本文针对全数字直流调速器回路、应用自适应原理，通过数学推导，得出了速度环、电枢电压环、电枢电流环的数学模型。
According to the loops of the total digital DC timing and applied self-adaptive principles, deduce the mathematic model of the speed, armature voltage and armature electrical current loops.
结合实际情况对以PLC为内核的全数字直流调速器电能驱动，进行了起重机的工作机构和电器系统改造实现电器系统无触点控制。
The paper introduces how to design the PLC non - contact control system in rebuilding electrical system of crane, on the basis of a practical example.
介绍了应用人机对话技术、PLC和全数字直流调速器，对依靠调整减速箱挡位来设定钢丝绳生产捻距和筐篮转速的老式机械传动的合绳机进行改造。
Applying interactive interface, PLC and full digital DC speed adjusting system to update old mechanical closer that use gearbox Settings to change the layer of wire rope and the speed of cage.
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