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以AT89S52單片機為控制核心,采用電容降壓技術,Buck電路拓撲,PWM驅動模塊和功率器件散熱設計,通過高速的數據采集、主功率輸入輸出模塊和控制模塊,設計一種新型智能車載充電器.在充電過程中,通過負脈沖瞬間放電實現對鉛酸蓄電池的再生修復,提高電池的有效容量,延長使用壽命.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.
標簽：
車載充電器
上傳時間：
2022-03-27
上傳用戶：
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特點:o ARM? Cortex?-M4 CPU 平臺o 高達150MHz 的高性能Cortex?-M4 處理器o 集成FPU 和MPUo 內存o 512KB 片上SRAMo 2KB 至512KB 可編程保持存儲區o 閃存o 1MB 集成閃存o 原地執行NOR 閃存接口，在閃存中執行時接近0 等待狀態o 供電和復位管理系統o 片上穩壓器，支持1.7V-3.6V 輸入o 上電復位（POR）o 時鐘管理o 10-30MHz 晶體振蕩器o 內部16MHz RCo 32kHz 晶體振蕩器o 內部32kHz RCo 具有可編程輸出頻率的低功耗PLLo 通用DMA：具有硬件流控制的8 通道DMA 控制器o 安全o 使用TRNG（真隨機數發生器）的簡單加密引擎o 定時器/計數器o 1x 系統節拍定時器o 4x 32 位定時器o 1x 看門狗定時器o 功耗（待確認）o 滿載：待定uA/MHz @ 25°Co 運行：待定uA /MHz @ 25°Co 停止：待定@ 25°Co 保留：待定@ 25°C，32kB 保留存儲器o 待機：待定@ 25°C，內部32kHz RCo 12 位逐次逼近寄存器（SAR）ADCo 每秒最多2M 樣本o 可通過8:1 多路復用器選擇輸入o 1 個帶有集成PHY 的USB 2.0 高速雙角色端口o 兩個SD / SDIO 主機接口o SD/SDIO 2.0 模式：時鐘高達50MHzo LCD 控制器o 分辨率高達480x320o 6800 和8080 異步模式（8 位）o JTAG 調試功能o 3 個PWM（6 個輸出），3 個捕捉和3 個QEP 模塊o 4x UART，帶有HW 流控制，最高可達4Mbpso 3x I2C，支持Fast Mode+（1000kbps）o 2x I2S 接口o 3x SPI 主器件高達25MHz，1x SPI 從器件高達10MHzo 32 個GPIOo 68 引腳QFN 封裝o 溫度范圍：-40 至85°C4.1 帶FPU 內核的ARM?CORTEX?-M4帶有FPU 處理器的ARM?Cortex?-M4 是一款32 位RISC 處理器，具有出色的代碼和功率效率。它支持一組DSP 指令，以允許高效執行信號處理算法，非常適合于可穿戴和其他嵌入式市場。集成的單精度FPU（浮點單元）便于重用第三方庫，從而縮短開發時間。內部內存保護單元（MPU）用于管理對內的訪問，以防止一個任務意外破壞另一個活動任務使用的內存。集成緊密耦合的嵌套向量中斷控制器，提供多達16 個優先級。4.2 系統內存Bock 包含512kB 零等待狀態SRAM，非常適合于當今算法日益增長的需求。同時，內存被細分為更小的區，從而可以單獨地關閉以降低功耗。4.3 閃存和XIP 單元提供1MB 的集成NOR 閃存，以支持CPU 直接執行。為了提高性能，XIP 單元具有集成的緩存系統。緩沖內存與系統內存共享。與從系統內存運行性能相比，XIP 單元使得許多應用程序的運行接近100％。4.4 ROM集成ROM 固件包含通過NOR 閃存正常引導所需的引導加載程序，支持用于批量生產的閃存編程，還包括用于調試目的的UART 和USB 啟動功能。
標簽：
tg401
上傳時間：
2022-06-06
上傳用戶：qdxqdxqdxqdx
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Mathematical modeling has become an important part of the research and devclopment work in engineering and scicnce. Retaining a competitive edge requiresa fast path between ideas and prototypes, and in this regard mathematical modeling and simulation provide a valuable shortcut for understanding both qualitative and quantitative aspects of scientific and engineering design. To assist you in gaining this edge, COMSOL Multiphysics offers state-of-the art performance, being built from the ground up with a Java3D interface and C/C++ solvers.The Acoustics Module is an optional package that extends the COMSOL Multiphysicsmodcling cnvironment with customized user interfaces and functionality optimizcd for the analysis of acoustics. Like all modules in the COMSOL family, it provides a brary of prewritten ready-to-run models that make it quicker and casier to analyze disciplinc-specific problcms.
標簽：
comsol
聲學模塊
上傳時間：
2022-06-19
上傳用戶：
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In this presentation, we will look at what the Serial Peripheral Interface, otherwise known as the SPI, is. and how it is used to communicate data to and from the PICmicro microcontroller.SPl is frequently used when few 1/O lines are available, but communication between two or more devices must be fast and easy to implement.In this presentation, we will discuss the following topics: We will first cover an Overview of SPI This section of the tutorial will introduce you to SPI and its concepts.Next, we will examine the use of SPI on the PICmicro MCU.The details of how SPI is implemented on a PICmicro device will be examined.Then, a Code Walkthrough will be given.The walkthough will explore code for both an SPI Master and SPI Slave. The example will have the Master generate data for sending to the slave.Finally, there will be a few resources given at the end of the presentation. These resources will allow you to explore in more detail the SPI interface
標簽：
spi協議
上傳時間：
2022-06-20
上傳用戶：
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Datasheet SHT3x-DISHumidity and Temperature Sensor? Fully calibrated, linearized, and temperaturecompensated digital output? Wide supply voltage range, from 2.4 V to 5.5 V? I2C Interface with communication speeds up to 1MHz and two user selectable addresses? Typical accuracy of ? 2 %RH and ? 0.3 °C? Very fast start-up and measurement time? Tiny 8-Pin DFN package
標簽：
sht30
溫濕度傳感器
上傳時間：
2022-06-29
上傳用戶：
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MotioninterfaceTM is becoming a "must-have"function being adopted by smartphone and tablet manufacturers due to the enormous value it adds to the end user experience. In smartphones, it finds use in applications such as gesture commands for applications and phone control, enhanced gaming, augmented reality, panoramic photo capture and viewing, and pedestrian and vehicle navigation. With its ability to precisely and accurately track user motions, MotionTracking technology can convert handsets and tablets into powerful 3D intelligent devices that can be used in applications ranging from health and fitness monitoring to location-based services. Key requirements for Motionlnterface enabled devices are small package size, low power consumption, high accuracy and repeatability, high shock tolerance, and application specific performance programmability-all at a low consumer price point.
標簽：
mpu6050
上傳時間：
2022-07-06
上傳用戶：zhaiyawei
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Agenda■Motor Types Overview■BLDC Motor Applications■Comparison of DC to Brushless DC Motors■Hall Sensors■Six-Step Commutation■Sensorless Commutation with Back-EMFVector Motor Control basicsClosed-Loop Speed Control■Introduction to BLDC Motor Control Evaluation Kit■SummaryAll the popular motor types have their specific applications, and all can be controlled with microcontrollers.We wll talk about Brushless DC motors as it is the fast growing motor type today.Motors used in modern Air conditioners, home appliances, tools, even electric bikes are all going to Brushless DC.
標簽：
bldc
電機驅動
上傳時間：
2022-07-07
上傳用戶：
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? VL53L1X OverView? VL53L1X Software Package? Default and FAST mode? Ultra light driver.? VL53L1X GUI? VL53L1X Multi sensor design? STM32 FW: Import, Compile, Run, Debug…? What is Xtalk?? Cover Window and ID design? How about Human and object reflectance at 940 nm ?
標簽：
激光測距芯片
stm32
上傳時間：
2022-07-17
上傳用戶：bluedrops
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Overview The MT7628 router-on-a-chip includes an 802.11n MAC and baseband,a 2.4 GHz radio and FEM,a 575/580MHz MIPS? 24K% CPU core,a 5-port 10/100 fast ethernet switch. The MT7628 includes everything needed to build an AP router from a single chip. The embedded high performance CPU can process advanced applications effortlessly, such as routing, security and VolP. The MT7628 also includes a selection of interfaces to support a variety of applications, such as a USB port for accessing external storage.Features· Embedded MIPS24KEc(575/580 MHz) with 64KBl-Cache and 32 KB D-Cache·2T2R 2.4 GHz with 300 Mbps PHY data rate· Legacy 802.11b/g and HT 802.11n modes·20/40 MHz channel bandwidth· Reverse Data Grant(RDG)· Maximal Ratio Combining(MRC)· Space Time Block Coding(STBC)· MCM 8 Mbytes DDR1 KGD(MT7628KN)
標簽：
mt7628
上傳時間：
2022-07-18
上傳用戶：
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Simulation can provide a lot of information about what the system is doing. We canadd the effect of different element, like Encoder resolution, ADC sampling rate, etc and understand how does it affect the system. Another benefit is the possibility to slow down the process, to gain insight on what happens of fast systems or, vice versa, speed up slow process.Because National Instruments is a unique company in the fact the we provide a fullhardware solution couple with a full development platform, we can use this tools in very particular ways For example, it is possible to combine the LabVIEW Control Design and Simulation Module along with the FPGA module to quickly prototype a controller. One of the main benefits of this approach is that there is no need to compile the FPGA code, which allows for a quick algorithm design turnaround and debugging.
標簽：
pid控制
上傳時間：
2022-07-20
上傳用戶：
