基于80c51單片機(jī)的漏電保護(hù)裝置設(shè)計(jì)-文庫吧在線文庫
【正文】 字開頭的年齡已經(jīng)到了尾聲。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強(qiáng)心劑，或者說，是自以為是的精神寄托罷了。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jumpWhen he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely.If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。 Have declared the end of the encounter that haven39。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè)人的時(shí)候，自己的想法總是特別地清晰。The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。s 21 win.Michel Platini, president of European football39。Employment tribunals.The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。Further help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a you don39。：表3 負(fù)載調(diào)整率測試輸出電流（A）111輸出電壓（V)5負(fù)載調(diào)整率： （）/5*100%=%。 圖6 采樣電路的設(shè)計(jì) 漏電檢測電路設(shè)計(jì)圖7 30mA漏電檢測電路 關(guān)斷保護(hù)電路的設(shè)計(jì)51單片機(jī)控制繼電器驅(qū)動(dòng)原理：當(dāng)51單片機(jī)引腳輸出低電平時(shí)，三極管2N3906飽和導(dǎo)通，＋5V電源加到繼電器線圈兩端，繼電器吸合，同時(shí)狀態(tài)指示的發(fā)光二極管也點(diǎn)亮，繼電器的常開觸點(diǎn)閉合，相當(dāng)于開關(guān)閉合?？紤]到可行性，綜合比較之后：選擇方案二。方案二：通過單片機(jī)I/O口控制，驅(qū)動(dòng)電磁繼電器。價(jià)格便宜、對電路影響可忽略不計(jì)、其阻值低、精度高、溫度系數(shù)低、具有無電感、高過載能力。電流漏電檢測電路實(shí)現(xiàn)對三相交流電電壓、電流和漏電的檢測，以實(shí)現(xiàn)對過壓、欠壓、過流和漏電的保護(hù)。缺點(diǎn)：效率不高。當(dāng)穩(wěn)壓管溫度過高時(shí)，穩(wěn)壓性能將變差，甚至損壞。此芯片價(jià)格比較便宜，但抗干擾能力差。電源部分由及相關(guān)電路組成，為整個(gè)系統(tǒng)正常穩(wěn)定地工作提供穩(wěn)定的電壓。將漏電保護(hù)裝置動(dòng)作后，RL兩端電壓為0V并保持自鎖。電壓調(diào)整率SU≤1%。研究直流穩(wěn)壓電源，就是為了提高電源的使用性能和提高電源的電氣性能。關(guān)鍵字：LDO線性直流穩(wěn)壓、漏電保護(hù)目 錄一、系統(tǒng)方案設(shè)計(jì) 1 設(shè)計(jì)要求 1 總體方案設(shè)計(jì) 1 總體電路圖設(shè)計(jì) 2 3 主控芯片單片機(jī)（MCU）的設(shè)計(jì)方案論證與選擇 3 穩(wěn)壓電源的設(shè)計(jì) 3
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