壓控制器件。3）CMOS電路的鎖定效應附錄2 英文參考資料Since 1958 the United States Texas Instrument Company ( TI ) invented the integrated circuit ( IC ), with the silicon plane technique development, nineteen sixties has invented a bipolar type and MOS type two important integrated circuit, it is marked by a tube or a transistor manufacturing electronic times of occurrence of the quantitative and qualitative leap.MOS is: metal oxide semiconductor ( MetalOxideSemiconductor ) transistor structure referred to as the MOS transistor, a P type MOS and type N MOS pipe branch. By MOS pipe integrated circuit called a MOS integrated circuit, and the PMOS pipes and NMOS pipes together constitute a plementary MOS integrated circuit is CMOSIC ( Complementary MOS Integrated Circuit ).The current digital integrated circuit conductive types can be divided into bipolar integrated circuit ( mainly TTL ) and bipolar integrated circuit ( CMOS, NMOS, PMOS etc.). CMOS circuit with static power dissipation in the NW ( NW ) orders of magnitude.Development of CMOS than TTL late, but with its high superiority in many occasions gradually replaced the TTL.The parison of performance between, everyone will know the reason. is a field effect transistor, TTL bipolar transistor. logic level range is relatively large ( 5 ~ 15V ), TTL can only work on the 5V level is relatively large, strong antiinterference, TTL is relatively small, poor capacity of resisting disturbance with small power consumption, high power consumption ( TTL 1 ~ 5mA / door )The working frequency of is TTL slightly low, but high speed CMOS speed and TTL almost.Integrated circuit in detail: level:High level output , output low level. At room temperature, the general high level output voltage is , output low level. The minimum input high level and low level: high level input = , low level input = , noise margin is . level:Logic level voltage to a power supply voltage, a 0 logic level close to 0V. And has very wide noise margin.3 level conversion circuit:Because TTL and CMOS level values are not the same ( TTL 5V = = CMOS ) are connected to each other, so need level conversion: is to use two resistance to the level of tension, no advanced things.The 4 driving circuitOC doors, which open collector gate circuit, OD doors, which open drain gate circuit, must be external pull up resistor and the power supply can be used as a high level switch level. Otherwise it is generally just as switch high voltage and large current load, so they called the driving gate circuit. and CMOS circuit parison:1) TTL circuit is a current controlling device, and the CMOS circuit is a voltage control device.2) TTL circuit transmission speed, short delay time ( 510ns ), but the large power consumption.CMOS circuit speed slow, long transmission delay time ( 2550ns ), but the low power consumption. CMOS circuit consumption itself and the input signal pulse frequency, the higher the frequency, the more heat the chip set, which is a normal phenomenon.3) CMOS circuit locking effect.附錄 3 整機電路原理圖附錄 4 元器件表序號名稱代號規(guī)格型號數量1電阻、Ⅱ22電阻、Ⅱ23電阻、Ⅱ34電阻、Ⅱ25電阻、Ⅱ26電阻Ⅱ17電阻Ⅱ18電阻Ⅱ19電阻Ⅱ110電位器Ⅱ111電位器Ⅱ112電位器Ⅱ113電容、CD1150V47uFⅡ214電容、CD1150V10uFⅡ315電容CD1150V1uFⅡ116電容CD1125V33uFⅡ117電容CD1116V100uFⅡ118電容CD1116V1uFⅡ119電容CD1116V47uFⅡ120電容CD1125V47uFⅡ121電容Ⅱ122電容Ⅱ123二極管、IN4148224穩(wěn)壓二極管2CW59125三極管、3DG6B226三極管C8050127與非門、CD4011228集成芯片NE555129集成芯片CW7824130繼電器KJQW13F24Ⅱ131整流硅橋KBP210AC220V/DC27V132電源變壓器TAC220V/AC24V3W1