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数据库课程设计 仓库物资管理系统（JAVAweb源码+mysql+设计报告）
包含文档,各种源码一、 课程设计目的和要求………………………………………………….…3二、课程设计过程…………………………………………………………….4数据库设计的基本步骤如下：……………………………………………….41.需求分析阶段……………………………………………………………..41.1 应用背景……………………………………………………………41.2系统需求分析……………………………………….........................51.3系统可行性分析。………………………………………………….61.4系统E-R图……………………………………………………......
- 2020-12-07下载
- 积分：1
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地图数据可视化processing代码【作业1】
processing做的可视化例子。适合初学者。
- 2020-05-28下载
- 积分：1
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tsmc18rf_pdk_v13 压缩包2
tsmc18rf_pdk_v13 压缩包2一定要把我资源中的三个压缩包下了才行！
- 2020-12-04下载
- 积分：1
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ARCPY使用手册
ARCGIS全部类、函数、属性详细使用方法及示例，根据官方帮助文档汉化整理。
- 2020-06-28下载
- 积分：1
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STM32控制的高压无刷直流电机程序.zip
【实例简介】STM32控制的高压无刷直流电机程序，该程序在KEIL环境下，利用前后台程序实现了无刷直流电机的双闭环控制
- 2021-11-24 00:50:07下载
- 积分：1
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ARMA模型的Matlab代码
ARMA模型的Matlab代码,欢迎大家前来下载
- 2020-11-28下载
- 积分：1
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英飞凌IGBT驱动培训资料
在电力电子装置中的一个重要组成部分,输入连接到控制电路的PWM信号输出端，输出连接到装置各IGBT的门极和发射极，将装置中的控制电路产生的数字PWM信号进行隔离传输和电平转换和功率放大,实现控制电路对IGBT进行开通和关断动作的控制，从而实现装置的功率变换功能。InfineontechnologiesIGBT Gate Drive: Power Suppliesa Gate driving voltage for IGBT+15Vturn-on is normally +15VDriver>□1a Gate driving voltage for IGBTOVturn-off can be oV or negativeWith Single Power Supply5V to-15V)a Negative gate driving voltage+15Vhelps IGBt switch off fasterremain in off state but itDriverneeds dual power suppliesOVWhether to use oV or negativegate driving voltage depends15VWith Dual Power Supplieson the requirement on costZH Liang - Al APperformance05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: InterfaceOpto-couplers is commonly used as interfacingdevices for applications where both signaltransmission and potential isolation are requiredOpto-couplers offers reliable isolation between IGBT(high-potential)& micro-controller(low-potential)Opto-couplers has long signal delay(us)and isexpensiveIsolation +VDpCCMicroDrivercontrollerZH Liang - Al AP05Dec2003Page 6for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveStandard configuration: 2 drivers, 2 power supplies, 2 opto-couplersAdvantages: standard, reliableDisadvantages: using opto-couplers, higher system costIsolation +VDDlCC1DriverCC1MicrocontrollerDD2+VCC2DriverCC2ZH Liang - Al AP05Dec2003Page 7for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveIn half-bridge IGBT drive, opto-couplers offer two functions(1)safety isolation &(2) shifting the potential of the gatesignal from uc potential to high-side potentialIf safety isolation between IGBT& micro-controller is notneeded, then"Level Shift" can replace opto-coupling andrealize function(2)OptoHigh-sideHigh-sidecouplerDriverIGBTMicro-Opto-LoW-sideLow-sidecontrollercouplerDriverIGBTZH Liang - Al AP05Dec2003Page 8for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive Level shiftI FeaturesHVc(600V/1200V)沿PULSERFILTERShort Signal DelayPULSE■Cost- effectiveGEN■ No Safety Isolationevel Shift Half-bridge DriverI BenefitHigh-side““°IGBTO Saving Opto-couplersLevel(lower system costShiftMicro● Wider range ofcontrollerLevelLow-side■■■■■直■口m留■Switching FrequencyShiftIGBT(higher flexibility)ZH Liang - Al AP05Dec2003Page 9for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: CLTNEWO CLT-Coreless Transformer (for signal transmissionu Coils(Primary Secondary Side)realized on SiliconO Short Signal Delay (allowing high or low switching frequencyu Lower Cost(compared to 1200V level-shift driver日 Safety IsolationCLT Half-bridge DriverHigh-sideCLT Single DriverIGBTCLTMicro-controllerCLTIGBTMicro-controllerLoW-sideIGBTZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strapBoot-strap circuit includes only a diode and a capacitora In half-bridge drive, the boot-strap circuit can replace the high-sidepower supply and make single-supply operation possibleWhen the low-side IGBT (or FWD)is on, the diode is forwardbiased and the capacitor is charged by the low-side power supplyvia the low-side IGBT and stores the energyWhen the low-side IGBt(and FWD)is OFF, the diode is reversebiased and blocks the dc-bus voltage to protect the low-sidecircuit. Meanwhile, the capacitor supplies energy to the high-sidedriverThe boot-strap capacitance should be high enough to keep thesupply voltage stable Capacitance needed can be calculatedbased on the working conditions and device parametersZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strap circuitConventional2心菲*|■3 high-side power supplies■1|oW- side power supplyUsing boot-strap circuit心体心心●3 diodes& capacitorso 1 low-side power supplyFeaturesa Diode: ultra-fast recoverya Capacitor: general-purposed ITAa Dependent on low-side IGBTBenefitsSaving 3 PS(transformer cost)22ZH Liang - Al AP05Dec2003Reducing wiring connectionPage 12for internal use onlyInfineon Technologies Asia Pacific
- 2020-12-11下载
- 积分：1
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STM32之间串口通信
两块STM32板子之间进行串口通信，希望有帮助
- 2020-11-30下载
- 积分：1
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模糊PID液位控制系统的设计与实现
水箱液位控制系统的模糊PID控制，介绍了建模，算法，仿真等，十分有用。
- 2020-12-10下载
- 积分：1
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基于STM32库函数的AD9854
亲测可用，使用的都是STM32F103基本的外设资源，一般的32板子都能用，只用连接下引脚既可。可以实现定频输出，斜率扫频输出及其他模式的输出，且稳定误差小。调了好几天才算调通，配置的就那四个寄存器，重要的是时序不要错。还有个血泪教训，我用的是JTAG下载调试的，占用了B口的两个引脚，我的地址线也用到了那两个引脚导致我几天都没调出来，后来在程序里把JTAG关了就好了！！
- 2020-12-12下载
- 积分：1
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