Based On Computer-controlled Linear Motor Drive System

After the period of 90's, Science technology is changing quickly, Especially, because of the development of computer science, micro-electronics, and modern control theory, Electrical Machinery and its interrelated subjects develop swiftly and violently. It is feasible and inevitable that digital control method has been taking the place of analog control method in this field. At the same time, The technology about the linear motor is widely used in the precise location field. Especially, with the requirement of the digital controlled machine tools increasing, The hyper speed, the hyper precision, the hyper reactivity, what is called zero mechanical gearing control theory, are easy to put in practice for the linear motor's servo system.Compared with the conventional rotary motor and scroll lever, the linear motor's servo system has removed the bad effects which are caused by the mechanical gearing. But it adds the difficulties in the aspect of electrical control. We should stand a higher level and take deeper consideration about some disturbs or some uncertain factors in situation of higher precision and tinier process. Otherwise, Zero mechanical gearing has nonsense. So we should take more effective control technologies, Such as using the Digital Signal Processing Chip, adopting Voltage Sinusoid Pulse Width Modulation, Voltage Space Vector Pulse Width Modulation, Adaptive Control, Neural Control, Fuzzy Control. In order to get higher efficiency, It is worth replacing some big and heavy mechanical components by the micro-electronics and software method.This paper presents a type of Electroplate Production-line System which drives by linear induce motors and describe the entire control system The new system is controlled by Digital Signal Processing Chip (DSP). Because there isn't middle transmission equipment in the system, in its performance in the noises and themechanical frictional waste, it is a more superior way than the traditional one, which is driven by rotary motor. The system was designed in module. And this make theperformance of the control system improved prominently and the function of thesystem can be extended or reduced conveniently.First, this paper introduces the basic principle, the development, the category of linear motor and its control technology. Second, expatiates the principle of Digital Signal Processing, Voltage Sinusoid Pulse Width Modulation, Voltage Space Vector Pulse Width Modulation. Third, realizes the logical control subsystem and the driven control subsystem, designs and write some programs.Finally, this paper summarizes the research course and advances the prospect of the project.