单片机数字直流电机调速
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密 惠 保
摘要
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
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[来源：http://think58.com]
[来源：http://www.think58.com]
[资料来源：THINK58.com]
[版权所有：http://think58.com]
[资料来源：http://think58.com]
Abstract
Frequency conversion that one-chip computer control transfer speed systematic design philosophy with transfer to difference frequency control. Achieve the goal of controlling rotational speed through changing the procedure . Because the motor is not big in power in the design, the rectifier can not adopt controlledly the circuit, the condenser strains waves; Going against the becoming device adopts three phases of the electric transistor to go against the becoming device. The systematic ensemble architecture is by the main return circuit mainly, drive the circuit, the photo electricity isolates the circuit, HEF4752 large scale integrated circuit, protects the circuit, the Intel series one-chip computer, Intel8253 timing /count device of,Intel8255 programmable interface chip,Intel8279 keyboard not in common use / display, I/O interface chip, CD4527 proportion frequency division device and tests the speed such composition as the generator ,etc.. Have the dependability that can make the whole system operate of measuring and protecting the circuit to have guarantee in the return circuit
[keywords] MCS-51；HEF4752；time/counter of l8253；selenium；rectifier；three phase eletromotor of asynchronism
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