為設計高效率、低損耗的PFC電路,本文基于UCC28019進行電路設計。以UCC28019輸出的PWM波形來控制Boost升壓斬波為核心電路,使電路中的電容交替地充放電、電感交替的儲存和釋放能量,最后實現在輸入AC20V~24V電壓情況下穩定輸出DC38V。測試結果表明,系統實現效率為95%左右,電壓調整率小于1%,電源功率因數0.99。交流輸入電壓為19.0-25.8 V時,輸出直流電壓穩定性較好,電感無明顯嘯叫且紋波小,具有一定的帶負載能力和實用性。In order to design the PFC circuit with high efficiency and low loss,this paper designs the circuit based on UCC28019.The PWM waveform output by UCC28019 is used to control boost chopper as the core circuit,which alternately charges and discharges capacitors,stores and releases energy by inductors,and finally achieves stable output of DC38 V under the input voltage of AC20 V~24 V.The test results sHow that the system achieves about 95% efficiency,the voltage adjustment rate is less than 1%,the power factor is 0.99,and the AC input voltage is 19.0-25.8 V.The output DC voltage stability is good,the inductance has no obvious whistle and the ripple is small,so it has certain load capacity and practicability.
上傳時間: 2022-04-03
上傳用戶:
以單片機控制A/D轉換器TLC549為例,對A/D轉換器的主要技術指標進行了分析研究,在Proteus平臺下,完成了A/D轉換電路的構建,采用器件工作時序方式進行程序編寫,借助仿真圖表、虛擬儀器等工具對A/D轉換的數據進行測量并對失調誤差、增益誤差、微分非線性、積分非線性和轉換時間等重要參數進行了詳細分析。結果表明:使用Proteus軟件可對A/D轉換過程進行定性分析,將抽象的A/D轉換器技術指標直觀化、形象化展現出來,有助于學生更好地理解A/D轉換過程。The main technical indicators of A/D converter were analyzed and studied with an example from A/D converter TLC2543 which is controlled by using SCM.It was completed the construction of the A/D converter circuit under the Proteus software.The programming based on the operation sequence of the chip is put forward.With the aid of the simulation tools such as virtual instrument,simulation charts provided by Proteus,the important parameters of circuit such as offset error,gain error,differential nonlinearity(DNL),integral nonlinearity (INL) and conversion time are analyzed detailedly.Simulation results sHow that the A/D conversion process can be qualitatively analyzed and visualized the abstract indicators of A/D.The system can help students better to understand the SCM conversion process.
上傳時間: 2022-04-04
上傳用戶:
為了提高超高頻RFID系統中閱讀器在低信噪比的情況下仍具有較高的識別能力,提出一種基于FPGA系統結合軟件無線電方法實現超高頻RFID射頻前端電路方案。超高頻射頻識別系統必須符合EPC Class 1generation 2標準,所設計的電路系統以Xilinx公司的XC6SLX16-2CSG324FPGA芯片為硬件基礎,將數字基帶調制解調和中頻濾波電路在FPGA系統中設計實現,重點闡述了射頻前端電路的設計結構、AD/DA轉換電路,以及數字濾波器的設計。實驗結果表明,所設計的超高頻RFID閱讀器簡化了前端電路系統結構,提升了穩定性,增強了抗干擾能力。該電路系統在信噪比較低的情況下,能夠較好地實現915MHz頻率的射頻接收和發送。In order to improve the reader UHF RFID system still has a higher ability to identify,in the case of low signal-to-noise ratio.The UHF RFID systems must comply with EPC Class 1 generation 2 standard.In this paper,the design of the circuit system based on Xilinx's XC6SLX16-2CSG324 FPGA chip,and presents UHF RFID RF front-end circuit with software radio based on FPGA system.Digital baseband modem and IF filter circuit is designed and implemented in the FPGA system,and focused on designing the structure of the RF front-end circuit,AD/DA conversion circuits,and digital filter.Experimental results sHow that the UHF RFID reader de...
標簽: 915mhz 超高頻 rfid 閱讀 射頻 前端 電路 設計
上傳時間: 2022-04-17
上傳用戶:shjgzh
超聲波換能器作為一種實用的檢測手段,能實現聲波所攜帶的信息和電能之間轉換。它的性能優良,價格低廉,操作方便,易于調試,因此在工農業生產中發揮著重要的作用。但目前換能器驅動電路的發射頻率多為40 kHz,本文針對1 MHz的超聲波換能器電路進行了設計,主要介紹了它的發射驅動電路和接收驅動電路的設計方案,并對它們的功能進行了詳細地說明。最后搭建實驗平臺,并對電路的輸入、輸出模塊進行了測試。實驗結果表明,換能器電路運行良好,可以為超聲波高精度測量領域的應用提供參考。As a practical means of detection, ultrasonic transducer can realize the conversion between theinformation carried by sound wave and electric energy.It has the advantages of excellent performance,low cost, convenient operation and debugging, so plays an important role in industrial and agriculturalproduction.However, the transmitting frequency of the driving circuit for most transducer is 40 kHz.Thecircuit of 1 MHz ultrasonic transducer is designed In this paper. It mainly introduces the emissive drivingcircuit and the receiving circuit design and the detailed function of them. Finally, the experimentalplatform is built, and the circuit of input and output were tested. Experiments sHow that the transducer' s...
上傳時間: 2022-04-28
上傳用戶:
為解決移相全橋電路驅動及相角控制問題,設計了一種數字控制的移相全橋驅動電路.以TPL521為光耦隔離、IR2110為柵極驅動芯片.由DSP產生PWM信號,經過光耦隔離和邏輯電路后送至IR2110進行相角控制.文章對IR2110驅動電路原理進行分析及參數進行設計,對TMS320F28335進行設置并給出部分代碼.實驗結果表明:通過TMS320F28335可產生的不同相角的PWM波形,滿足了移相全橋對不同相角控制的要求.In order to solve the problem of phase-shifted full-bridge circuit driving and phase angle control,a digitally controlled phaseshifted full-bridge driving circuit was designed. TPL521 optocoupler isolation,IR2110 gate driver chip. PWM signals are generated by the DSP and sent to the IR2110 for phase angle control after optocoupler isolation and logic circuits. This text carries on the analysis to the principle of IR2110 drive circuit and parameter design,set up and give out some code to TMS320F28335. The experimental results sHow that the PWM waveforms with different phase angles generated by TMS320F28335 can meet the requirements of phase-shifted full-bridge control for different phase angles.
上傳時間: 2022-05-03
上傳用戶:zhanglei193
基于PSIM仿真軟件,分析了Boost電路拓撲結構,設定了參數要求進行電路仿真設計,通過電路仿真軟件PSIM對Boost電路工作在CCM模式下,合理設置占空比參數。實驗結果表明理論分析與仿真的一致性和參數設計的正確性,輸出電壓和電流參數穩定,Boost電路輸出效率高。This design is based on PSIM simulation software,analyzes the topology of Boost circuit,sets the parameter re- quirements for circuit simulation design,and reasonably sets the duty cycle parameters for Boost circuit working in CCM mode through PSIM simulation software.The experimental results sHow that the theoretical analysis and simulation are consis- tent and the parameter design is correct,the output voltage and current parameters are stable.
上傳時間: 2022-05-04
上傳用戶:
說明: DHT11+12864 單片機數碼顯示的51源碼(DHT11+12864 sHow)
上傳時間: 2022-05-27
上傳用戶:
VIP專區-嵌入式/單片機編程源碼精選合集系列(10)資源包含以下內容:1. 通用93c06-93c86系列.2. P89CXX編程器控制CPU接收和控制程序.3. 我收集的fft算法.4. rs糾錯編碼-編碼部分.5. rs糾錯編碼-譯碼部分.6. MSP430上運行RTOS實例.7. 430DAY精美手表DEMO程序和原理圖.8. MSP430F413 C語言子程序庫.9. AT29C040讀寫源程序.10. 嵌入式技術漫談中科大bbs版聚講座.11. S3C44BOX的BIOS。可使用的命令:help --- sHow help ? --- = help date --- sHow or set current date time --.12. 一個與GP-proface人機界面通訊的上位機程序.13. 開放源碼串口通訊的程序(C).14. 一個嵌入式TCP IP 實現.15. Dos下中斷驅動的串口類(CPP).16. 一個中斷驅動的具有緩沖區的串口源碼(C).17. GOAHEAD WEBSERVER嵌入式的源碼.18. 串口打印字符程序.19. pdiusbd12的固件程序.20. LCD source code.21. MSP-FET430P140 C語言例子程序.22. 一個IIc通信實例,主要用于串口通信方式只做為參考.本例是一個音量控制的源碼..23. 10進制to BCD轉換算法.24. 16C554擴展多串口.25. 12232點陣信利液晶基本驅動程序.26. AT24CXX 芯片驅動程序.27. 嵌入式c語言編程,狂好的書.28. sony servo.29. 索尼CX3068VCD伺服的隨身聽.30. 臺灣SUNPLUS的MP3播放器原理圖.31. 基于fpga的嵌入系統的設計.32. at90s8535 timer1 的編程.33. usbn9603的驅動程序.34. PPPoE協議在Psos中的實現源代碼.35. 嵌入式GSM短信息接口的軟硬件設計.36. haojige.37. 拼音輸入的c語言片成.38. 湊個崖邊÷÷÷的.39. CodeWarrior 使用教程.40. 嵌入式系統的網絡仿真.
上傳時間: 2013-05-15
上傳用戶:eeworm
VIP專區-嵌入式/單片機編程源碼精選合集系列(144)資源包含以下內容:1. Cypress 68013產品開發原理圖.2. 在SPI 平臺優化好的G.711代碼,保證好用.3. 基于單片機步進電機控制正反轉.4. C環境 TCON T118芯片驅動文件.5. S3C44B0X nFlash ,測試通過.6. 智能門禁系統蓄電池充電原理圖.7. arm嵌入式系統plc22**ssp作spi主機實驗.8. arm嵌入式系統lpc22**ssp作spi從機實驗.9. arm嵌入式系統lpc22**錯誤的喂狗產生中斷源代碼.10. 適用于SED1335的24點陣中文字庫。原來為打印字庫.11. uc-gui方面的開發程序.12. arm_ads 程序原代碼.13. arm_ads 程序調試教程.14. 一個高級培訓班的內部資料,非常寶貴,讀者可以掌握嵌入式基本思路.15. μITRON4.0 source code for ARM.16. vb與PLC的通訊程序 vb與PLC的通訊程序.17. usb鼠標資料,包括詳細的電路原理圖,以及源程序等.18. 做的一個簡易的計算器.19. 此文件為ipod程序.20. 此文檔為twell8816芯片資料.21. C8051F系列單片機開發與C語言編程.22. LPC240-1 詳細介紹了LPC240-1各部分的硬件及其代碼.23. m8 的 文件 原理與手冊.24. 用于s3c2410的spi接口驅動。初學者用一定的參考價值。.25. 完全的TMS320F2812介紹.26. keil C51學習手冊 內涵詳細的介紹.27. 關于c++的繪圖程序 with pictures sHow the progress of the load ce sHown nboot.28. I2C IP.29. 2802 步進電機控制器.30. pci驅動開發介紹.31. 這是一個關于PCI驅動開發的開發文檔資料,里面詳細介紹了開發過程.32. PCI BIOS SPECIFICATION Revision 2.1版本.33. PCI BIOS SPECIFICATION Revision 2.1.34. 這是通道控制用的閘機源碼.35. 控制步進電動機做正反向調速控制.36. 能用串口修改時間的時鐘程序.37. 嵌入式數據庫Berkeley DB-4.5.20源代碼.38. lcd12864點陣液晶屏的測試代碼.39. ULINK制作.40. 嵌入式經典教材初學者很適合.
上傳時間: 2013-07-23
上傳用戶:eeworm