ABSTRACTThe flyback power stage is a popular choice for single and multiple output dc-to-dc converters at powerlevels of 150 Watts or less. Without the output inductor required in buck derived topologies, such as theforward or push-pull converter, the component count and cost are reduced. This application note will reviewthe design procedure for the power stage and control electronics of a flyback converter. In these isolatedconverters, the error signal from the secondary still needs to cross the isolation boundary to achieveregulation. By using the UC3965 Precision Reference with Low Offset Error Amplifier on the secondaryside to drive an optocoupler and the UCC3809 Economy Primary Side Controller on the primary side, asimple and low cost 50 Watt isolated power supply is realized.
標(biāo)簽： 隔離
上傳時(shí)間： 2021-11-24
上傳用戶：kingwide
研究一種智能掃地機(jī)器人。從硬件系統(tǒng)控制模塊設(shè)計(jì)到主要技術(shù)調(diào)試進(jìn)行了較詳細(xì)的闡述。以STM32單片機(jī)為控制核心與電機(jī)驅(qū)動(dòng)、紅外線路徑識(shí)別模塊等相互協(xié)調(diào)應(yīng)用。進(jìn)行電路搭建和程序編寫(xiě)。實(shí)現(xiàn)了智能掃地機(jī)器人紅外線避障和自動(dòng)掃地功能,其清掃面積能達(dá)到約70%,清掃率約60%,很大程度受到自身機(jī)械機(jī)構(gòu)的限制,后期將對(duì)小車的機(jī)械結(jié)構(gòu)進(jìn)行完善。This paper studies an intelligent sweeping robot.From the hardware system control module design to the main technical debugging are described in detail.STM32 MCU is used as the control core to coordinate with motor drive and infrared path recognition module.Conduct circuit building and programming.The functions of infrared obstacle avoidance and automatic sweeping of intelligent sweeping robot are realized.Its cleaning area can reach about 70%and the cleaning rate is about 60%.Because it is limited by its own mechanical mechanism to a great extent,the mechanical structure of the car will be improved in the later stage.
標(biāo)簽： 掃地機(jī)器人
上傳時(shí)間： 2022-03-26
上傳用戶：
以AT89S52單片機(jī)為控制核心,采用電容降壓技術(shù),Buck電路拓?fù)?PWM驅(qū)動(dòng)模塊和功率器件散熱設(shè)計(jì),通過(guò)高速的數(shù)據(jù)采集、主功率輸入輸出模塊和控制模塊,設(shè)計(jì)一種新型智能車載充電器.在充電過(guò)程中,通過(guò)負(fù)脈沖瞬間放電實(shí)現(xiàn)對(duì)鉛酸蓄電池的再生修復(fù),提高電池的有效容量,延長(zhǎng)使用壽命.該充電器體積小、速度快、效率高、可靠性好.With AT89S52 single chip computer as the control core,a new type of intelligent car-carried charger was designed by using capacitance step-down technology,Buck circuit topology,PWM driving module and power device heat dissipation design,through high-speed data acquisition,main power input and output module and control module.In the charging process,the regeneration and repair of lead-acid batteries are realized by instantaneous discharge of negative pulse,which improves the effective capacity of batteries and prolongs their service life.The charger has the advantages of small size,fast speed,high efficiency and good reliability.
標(biāo)簽： 車載充電器
上傳時(shí)間： 2022-03-27
上傳用戶：
本文設(shè)計(jì)了一種磁致伸縮位移傳感器,介紹了該磁致伸縮位移傳感器的測(cè)量原理,通過(guò)結(jié)構(gòu)優(yōu)化設(shè)計(jì)提高了儀器的性能,詳述了硬件電路設(shè)計(jì)及實(shí)現(xiàn)方法,完成了軟件設(shè)計(jì),實(shí)現(xiàn)了高壓充電、問(wèn)詢脈沖加載、時(shí)間測(cè)量及濾波等功能,并通過(guò)實(shí)驗(yàn)對(duì)其性能進(jìn)行了驗(yàn)證。所研制的磁致伸縮位移傳感器具有測(cè)量精度高、長(zhǎng)期穩(wěn)定性好等特點(diǎn),滿足了大量程、高精度、惡劣環(huán)境等測(cè)量的要求。A kind of sensor based on magnetostrictive principle is designed.The measuring principle of the magnetostrictive displacement sensor is introduced,the performance of the instrument is improved by the structural optimization design,and introduced the hardware circuit design and the realization method,completed the software design,realized the functions of the high voltage charging,inquiries pulse loading,time measurement and filtering,and its performance is verified through the experiment.The magnetostrictive displacement sensor has the characteristics of high measuring precision.The sensor meets the requirements of large range,high precision,poor environment and so on.
標(biāo)簽： 位移傳感器
上傳時(shí)間： 2022-04-06
上傳用戶：
摘要：介紹了以FreeModbus協(xié)議找在嵌入式搶占實(shí)時(shí)操作系統(tǒng)μC/OS-l的STM32平臺(tái)上，成功實(shí)現(xiàn)了Modbus協(xié)議的移植。通過(guò)詳細(xì)分析FreeModbus協(xié)議花并編寫(xiě)STM32F103VET6微處理器的底層驅(qū)動(dòng)，成功實(shí)現(xiàn)了工業(yè)Modbus協(xié)議RTU和ASCll兩種模式的通信功能。測(cè)試結(jié)果表明，在實(shí)際工業(yè)生產(chǎn)控制和儀表開(kāi)發(fā)中，應(yīng)用Freemodbus協(xié)議，完全符合工業(yè)數(shù)據(jù)采集、實(shí)時(shí)控制和數(shù)據(jù)處理等廠級(jí)重復(fù)性和精確度要求，在一定程度上降低了工業(yè)儀表開(kāi)發(fā)的周期及成本。關(guān)鍵詞：實(shí)時(shí)操作系統(tǒng)，uC/OS-ll，F(xiàn)reeModbus，Modbus協(xié)議，STM32Abstract:This paper introduces FreeModbus stack transplanted to the STM32 platform which has been embedded in the preemptive real-time operating system uC/OS-ll，in order that the transplantation of the Modbus protocol is successfuly im-plemented.The FreeModbus stack is analyzed in detail and STM32F103VET6 microprocessor underlying driver is writed，so that the two Modbus industrial communication function RTU and ASCll are successfully realized.Keywords:time operating system，uC/OS-ll，.FreeModbus，Modbus協(xié)議，STM32
標(biāo)簽： freemodbus 通信協(xié)議
上傳時(shí)間： 2022-06-25
上傳用戶：
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