针对目前MSP430单片机实验装置较少、实验内容少,而且无MSP430高端产品的实验装置,研制了基于MSP430F5529单片机的综合实验装置,主要包括MSP430 Launch Pad和母板两部分。较传统的单片机实验装置增加了模拟电路的设置,设计的实验能够利用单片机的所有外设,可进行模块基础实验和综合实验两大类实验,非常适合自动化和电气信息类大学生学习使用。Concerning with the lack of experimental equipment and content based on MSP430,and especially,the experimental equipment of MSP430 senior products,an experimental equipment based on MSP430F5529 microcontroller is developed. It mainly consists of two parts： MSP430 Launch Pad and main board. Compared with traditional microcontroller experiment equipment,a few analog circuits were added. The experiment we set up takes advantage of all microcontroller peripherals. Students can do two kinds of experiments： module experiment and complex experiment.Therefore it fits university students in automation and electrical major very well.
标签： msp430f5529 单片机
上传时间： 2022-04-13
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介绍了构成IGBT驱动电路的基本要求，分析光耦驱动门极电路原理及理论计算，阐述了采用光耦驱动产生米勒效应的原理。最后，给出了消除米勒效应的方法以及通过实验验证了消除米勒效应的效果。
上传时间： 2022-04-15
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主要介绍前置放大器的降噪技术、低噪声降噪的设计与制作及评价、电流输入放大器的设计、负反馈电路的解析与电路仿真、差动放大器技术、隔离放大器，附录：隔离放大器的试制；下册为滤波器电路部分，主要涉及滤波器的概述、RC滤波器与RC电路网的设计、有源滤波器的设计、LC滤波器的设计、LC仿真型有源滤波器的设计、使用于滤波器的RCL、变压器的活用、共模扼流圈与噪声对策、锁定放大器的原理与实验、锁定放大器的使用方法等。
上传时间： 2022-04-16
上传用户：zhaiyawei
为了提高超高频RFID系统中阅读器在低信噪比的情况下仍具有较高的识别能力,提出一种基于FPGA系统结合软件无线电方法实现超高频RFID射频前端电路方案。超高频射频识别系统必须符合EPC Class 1generation 2标准,所设计的电路系统以Xilinx公司的XC6SLX16-2CSG324FPGA芯片为硬件基础,将数字基带调制解调和中频滤波电路在FPGA系统中设计实现,重点阐述了射频前端电路的设计结构、AD/DA转换电路,以及数字滤波器的设计。实验结果表明,所设计的超高频RFID阅读器简化了前端电路系统结构,提升了稳定性,增强了抗干扰能力。该电路系统在信噪比较低的情况下,能够较好地实现915MHz频率的射频接收和发送。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...
标签： 915mhz 超高频 rfid 阅读 射频 前端 电路 设计
上传时间： 2022-04-17
上传用户：shjgzh
感应加热电源运行过程中由于负载的工作特性随温度变化,为了提高电能传输到负载的效率,保证负载工作在串联谐振状态,需要实现对负载的频率跟踪.通过对负载的频率跟踪有效地减少了功率开关器件的开关损耗,实现了零电压开通.本文首先介绍了串联谐振的感应加热电源的主电路结构,采用IGBT作为功率开关器件.其次介绍了锁相环电路,阐述了其结构和工作原理.最后提出了基于SG3525的频率跟踪电路,经过实验证明此电路工作稳定、可靠,现以投入到实际产品中.
上传时间： 2022-04-21
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随着世界对环境的保护力度加大,大力推出新能源产业的发展,以及电力电子技术、集成电路设计和半导体技术快速发展,兼容更宽范围低输入电压的充电机越来越受到关注,因此低压宽输入电压范围的buck-boost电源应用越来越广泛,对开关电源控制芯片提出了更高的要求,因此本文基于LT8705控制芯片设计一款高效锂电池充电电路的设计,依据实验结果,该电源模块实现了预期功能,达到了性能标准,满足需求。
上传时间： 2022-04-22
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为适应双向DC/DC功率变换的电流采样需求,一种高精度高边电流采样电路被提出。其基本思想是在功率电路的高边串入采样电阻,借助电流镜原理并引入偏置电流电路,将双向电流均转换为正向电压输出。通过理论分析与仿真结合的方法对电流镜采样原理及4种不同的偏置电流电路方案进行对比,最后通过实验数据验证了高精度高边电流采样电路的有效性。实验数据表明,该采样电路可在-25~75℃的温度工作范围内,针对-10~＋10 A范围内的电流采样实现优于5%的采样精度。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...
上传时间： 2022-04-22
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本系统基于电磁谐振技术设计了24w无线充电系统，充电距离可达3cm，充电效率81％，系统采用串联一串联的电容补偿方式，实现谐振。本文介绍了整体系统原理及系统主电路电路图，同时对电路进行了等效电路的仿真，为控制给出一定的依据，最后给出了仿真和实验的波形。
标签： 无线充电系统
上传时间： 2022-04-24
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超声波换能器作为一种实用的检测手段，能实现声波所携带的信息和电能之间转换。它的性能优良，价格低廉，操作方便，易于调试，因此在工农业生产中发挥着重要的作用。但目前换能器驱动电路的发射频率多为40 kHz，本文针对1 MHz的超声波换能器电路进行了设计，主要介绍了它的发射驱动电路和接收驱动电路的设计方案，并对它们的功能进行了详细地说明。最后搭建实验平台，并对电路的输入、输出模块进行了测试。实验结果表明，换能器电路运行良好，可以为超声波高精度测量领域的应用提供参考。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...
上传时间： 2022-04-28
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针对交流电路过零检测电路存在结构复杂、过零点检测不准确、编程繁琐等问题，设计了一种基于LM339的硬件结构简单的过零检测电路。通过仿真软件Mulisim对该设计电路进行了仿真，实验证明了该方案过零检测的可行性、稳定性和可靠性，可直接作为交流电路中CPU的过零信号。Aiming at the problems of AC cilsuit zero crossing detection circuit such as complex structure, zero crossing detection and cumbersome programming, a zero crossing detection circuit with simple hardware structure based on LM339 was designed. The design circuit was simulated by simulation software Mulisim, and the feasibility, stability and reliability of zero crossing detection were proved by experiments, which can be used as zero crossing signal of CPU in AC circuit directly.
上传时间： 2022-05-03
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