51單片機(jī)寄存器手冊(cè)速查,一目了然
上傳時(shí)間: 2013-12-26
上傳用戶:sglccwk
基于c51小車測速的程序設(shè)計(jì)。
標(biāo)簽: c51 小車測速 程序設(shè)計(jì)
上傳時(shí)間: 2014-12-26
上傳用戶:13686209316
pwm調(diào)速計(jì)算軟件,很實(shí)用的
標(biāo)簽: PWM 調(diào)速 計(jì)算軟件
上傳時(shí)間: 2013-10-09
上傳用戶:Wwill
mcs51指令系統(tǒng)速查卡
標(biāo)簽: mcs 51 指令系統(tǒng) 速查
上傳時(shí)間: 2013-12-28
上傳用戶:rnsfing
介紹智能小車實(shí)現(xiàn)測速及避障硬件及軟件的設(shè)計(jì)方法
上傳時(shí)間: 2013-10-24
上傳用戶:qimingxing130
54-74HC 速查手冊(cè)全集
上傳時(shí)間: 2013-11-20
上傳用戶:zhaiye
基于單片機(jī)用軟件實(shí)現(xiàn)直流電機(jī)PWM 調(diào)速系統(tǒng)
標(biāo)簽: PWM 單片機(jī) 軟件實(shí)現(xiàn) 直流電機(jī)
上傳時(shí)間: 2013-11-13
上傳用戶:lo25643
數(shù)字控制的交流調(diào)速系統(tǒng)所選用的微處理器、功率器件及產(chǎn)生PWM波的方法是影響交流調(diào)速系統(tǒng)性能好壞的直接因素。在介紹了正弦脈寬調(diào)制(SPWM)技術(shù)的基礎(chǔ)上,設(shè)計(jì)了一種以8098單片機(jī)作為控制器,以智能功率模塊IPM為開關(guān)器件的變頻調(diào)速系統(tǒng)。通過軟件編程,產(chǎn)生正弦脈沖寬度調(diào)制波形來控制絕緣柵雙極晶體管的導(dǎo)通和關(guān)斷,從而達(dá)到控制異步電動(dòng)機(jī)轉(zhuǎn)速的目的。實(shí)驗(yàn)結(jié)果表明,該系統(tǒng)可調(diào)頻率調(diào)電壓,穩(wěn)定度高,調(diào)速范圍寬,具有較強(qiáng)的實(shí)用價(jià)值 Abstract: AC variable speed with digital control systems used microprocessors, power devices and generate PWM wave is the direct factors of affecting the performance AC speed regulation system. On the basis of introducing the sinusoidal pulse width modulation (SPWM) technology,this paper designed variable speed system which used 8098 as a controller, intelligent power module IPM as switching device. Through software programming, resulting in sinusoidal pulse width modulation waveform to control the insulated gate bipolar transistor turn on and off, so as to achieve the purpose of speed control of induction motors. Experimental results show that the system can adjust frequency modulation voltage, high stability, wide speed range, has a strong practical value.
標(biāo)簽: 8098 SPWM 單片機(jī) 變頻調(diào)速系統(tǒng)
上傳時(shí)間: 2013-11-14
上傳用戶:ynwbosss
為了解決磁放大器性能測試過程中,需要對(duì)其供給不同數(shù)值恒定電流的問題,設(shè)計(jì)了一種基于DAC7512和單片機(jī)的數(shù)控恒流源系統(tǒng)。該系統(tǒng)采用AT89C51作為主控器件,將計(jì)算機(jī)發(fā)送的電流控制字命令轉(zhuǎn)換為D/A轉(zhuǎn)換器控制字,通過模擬SPI通信接口,寫D/A控制字到DAC7512,從而控制其輸出相應(yīng)數(shù)字電壓值,經(jīng)差動(dòng)縮放電路、電壓/電路變換電路和功率驅(qū)動(dòng)電路,最后輸出恒定電流。實(shí)驗(yàn)結(jié)果表明,恒流源輸出電流調(diào)節(jié)范圍為-45~+45 mA、精度為±0.1 mA,分辨率達(dá)0.024 4 mA,具有應(yīng)用靈活,外圍電路簡單,可靠性高的特點(diǎn)。該數(shù)控直流恒流源也可為相關(guān)產(chǎn)品的測試系統(tǒng)研發(fā)提供參考。 Abstract: In order to solve the need to supply different values constant current for the magnetic amplifier in testing process, numerical control constant current source system was designed based on DAC7512 chip and microcontroller technology. The system used the AT89C51 as the main chip, which can convert the current control word from computer into to D/A control words. And the system wrote D/A control word into the DAC7512 chip to control the output voltage value by the SPI communication interface, which can output corresponding constant current figures by scaling circuit, the V/I converter and power drive circuit. Experimental results show that the current source output current adjustment range is -45~+45mA, accuracy is ± 0.1mA, and resolution ratio is 0.024 4mA
標(biāo)簽: 7512 DAC 數(shù)控直流 恒流源
上傳時(shí)間: 2014-12-27
上傳用戶:invtnewer
摘要:針對(duì)目前直流電機(jī)閉環(huán)調(diào)速系統(tǒng)的成本和控制精度問題,通過探討MCS-51系列單片機(jī)的通用性和易用性,提出了一種采用該系列單片機(jī)的直流電機(jī)閉環(huán)控制方案,并給出了該系統(tǒng)的設(shè)計(jì)思路、電路設(shè)計(jì)和采用PI控制算法的控制程序流程。該系統(tǒng)具有較好的控制精度和較低的成本價(jià)格,可以在直流電機(jī)閉環(huán)調(diào)速領(lǐng)域中廣泛應(yīng)用。關(guān)鍵詞:閉環(huán)直流調(diào)速系統(tǒng);MCS-51單片機(jī)
標(biāo)簽: MCS 51 單片機(jī) 中的應(yīng)用
上傳時(shí)間: 2013-10-27
上傳用戶:zl5712176
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