本份为全套设计,包括,任务书,开题报告,外文翻译,设计图,论文,和所有材料,正文字数:18014,页数:53
论文编号:JD1073
摘要
电磁采暖炉是采用中频感应加热技术，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。电磁采暖炉采用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。逆变器主要由单片机控制74LS686产生PWM波控制四个IGBT的开通和关断。设计中采用的芯片主要是单片机89C52和74LS686PWM波产生器，由于EXB841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。设计过程充分利用了89C52的控制性能，控制系统不仅响应速度快且具有理想的控制精度。
关键词：IGBT 逆变器 电磁采暖
Abstract
Electromagnetic heating stove is used induction heating technology.The Intermediate Frequency Induction Heating has been widely applied in melting,casting,bend,hot forging,welding.Surface Heat Treatment due to its advantages of high heating efficiency、Improving rapidly、easily controlled、easily being mechanized and automated. IGBT electromagnetic heating boiler used as switching devices, which can work in 10 Hz - 10 kHz frequency band.It consists of rectifier,filter,and the inverter components.Controlled Rectifier is not used the entire three-phase bridge rectifier circuit.Filter is used by an electrolytic capacitor and inductor components II-type filter and passive PFC.Inverter control mainly used by the MCU 74 LS686 generated wave PWM control for the opening four and IGBT turn-off.The main chip microcontroller 89C52 tents and 74LS686PWM wave generator is used in this design.As EXB841 with fast switching speed (500ns),optical isolator,fault state feedback.It can automatically reset, shut down automatically,and other functions,so as to choose their IGBT driver.Design process takes full advantage of the 89C52 tents control performance,control system is not only fast response but also has the ideal control accuracy.
Keywords: IGBT inverter Electromagnetic heating
目 录
1 绪论 ………………………………………………………………………………………1
1.1 电磁采暖炉的背景和意义 ……………………………………………………………1
1.2 电磁采暖炉的国内外发展趋势 ………………………………………………………2
2 电磁涡流加热及其实现方案研究 ………………………………………………………4
2.1 串并联谐振电路的比较 ………………………………………………………………4
2.2 串联谐振电源工作原理 ………………………………………………………………4
2.3 电路的功率调节原理 ……………………… ………………………………………6
2.4 本课题设计思路及主要设计内容 ……………………………………………………6
3 30KW电磁采暖炉电气控制的主电路设计 …………………………………………8
3.1 主电路的主要设计技术参数 …………………………………………………………8
3.2 主电路结构 ……………………………………………………………………………8
3.3 PID控制 ………………………………………………………………………………17
3.4 系统主回路的元器件参数设定………………………………………………………18
4 控制电路的设计…………………………………………………………………………22
4.1 单片机电路设计………………………………………………………………………22
4.2 PWM波的产生 …………………………………………………………………………24
4.3 电流互感器……………………………………………………………………………29
4.4 键盘与显示电路设计…………………………………………………………………30
5 驱动电路的设计…………………………………………………………………………32
5．1 IGBT对驱动电路的要求………………………………………………………………32
5.2 缓冲电路设计…………………………………………………………………………33
5.3 IGBT驱动芯片EXB841介绍 …………………………………………………………33
5.4 IGBT的驱动和保护电路设计…………………………………………………………35
5.5 本设计用辅助直流稳压电源…………………………………………………………36
6 软件设计…………………………………………………………………………………37
6.1 主程序流程图 …………………………………………………………………………37
6.2 子程序流程图 …………………………………………………………………………38
结论 ………………………………………………………………………………………41
致谢 …………………………………………………………………………………42
参考文献………………………………………………………………………………43
附件A………………………………………………………………………………………45
附件B………………………………………………………………………………………46
30KW电磁采暖炉电气设计......