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步进电机的特点之一,是它的启动频率比运行频率要低得多.在自控系统中,采用步进电机做速度执行元件时,其转速往往只能在起动频率以下运行.对于频繁启动、停止和变速的场合尤为如此.为了提高步进电机的工作速度,需要在驱动电路中引入加速装置.这样做的结果,既增加了设备费用,又降低了可靠性.应用微电脑控制步进电机变速,不但可以避免上述缺点,而且在大多数情况下都能使造价大大降低.本文介绍一种用TP-801单板机实现三相步进电机正反转、加减速和自动变速的应用系统.步进电机的环形分配器和汇编程序一起固化在EPROM中.
One of the characteristics of the stepper motor is that its starting frequency is much lower than the operating frequency.In the automatic control system, when the stepper motor is used as the speed executing element, its speed usually can only be operated under the starting frequency. , Especially in the case of stop and speed change.In order to improve the working speed of the stepping motor, the acceleration device needs to be introduced in the driving circuit, which not only increases the equipment cost but also reduces the reliability.Application of microcomputer control stepper motor Variable speed, not only can avoid the above shortcomings, but also in most cases can make the cost greatly reduced.This article describes a TP-801 single-board machine with three-phase stepper motor forward and reverse, acceleration and deceleration and automatic transmission system The stepper motor ring distributor is assembled with the assembler in EPROM.