adc8009應用實例--基于51單片機的PWM直流電機調速proteus仿真
上傳時間: 2013-10-22
上傳用戶:gy592333
經驗證有效可行易懂的程序,可以講講模擬信號通過stc12c5a60s2在P0口內置的AD轉換轉換為輸在信號并顯示在1206液晶上
上傳時間: 2013-10-11
上傳用戶:skfreeman
主要是直流電機的一些資料
上傳時間: 2013-11-23
上傳用戶:上善若水
單片機的無刷直流電機的控制
上傳時間: 2013-10-15
上傳用戶:fujiura
LMD18200 是美國國家半導體公司(NS)推出的專用于運動控制的H橋組件。同一芯片上集成有CMOS 控制電路和DMOS 功率器件, 峰值輸出電流高達6A ,連續輸出電流達3A ,工作電壓高達55V ,還具有溫度報警和過熱與短路保護功能。主要應用于位置控制、速度控制、工業機器人和各種數控設備都需要直流電機和步進電機.....
上傳時間: 2013-10-14
上傳用戶:海陸空653
基于單片機用軟件實現直流電機PWM 調速系統
上傳時間: 2013-11-13
上傳用戶:lo25643
介紹一種基于AVR單片機(Atmegal28)實現的直流電源監控系統的設計方案及其軟、硬件設計思路。該監控系統能檢測直流電源系統的各種實時運行數據及狀態,自動監測各種故障并發出聲光報警,實現蓄電池的智能管理;通過RS232或RS485與上位機通信,實現遙信、遙測、遙控和遙調等功能,能較好地滿足無人值守變電站及配網自動化的需要。
上傳時間: 2013-11-11
上傳用戶:gxf2016
設計了一種基于PIC16C71單片機的數字水溫配制閥。該配制閥采用NTC熱敏電阻作溫度傳感器,與固定電阻組成簡單分壓電路作為水溫測量電路,利用PIC16C71單片機內置的8位A/D轉換器把熱敏電阻上的模擬電壓轉換為數字量,PIC16C71單片機控制直流電機驅動混水閥調節冷熱水的混合比例實現水溫調節。給出了控制電路圖,對水溫測量電路的參數選擇和測溫精度作了詳細討論。實驗和分析表明,選用阻值較大的NTC熱敏電阻和分壓電阻可較好地解決熱敏電阻因功耗較大造成的熱擊穿問題。 Abstract: A digital valve for controlling water temperature based on PIC16C71 was presented in this paper.A bleeder circuit which consisted of a NTC thermistor as temperature sensor and a fixed resistance was designed as water temperature measuring circuit.The analog voltage on the thermistor was converted into digital signal by a 8-bit A/D converter embedded in PIC16C71. Based on the digital signal, the MCU PIC16C71 drived the valve by a DC motor to adjust the water temperature through adjusting the proportion of hot water and cold water.The circuit diagram of controller was given,the principle,the component parameters and the accuracy of measuring temperatures were also dissertated in detail. It was found by experiment and analysis that thermal breakdown of thermistor caused by high power could be solved by selecting thermistor and fixed resistance with high impedance value.
上傳時間: 2013-11-08
上傳用戶:Yue Zhong
為了解決磁放大器性能測試過程中,需要對其供給不同數值恒定電流的問題,設計了一種基于DAC7512和單片機的數控恒流源系統。該系統采用AT89C51作為主控器件,將計算機發送的電流控制字命令轉換為D/A轉換器控制字,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數字電壓值,經差動縮放電路、電壓/電路變換電路和功率驅動電路,最后輸出恒定電流。實驗結果表明,恒流源輸出電流調節范圍為-45~+45 mA、精度為±0.1 mA,分辨率達0.024 4 mA,具有應用靈活,外圍電路簡單,可靠性高的特點。該數控直流恒流源也可為相關產品的測試系統研發提供參考。 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
上傳時間: 2014-12-27
上傳用戶:invtnewer
摘要:針對目前直流電機閉環調速系統的成本和控制精度問題,通過探討MCS-51系列單片機的通用性和易用性,提出了一種采用該系列單片機的直流電機閉環控制方案,并給出了該系統的設計思路、電路設計和采用PI控制算法的控制程序流程。該系統具有較好的控制精度和較低的成本價格,可以在直流電機閉環調速領域中廣泛應用。關鍵詞:閉環直流調速系統;MCS-51單片機
上傳時間: 2013-10-27
上傳用戶:zl5712176