【正文】 y, photovoltaic industry development is very rapid, single power supply pletely unable to meet demand. Therefore, the parallel power supply system of switching power supply is produced. The system is posed of five parts, which are constant current source module, constant pressure source module, single chip microputer system control module, auxiliary power module and display module. The system used in the power supply module is lm2596 module, and rely on it to realize buck, also uses STC12C5A60S2 microcontroller as the control core, with the use of IN282 as an amplifier for 50 times amplification signal acquisition. In the parator, the choice is LM358, and the use of the slave flow method to collect the two signals, through the software algorithm to achieve distribution errors, in order to automatically adjust the current power module. In this system, the use of LCD1602 display to show the data collected. Finally, an over current protection circuit is set up in the system. Once the current of the load exceeds the set value, it will automatically start the interrupt and resume after a period of time. After testing, the design has pleted the requirements of the design task, the realization of the distribution of the two module current. Keywords: switching power supply, parallel power supply, single chip microputer 中北大學(xué) 2021 屆畢業(yè)設(shè)計 說明書 第 I 頁 共 II 頁 目 錄 1 緒論 ...................................................................................................................................... 1 選題的目的及意義 .......................................................................................................... 1 國內(nèi)外研究現(xiàn)狀 .............................................................................................................. 2 國內(nèi)外現(xiàn)狀簡介 .......................................................................................................... 2 改進的常用均流控制法 .............................................................................................. 3 新型的均流控制法 ...................................................................................................... 3 分布式電源系統(tǒng)的發(fā)展 .................................................................................................. 5 設(shè)計任務(wù) .......................................................................................................................... 6 2 整體方案設(shè)計 ...................................................................................................................... 7 設(shè)計思路 .......................................................................................................................... 7 方案選擇 .......................................................................................................................... 8 恒壓源與恒流源模塊的設(shè)計方案選擇 ...................................................................... 8 分流方案選擇 .............................................................................................................. 8 過流保護方案選擇 ...................................................................................................... 9 輔助電源電路方案的選擇 ........................................................................................ 10 3 硬件電路設(shè)計 .....................................................................................................................11 恒壓源與恒流源模塊的設(shè)計 .........................................................................................11 恒流源模塊 .................................................................................................................11 恒壓源模塊 ................................................................................................................ 13 單片機系統(tǒng)控制模塊的設(shè)計 ........................................................................................ 14 顯示模塊的設(shè)計 ............................................................................................................ 14 輔助電源模塊的設(shè)計 .................................................................................................... 15 4 系統(tǒng)軟件設(shè)計 .................................................................................................................... 17 Keil C51 集成開發(fā)環(huán)境的介紹 ................................................................................... 17 Keil C51 集成開發(fā) 平臺的介紹 ............................................................................... 17 并口下載軟件的使用 ................................................................................................ 17 程序流程圖 .................................................................................................................... 18 中北大學(xué) 2021 屆畢業(yè)設(shè)計 說明書 第 II 頁 共 II 頁 5 系統(tǒng)測試 ............................................................................................................................ 20 測試儀器 ........................................................................................................................ 20 測試結(jié)果 ........................................................................................................................ 20 附錄 A 開關(guān)電源并聯(lián)供電系統(tǒng)原理圖 ............................................................................... 21 附錄 B 開關(guān)電源并聯(lián)供電系統(tǒng)相關(guān)程序 ........................................................................... 24 參考文獻 .................................................................................................................................. 34 致謝 .......................................................................................................................................... 35 中北大學(xué) 2021 屆畢業(yè)設(shè)計 說明書 第 1 頁 共 35 頁 1 緒論 選題的 目的 及 意義 隨著電力電子技術(shù)的迅速發(fā)展，電源技術(shù)被廣泛應(yīng)用于工業(yè)儀器儀表、計算機、航天、軍事等各個領(lǐng)域，同時也滲透進了國民經(jīng)濟的各行各業(yè)，影響到了我們生活中的各個角落 [1]。最后，在系統(tǒng)中 設(shè)置了過流保護電路，一旦負載的電流超過了 設(shè)定的值，將會自動 啟動 中斷，并在一段時間后恢復(fù)。在比較器上， 選