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Description: 中频感应加热以其加热效率高、速度快，可控性好及易于实现机械化、自动化等优点，已在熔炼、铸造、弯管、热锻、焊接和表面热处理等行业得到广泛的应用。
本设计根据设计任务进行了方案设计，设计了相应的硬件电路，研制了20KW中频感应加热电源。
本设计中感应加热电源采用IGBT作为开关器件，可工作在10 Hz～10 kHz频段。它由整流器、滤波器、和逆变器组成。整流器采用不可控三相全桥式整流电路。滤波器采用两个电解电容和一个电感组成Ⅱ型滤波器滤波和无源功率因数校正。逆变器主要由PWM控制器SG3525A控制四个IGBT的开通和关断，实现DC-AC的转换。
设计中采用的芯片主要是PWM控制器SG3525A和光耦合驱动电路HCPL-316J。设计过程中程充分利用了SG3525A的控制性能，具有宽的可调工作频率，死区时间可调，具有输入欠电压锁定功能和双路输出电流。由于HCPL-316J具有快的开关速度（500ns），光隔离，故障状态反馈，可配置自动复位、自动关闭等功能，所以选择其作为IGBT的驱动。
对原理样机的调试结果表明，所完成的设计实现了设计任务规定的基本功能。此外，为了满足不同器件对功率需要的要求，设计了功率可调。这部分超出了设计任务书规定的任务。-induction heating with high heating efficiency, speed and good controllability and easy to mechanization. the advantages of automation, in melting, casting, bending, forging, welding and surface heat treatment and other industries have been widely employed. According to the design tasks for the design of the program design, design corresponding to the hardware circuit, Development of 20 KW induction heating power. The design of induction heating power IGBT used as a switching device, which can work in 10 Hz - 10 kHz frequency band. It consists of rectifier, filter, and the inverter components. Controlled Rectifier not use the entire three-phase bridge rectifier circuit. 2 filter used an electrolytic capacitor and inductor components II-type filter and passive PFC. Inverter mainly by the PW
Platform: |
Size: 5144 |
Author: wq57 |
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Description: 用AVR单片机设计的MP3播放器
功能：
MP3 Player
IDE ATA interface
FAT 32 with long file name support
USB interface
On board power supply (input from 7v to 20v DC)
Bootloader firmware upgradeable via USB port
Infrared bi-directional interface
Remote Control
Back light graphic LCD
worked with only 2x AA batteries
In sleep mode sink less than 1uA (2.5mA in active mode)
5 buttons for easy navigation
Long range (more than 20 feets)
Platform: |
Size: 882325 |
Author: 谭志成 |
Hits:
Description: 软件简介：
系统安装步骤：
1、安装IIS。
2、安装动易组件
3、双击PowerEasy2006.exe，按照提示一步步操作，完成动易系统文件的解压缩。
4、修改conn.asp文件中的数据库参数。
5、运行install.asp。
6、后台管理帐号：admin 密码：admin-software description : system installation steps : one, install IIS. 2, the installation of three components easy to move, click PowerEasy2006.exe. according to the prompt an operation step by step, moving to complete the system files easily decompress. 4, modify conn.asp document database parameters. 5, running install.asp. 6, account management background : admin password : admin
Platform: |
Size: 12700672 |
Author: jeremy |
Hits:
Description: 动易2006 sp2版的源码及破解补丁
动易大家因该都听说过吧，是一个快速建站的软件。-easy to move 2,006 sp2 edition of the source code and crack patch move because of the easy we have heard about it, Station at a fast software.
Platform: |
Size: 20720640 |
Author: shl |
Hits:
Description: 中频感应加热以其加热效率高、速度快，可控性好及易于实现机械化、自动化等优点，已在熔炼、铸造、弯管、热锻、焊接和表面热处理等行业得到广泛的应用。
本设计根据设计任务进行了方案设计，设计了相应的硬件电路，研制了20KW中频感应加热电源。
本设计中感应加热电源采用IGBT作为开关器件，可工作在10 Hz～10 kHz频段。它由整流器、滤波器、和逆变器组成。整流器采用不可控三相全桥式整流电路。滤波器采用两个电解电容和一个电感组成Ⅱ型滤波器滤波和无源功率因数校正。逆变器主要由PWM控制器SG3525A控制四个IGBT的开通和关断，实现DC-AC的转换。
设计中采用的芯片主要是PWM控制器SG3525A和光耦合驱动电路HCPL-316J。设计过程中程充分利用了SG3525A的控制性能，具有宽的可调工作频率，死区时间可调，具有输入欠电压锁定功能和双路输出电流。由于HCPL-316J具有快的开关速度（500ns），光隔离，故障状态反馈，可配置自动复位、自动关闭等功能，所以选择其作为IGBT的驱动。
对原理样机的调试结果表明，所完成的设计实现了设计任务规定的基本功能。此外，为了满足不同器件对功率需要的要求，设计了功率可调。这部分超出了设计任务书规定的任务。-induction heating with high heating efficiency, speed and good controllability and easy to mechanization. the advantages of automation, in melting, casting, bending, forging, welding and surface heat treatment and other industries have been widely employed. According to the design tasks for the design of the program design, design corresponding to the hardware circuit, Development of 20 KW induction heating power. The design of induction heating power IGBT used as a switching device, which can work in 10 Hz- 10 kHz frequency band. It consists of rectifier, filter, and the inverter components. Controlled Rectifier not use the entire three-phase bridge rectifier circuit. 2 filter used an electrolytic capacitor and inductor components II-type filter and passive PFC. Inverter mainly by the PW
Platform: |
Size: 5120 |
Author: wq57 |
Hits:
Description: 用AVR单片机设计的MP3播放器
功能：
MP3 Player
IDE ATA interface
FAT 32 with long file name support
USB interface
On board power supply (input from 7v to 20v DC)
Bootloader firmware upgradeable via USB port
Infrared bi-directional interface
Remote Control
Back light graphic LCD
worked with only 2x AA batteries
In sleep mode sink less than 1uA (2.5mA in active mode)
5 buttons for easy navigation
Long range (more than 20 feets)
-AVR single-chip design with MP3 player function: MP3 Player IDE ATA interface FAT 32 with long file name support USB interface On board power supply (input from 7v to 20v DC) Bootloader firmware upgradeable via USB port Infrared bi-directional interface Remote Control Back light graphic LCD worked with only 2x AA batteries In sleep mode sink less than 1uA (2.5mA in active mode) 5 buttons for easy navigation Long range (more than 20 feets)
Platform: |
Size: 881664 |
Author: 谭志成 |
Hits:
Description: 箱式变电站又称户外成套变电站，也有称做组合式变电站，它是发展于20世纪60年代至70年代欧美等西方发达国家推出的一种户外成套变电所的新型变电设备，由于它具有组合灵活，便于运输、迁移、安装方便，施工周期短、运行费用低、无污染、免维护等优点，受到世界各国电力工作者的重视。进入20世纪90年代中期，国内开始出现简易箱式变电站，并得到了迅速发展。
本课题的主要内容包括箱式变电站的发展应用，箱式变电站的结构分类，以及箱式变电站一次系统设计极其设备选型，二次系统设计，以及箱式变电站的智能监控系统。35kV箱式变电站的设计高压侧额定电压为35kV，低压侧额定电压为10kV，主变压器容量为5000kVA。主接线采用单母线分段接线。
-Box-type transformer substation calls again outdoor a transformer substation, also call to do the sectional transformer substation. It is a development to wait to 70 s Europe and America western prosper in the 60 s of 20 centuries the nation release a kind of outdoor the set changes to give or get an electric shock of new change to give or get an electric shock the equipments, because it have the combination vivid, easy to conveyance, move, install convenience, start construction construction the period is short and circulate the expenses low, free from pollution, do not need maintenance etc. advantage, suffer the international community electric power the worker values.Enter the middle of 90 s of 20 centuries. The domestic starts appearing the simple box-type transformer substation , and got the quick development.
The article regard box-type transformer substation as a development for relating box-type transformer substation applied, the construction of box-type transformer subst
Platform: |
Size: 71680 |
Author: lihui |
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Description: 设计了基于射频nRF2401和数字温度传感器DS18B20的无线测温报警系统。整个系统由测温发射机和显示、控制接收机组成：首先利用温度传感器DS18B20采集测温信号 ，第二步把温度信号存储在主控芯片中，通过无线射频nRF2401发送到接收机，第三步由接收机控制LCD动态显示，最后接收机控制指示灯和报警器做出相应的反应。形成无线通信、控制等功能于一体的新型系统。系统设计了简明的人机交流按键和指示灯，能够实现实时设置上下限报警温度，有效传输距离达到20-40米，测试表明其便携性与实用性兼备，工作性能良好。-Considering the low-power, small size, easy to use and so on. I design the base of RF-based nRF2401 and digital temperature sensor DS18B20 wireless temperature alarm system. The whole system composed by the transmitter and receiver. For the first, using temperature sensor DS18B20 to collect temperature signal. Second, the temperature signal is stored in the master chip and I use the adoption of radio frequency nRF2401 to send it to the host computer. Third, the host computer control LCD to dynamic display. Final, the host computer control lights and alarms to make a corresponding response. Constitute a new wireless communications, control functions system. The system was designed a simple human-computer exchanges, such as the keys and indicator lights. It is able to realize real-time alarm setting upper and lower limits of temperature, the effective transmission distance to reach 20-40 meters. Tests show that it has the portability and practicality, good performance
Platform: |
Size: 77824 |
Author: qinyu |
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Description: DHT11数字温湿度传感器是一款含有已校准数字信号输出的温湿度复合传感器。它应用专用的数字模块采集技术和温湿度传感技术，确保产品具有极高的可靠性与卓越的长期稳定性。传感器包括一个电阻式感湿元件和一个NTC测温元件，并与一个高性能8位单片机相连接。因此该产品具有品质卓越、超快响应、抗干扰能力强、性价比极高等优点。每个DHT11传感器都在极为精确的湿度校验室中进行校准。校准系数以程序的形式储存在OTP内存中，传感器内部在检测信号的处理过程中要调用这些校准系数。单线制串行接口，使系统集成变得简易快捷。超小的体积、极低的功耗，信号传输距离可达20米以上，使其成为各类应用甚至最为苛刻的应用场合的最佳选则。产品为4 针单排引脚封装。连接方便，特殊封装形式可根据用户需求而提供。-DHT11 digital temperature and humidity sensor is a calibrated digital signal output with the temperature and humidity combined sensor. It is application specific digital modules acquisition and temperature and humidity sensor technology, to ensure that products with high reliability and excellent long-term stability. Sensor includes a resistive element and a sense of wet NTC temperature components, and with a high-performance 8-bit microcontroller connected. So the product has excellent quality, fast response to anti-interference ability, high cost performance advantages. Each DHT11 sensors are extremely accurate calibration of humidity calibration chamber. Calibration coefficients stored in the OTP program memory, internal sensor, the detection signal processing to call these calibration coefficients. Single-wire serial interface system to get quick and easy system integration. Small size, low power, signal transmission distance up to 20 meters, making it the most demanding types of a
Platform: |
Size: 676864 |
Author: 陈光荣 |
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Description: 本书主要介绍了用DriverStudio 3.1开发工具开发Windows 2000/XP下的WDM设备驱动程序的原理及编程方法。本书详细介绍了WDM基本程序框架和编程，IRP的基本概念及编程，WDM和应用程序之间的通信、即插即用、电源管理、WMI的编程技术，IRP串行处理、过滤器驱动程序，WDM访问硬件设备、处理硬件中断、实现DMA操作的编程技术，以及大量的基本编程技术，还有USB接口和PCI接口设备驱动程序WDM的开发。
本书附有20个典型的编程实例，便于读者学习和掌握。
本书是一本技术性较强的工具书。本书的适用对象是具有一定计算机硬件及C++语言基础的计算机应用开发人员，是计算机应用开发人员和高等院校学生的实用参考书。
-This book introduces the development tools developed by DriverStudio 3.1 under Windows 2000/XP WDM Device Driver principles and programming. WDM book details the basic procedural framework and programming, IRP and the basic concepts of programming, WDM, and the communication between applications, plug and play, power management, WMI programming techniques, IRP serial processing, the filter driver , WDM access to the hardware equipment to handle hardware interrupts, DMA operation of achieving the programming technology, and a lot of basic programming techniques, as well as PCI interface, USB interface and WDM device driver development.
Book with 20 examples of typical programming, easy to readers to learn and master.
This book is a highly technical tool. The book is targeted with a certain computer hardware and C-based computer application developer, a computer application developers and university students practical reference book.
Platform: |
Size: 35525632 |
Author: lijianli |
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Description: 《抢滩登陆》属于即时360度全方位射击游戏，相对于同类游戏较为简单，但容量又大于普通的小游戏，玩法非常简单，很容易上手。游戏情节惊心动魄，游戏场景中变化多端的敌军、即时控制的动作都是吸引玩家的亮点。
20世纪60年代，战争的硝烟在整个欧洲大陆上弥漫，盟军在大陆上的作战陷入了胶着状态。为了牵制敌军的行动并最终取得决定性的胜利，玩家的使命就是：尽最大可能消耗敌人的入侵部队，阻止敌人的进攻。面对滩头上潮水一般涌来的敌人，唯一能依靠的就只有身后那门威力无比强大的海防炮台。
android游戏-Landing on a beach belonging to real-time 360-degree shooting game, it has a relatively simple compared to similar games, but the capacity is greater than the ordinary game play is very simple, very easy to use. The game plot thrilling, varied enemy in the game scene, real-time control actions are the highlights to attract players. 1960s, the war on the entire European continent, filled the air, the Allied forces fighting on the mainland into a stalemate. In order to pin down the enemy' s actions and ultimately to achieve a decisive victory, the player' s mission is: to the maximum extent possible consumption of the invading forces of the enemy, to prevent the enemy' s attack. The face of the enemy beachhead came flooding, only able to rely on only behind that door power of powerful coastal defense fort. android game
Platform: |
Size: 6446080 |
Author: 宋志辉 |
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