Design Of Digital And Reliable Synchronous Motor Exciting System Based On Cygnal51

Excitation system is an important part of synchronous motor running system , it affects the operating characteristics of motor directly. With the development of large-scale integrate circuit technology and computer technology, microcomputer-based excitation controller will become the main stream of excitation controllers in the future. Constant improvement in excitation control method set an even higher requirement for the computation of the microcomputer-based excitation controller. According to this requirement, the paper studies the Cygnal51-based excitation controller by using Cygnal51F020 as the control center.Firstly, this paper introduces the developing tendency of excitation controller, including the development of hardware and control method microcomputer-based excitation controller's hardware structure and requirement of excitation control method to hardware Secondly, this paper also introduces the development, feature and application range of Cygnal51 and illustrates Cygnal51's performance advantage compared with the other singlechips or general-purpose processors. Finally, this paper deals with the design of the Cygnal51-based excitation controller's hardware and the flowchart and realization method of its software from the aspects of I/O channel, formation and phase-shifting of the trigger pulse, signal synchronous and human-machine interface. The Cygnal51-based excitation controller adopts many advanced technologies, such as safeguarding trigger pulse, digital pulse and graphic LCD displaying etc. Because of the adoption of these advanced technologies, the excitation controller's structure is simple, performance is reliable and its operation convenient.The Cygnal51-based excitation controller has been tested on the synchronous motor. Results of the test shows that all functions of the excitation controller are efficient.