Abstract
With good characteristics and performance, the dc motor is widely used in the laboratory and on the precision machine tool in factory. This article according to the electric power and electronic technology and the automatically controlled theoretical, design one, it is systematic to be suitable for the speed of adjusting planed in Longmen. Adopt silicon controlled rectifier rectification device pull to what Longmen plane electrical machinery supply power mainly, have save the capacity of equipment of the voltage transformer and silicon controlled rectifier, has achieved economy, simple, easy purpose to adjust of circuit. Is it realize with Armature electric current wide to transfer in the speed range, simplify the circuit of controlling rapidly to transfer jointly. Main circuit adopt three-phase bridge parallel form instead, In exchange jobs speed systematic control circuit, that link make comparisons detailed introduction of, is it transfer speed systematic quiet, dynamic analysis of performance to offer too at the same time, provide basic system debug the method also finally. This system designs have some advantages through system control simulation test with a small amount investment, light, high efficiency, convenient for repairing and soon.