目前電動汽車主要以鋰電池作為動力來源,為了提高鋰電池的使用時間和安全性,為鋰電池提供安全良好的運行環境,電池管理系統應運而生。BMS主控單元基于S32K144汽車級單片機,通過主從式網絡控制結構能夠對鋰電池的各個參數進行采集與分析。采用擴展卡爾曼濾波對電池的荷電狀態(SOC)進行估算,克服普通估算方法無法避免電池內阻誤差的缺點,通過Matlab/Simulink軟件仿真驗證可使估算誤差達到2%以內。At present,electric vehicles mainly use lithium batteries as the power source.In order to improve the running time and safety of lithium batteries,a safe and good operating environment for power batteries is provided,and a battery management system(BMS) has emerged.The BMS main control unit is based on the S32K144 automotive-grade control chip.Through the master-slave network control structure,it can collect and analyze the various parameters of the lithium battery.The Extended Kalman Filter(EKF) is used to estimate the state of charge(SOC) of the battery,which overcomes the shortcomings of the internal estimation method that cannot overcome the internal resistance error of the battery.It can be verified by Matlab/Simulink software simulation.The estimation error is within 2%.
上傳時間： 2022-03-26
上傳用戶：XuVshu
數字示波器功能強大,使用方便,但是價格相對昂貴。本文以Ti的MSP430F5529為主控器,以Altera公司的EP2C5T144C8 FPGA器件為邏輯控制部件設計數字示波器。模擬信號經程控放大、整形電路后形成方波信號送至FPGA測頻,根據頻率值選擇采用片上及片外高速AD分段采樣。FPGA控制片外AD采樣并將數據輸入到FIFO模塊中緩存,由單片機進行頻譜分析。測試表明:簡易示波器可以實現自動選檔、多采樣率采樣、高精度測頻及頻譜分析等功能。Digital oscilloscope is powerful and easy to use, but also expensive. The research group designed a low-cost digital oscilloscope, the chip of MSP430F5529 of TI is chosen as the main controller and the device of EP2C5T144C8 of Altera company is used as the logic control unit. Analog signal enter the programmable amplifier circuit, shaping circuit and other pre-processing circuit. The shaped rectangular wave signal is sent to FPGA for measure the frequency. According to the frequency value to select AD on-chip or off-chip high-speed AD for sampling. FPGA controls the off-chip AD sampling and buffers AD data by FIFO module. The single chip microcomputer receives the data, and do FFT for spectrum analysis. The test shows that the simple oscilloscope can realize automatic gain selection, sampling at different sampling rates, high precision frequency measurement and spectrum analysis.
上傳時間： 2022-03-27
上傳用戶：
本文設計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量原理,通過結構優化設計提高了儀器的性能,詳述了硬件電路設計及實現方法,完成了軟件設計,實現了高壓充電、問詢脈沖加載、時間測量及濾波等功能,并通過實驗對其性能進行了驗證。所研制的磁致伸縮位移傳感器具有測量精度高、長期穩定性好等特點,滿足了大量程、高精度、惡劣環境等測量的要求。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.
標簽： 位移傳感器
上傳時間： 2022-04-06
上傳用戶：
為適應雙向DC/DC功率變換的電流采樣需求,一種高精度高邊電流采樣電路被提出。其基本思想是在功率電路的高邊串入采樣電阻,借助電流鏡原理并引入偏置電流電路,將雙向電流均轉換為正向電壓輸出。通過理論分析與仿真結合的方法對電流鏡采樣原理及4種不同的偏置電流電路方案進行對比,最后通過實驗數據驗證了高精度高邊電流采樣電路的有效性。實驗數據表明,該采樣電路可在-25~75℃的溫度工作范圍內,針對-10~＋10 A范圍內的電流采樣實現優于5%的采樣精度。Current sensing plays an important role in controlling,monitoring or protection functions of power systems.To meet the current sensing requirement of bidirectional DC/DC converters,a high-accuracy bidirectional current sensing circuit is proposed.The proposed current sensing circuit inserts a resistor in the path of the current to be sensed,while the current mirror and biased current circuit are introduced.Therefore,the bidirectional current can be expressed by positive voltage.By theoretical analysis and simulation,the sampling theory is analyzed and four biased current circuits are compared.At last,experimental results verified the proposed method.It is demonstrated that the proposed current sensing circuit can achi...
上傳時間： 2022-04-22
上傳用戶：
數字頻率計是電工電子中常用的測量儀器,數字頻率計通過用輸入待測信號對一特定長度的信號進行計數,從而得出頻率并通過數碼管直觀的顯示出來。本文提出了一種與輸入同步的數字頻率計的設計,提高了頻率計的精度,設計采用Multisim軟件進行設計和仿真的過程,介紹了其工作原理,硬件電路設計和仿真的過程。設計采用了Multisim軟件進行設計和仿真,設計結果得到的驗證。Digital frequency counter is used to measure the frequency of a signal.It is common to use a multivibrator to generate a standard 1 second time base signal and count input signal gated by this signal.However,the asynchronous of this time base signal with input signal will bring errors.In this paper,a high precision frequency counter which use synchronized time base signal generator is proposed.This frequency counter is designed and simulated by Multisim tools and result is verified.
標簽： multisim
上傳時間： 2022-05-08
上傳用戶：
說明： STM8單片機連接CAN芯片 MCP2515 的源碼，已經通過工程驗證。(MCP2515 CAN chip STM8 MCU connections of the source has been verified by engineering.)
上傳時間： 2022-05-17
上傳用戶：
Introduction The Sil9135/Sil9135A HDMI Receiver with Enhanced Audio and Deep Color Outputs is a second-generation dual-input High Definition Multimedia Interface(HDMI)receiver. It is software-compatible with the Sil9133receiver, but adds audio support for DTS-HD and Dolby TrueHD. Digital televisions that can display 10-or 12-bit color depth can now provide the highest quality protected digital audio and video over a single cable. The Sil9135and Sil9135A devices, which are functionally identical, can receive Deep Color video up to 12-bit,1080p @60Hz. Backward compatibility with the DVI 1.0specification allows HDMI systems to connect to existing DVI 1.0 hosts, such as HD set-top boxes and PCs. Silicon Image HDMI receivers use the latest generation Transition Minimized Differential Signaling(TMDS) core technology that runs at 25-225 MHz.The chip comes pre-programmed with High-bandwidth?
上傳時間： 2022-06-25
上傳用戶：
開關升壓型鋰電池充電管理芯片FLD5302/3概述 為開關型兩節或三節鋰離子/鋰 聚合物電池充電管理芯片，非常適合于便攜 式設備的充電管理應用。 集電壓和電 流調節器、預充、充電狀態指示和充電截止 適配器自適應等功能于一體，采用 SOP-8 封裝。 對電池充電分為三個階段：預 充（ Pre-charge ）、恒流（CC/Constant Current）、恒壓（CV/Constant Voltage）過程。 集成過壓及過流保護，確保電芯的 安全。
上傳時間： 2022-06-25
上傳用戶：
eMMC (Embedded Multi Media Card）是MMC協會訂立、主要針對手機或平板電腦等產品的內嵌式存儲器標準規格。eMMC在封裝中集成了一個控制器，提供標準接口并管理閃存，使得手機廠商就能專注于產品開發的其它部分，并縮短向市場推出產品的時間。MMC的應用是對存儲容量有較高要求的消費電子產品。2011年已大量生產的一些熱門產品，如Palm Pre、Amazon Kindle II和Flip MinoHD，都采用了eMMC。為了確認這些產品究竟使用了何種存儲器，iSuppli利用拆機分析業務對它們進行了拆解，發現eMMC身在其中。附件為介紹EMMC5.1標準的數據手冊.
上傳時間： 2022-06-27
上傳用戶：
FU6831 是一款集成 8051 內核和電機控制引擎(ME)的電機驅動專用芯片，8051 內核處理常規事務，ME 處理電機實時事務，雙核協同工作實現各種高性能電機控制。其中 8051 內核大部分指令周期為 1T 或 2T，芯片內部集成有高速運算放大器、比較器、Pre-driver、高速 ADC、高速乘/除法器、CRC、SPI、I2C、UART、多種 TIMER、PWM 等功能，內置高壓 LDO，適用于 BLDC/PMSM 電機的方波、SVPWM/SPWM、FOC 驅動控制。預驅動為 3P3N Predriver 輸出。
標簽： fu6831
上傳時間： 2022-07-09
上傳用戶：
