【導(dǎo)讀】電子負(fù)載的原理是控制內(nèi)功率MOSFET或晶體管的導(dǎo)通量靠功率管的耗散功。率消耗電能的設(shè)備負(fù)控制環(huán)路控制環(huán)路電路的核心實(shí)質(zhì)在這里既作為電流的控。制器件同時(shí)也作為被測電源的負(fù)載從而達(dá)到電子負(fù)載的恒流控制ABSTRACT. 第一章電子負(fù)載系統(tǒng)設(shè)計(jì)方案2. 12系統(tǒng)設(shè)計(jì)要求3. 22顯示模塊的設(shè)計(jì)7. 25采樣電路模塊11. 26電流取樣PI控制器等組成的負(fù)反饋控制模塊14. 附錄二電子負(fù)載設(shè)計(jì)程序31. 以及購買電池電源時(shí)等都需要負(fù)載測試當(dāng)前國內(nèi)外對(duì)上述產(chǎn)品的試驗(yàn)一般都采。負(fù)載的需求越來越多對(duì)其性能要求也越來越高電子負(fù)載可以模擬真實(shí)環(huán)境中的。的電源廠家都會(huì)有用而且也必須有電子負(fù)載分為直流電子負(fù)載和交流電子負(fù)載。由于電子負(fù)載的應(yīng)用問題本文主要介紹直流電子負(fù)載。11電子負(fù)載工作原理。壓源及ADDC電源的負(fù)載調(diào)整率負(fù)載調(diào)整率是電源在負(fù)載變動(dòng)情況下能夠提供穩(wěn)。此種狀態(tài)下負(fù)載如純電阻吸收與電壓成線性正比的電流此方式適用于測試。電壓源電流源的啟動(dòng)與限流特性。在定電壓方式下電子負(fù)載將吸收足夠的電

　　

【正文】 電流顯示 power else 非小數(shù)無效重新輸入 flag 0 flag1 0 flag2 0 writeshuzi 020 writeshuzi 1211 writeshuzi 2211 writeshuzi 3211 writeshuzi 4211 if flag 5 掃描第六位輸入 readkey5 keyscan if readkey5 15 未確認(rèn) if readkey5 11 清零重新輸入 flag 0 flag1 0 flag2 0 writeshuzi 020 writeshuzi 1211 writeshuzi 2211 writeshuzi 3211 writeshuzi 4211 else 確認(rèn)輸入 if flag1flag2 1 第三位小數(shù)輸入 x readkey10readkey2readkey301readkey4001 flag 6 flag3 1 writehanzi 005 顯示測得電壓電流 writehanzi 202 writehanzi 025 writehanzi 221 writehanzi 046 writehanzi 247 out x025 value 1024out40 dianl x110 tlc5615 value1 恒流基準(zhǔn)電壓輸出 adzh 電壓顯示 adzh_1 電流顯示 power else 非小數(shù)輸入無效重新輸入 flag 0 flag1 0 writeshuzi 020 writeshuzi 1211 writeshuzi 2211 writeshuzi 3211 writeshuzi 4211 if flag 6 確認(rèn)輸入后的處理 readkey6 keyscan 重新再次輸入 if readkey6 11 flag 0 flag1 0 flag2 0 flag3 0 x 0 DA 輸出清零 writeshuzi 020 清零后顯示 writeshuzi 1211 writeshuzi 2211 writeshuzi 3211 writeshuzi 4211 writeshuzi 0411 writeshuzi 1411 writeshuzi 2411 writeshuzi 3411 writeshuzi 4411 writeshuzi 5211 writeshuzi 5411 adzh 電壓顯示 adzh_1 電流顯示 power 掃描法判鍵子程序 include keysh uchar keycode uchar scancode 0keyvalue delay 120 延時(shí)去抖 scancode P0 掃描法查鍵值 switch scancode case 0x7e keyvalue 3 break case 0xbe keyvalue 2 break case 0xee keyvalue 0 break case 0xde keyvalue 1 break case 0x7d keyvalue 7 break case 0xbd keyvalue 6 break case 0xed keyvalue 4 break case 0xdd keyvalue 5 break case 0x7b keyvalue 11 break case 0xbb keyvalue 10 break case 0xeb keyvalue 8break case 0xdb keyvalue 9break case 0xd7 keyvalue 12break case 0xb7 keyvalue 14break case 0x77 keyvalue 15break default return NOKEY return keyvalue uchar keyscan uchar keyval P0 0xfe keyval keycode if keyval NOKEY P0 0xfd keyval keycode if keyval NOKEY P0 0xfb keyval keycode if keyval NOKEY P0 0xf7 keyval keycode if keyval NOKEY return NOKEY return keyval DA 轉(zhuǎn)換子程序 include tlc5614h include spih void tlc5615 uint da 10 位 DA 掃描子程序 da 2 scs 0 spiwrite da 8 調(diào)用 spi 串行通信 spiwrite da scs 1 spi 串行口通信子程序 include spih include mh include reg51h define trytime 200 define DELAY_TIME 20 sbit sdi P10 TLC 5615DA 轉(zhuǎn)換與單片機(jī)接口 sbit sclkP11 sbit scs P12 sbit sdo P13 void spiwrite uchar x uchar i for i 0i 8i sdi x i 0x80 sclk 0 delay DELAY_TIME sclk 1 delay DELAY_TIME AD 轉(zhuǎn)換子程序 include tlc1549h include intrinsh bit flag3 0 ulong int temp_1temp include mh include reg51h include nokiah sbit ccs P32 TLC1549 與單片機(jī)連接接口 sbit ioclk P34 sbit dout P33 sbit ccs_1 P35 sbit ioclk_1 P37 sbit dout_1 P36 extern bit flag3 uint tlc1549 AD 轉(zhuǎn)換 uchar i uint temp 0 ccs 1 _nop_ ccs 0 for i 0i 10i ioclk 0 temp temp 1 dout ioclk 1 _nop_ ccs 1 return temp void adzh uchar geshix1x2 電流檢測測出電流實(shí)際值 temp tlc1549 temp 10 temp 025 輸出 AD轉(zhuǎn)換后的電流值 shi temp1000 ge temp100 10 x1 temp10 10 x2 temp10 if flag3 writeshuzi 40shi 顯示電流值 writeshuzi 50ge writeshuzi 6010 writeshuzi 70x1 writeshuzi 80x2 writeshuzi 9013 uint tlc1549_1 AD 轉(zhuǎn)換 uchar i uint temp 0 ccs_1 1 _nop_ ccs_1 0 for i 0i 10i ioclk_1 0 temp temp 1 dout_1 ioclk_1 1 _nop_ ccs_1 1 return temp void adzh_1 電壓檢測測出電壓實(shí)際值 uchar geshix1x2 temp_1 tlc1549_1 temp_1 10 輸出 AD轉(zhuǎn)換后的電壓 temp_1 temp_1110 shi temp_11000 ge temp_1100 10 x1 temp_110 10 x2 temp_110 if flag3 writeshuzi 42shi 顯示實(shí)測電壓值 writeshuzi 52ge writeshuzi 6210 writeshuzi 72x1 writeshuzi 82x2 writeshuzi 9212 void power