用单片机制的电机交流调速系统设计.doc

摘要 文 摘 单片机控制的变频调速系统设计思想是用转差频率进行控制。通过改变程序来达到控制转速的目的。由于设计中电动机功率不大，所以整流器采用不可控电路，电容器滤波；逆变器采用电力晶体管三相逆变器。系统的总体结构主要由主回路，驱动电路，光电隔离电路，HEF4752大规模集成电路，保护电路，Intel系列单片机，Intel8253定时/记数器，Intel8255可编程接口芯片，Intel8279通用键盘/显示器，I/O接口芯片，CD4527比例分频器和测速发电机等组成。回路中有了检测保护电路就可以使整个系统运行的可靠性有了保障。 关键词 MCS-51单片机；HEF4752；8253定时器；晶闸管；整流器；三相异步电动机 Abstract Potpourri control of the microcontroller Frequency Control System is used to thinking poor frequency control. By changing the speed control procedures to achieve the objective. As the design of electrical power do not, so do not use controlled rectifier circuits, capacitors filter; inverter transistor using three-phase power inverter. The overall structure of the main system by the main circuit, driving circuit, photoelectric isolation circuit, HEF4752 large-scale integrated circuits, circuit protection, Intel MCU, Intel8253 timing / Register, Intel8255 programmable interface chip, Intel8279 GM Keyboard / monitor, I / O interface chip, CD4527 proportion of crossover components such as generators and guns. With detection circuit in the protection circuit can make the whole system running with the reliability of protection. Key words MCS-51 SCM; HEF4752; 8253 timer; SCR; rectifier; three-phase asynchronous motor 目录 引言………………………………………………………………………………………………...1 1交流调速的现状…………………………………………………………………………………3 2用单片机控制交流调速…………………………………………………………………………5 3系统设计的参数………………………………………………………………………………..12 4用单片机控制的电机交流调速系统设计……………………………………………………..12 4.1调速系统整体方案设计…………………………………………………………………….12 4.2原器件的选择……………………………………………………………………………….13 4.3系统主回路的设计及参数计算…………………………………………………………….19 4.4单元模块的设计……………………………………………………………………………..22 4.4.1 转差频率控制原理及调节器的设计…………………………………………………..22 4.4.2 PWM控制信号的产生及变换器的设计……………………………………………….24 4.4.3 光电隔离及驱动电路设计……………………………………………………………..29 4.4.4 故障检测及保护电路设计……………………………………………………………..30 4.4.5 模拟量输入通道的设计………………………………………………………………..31 4.5 系统软件设计………………………………………………………………………………...31 4.5.1 程序框图及其介绍………………………………………………………………………31 4.5.2