Research about Vacuum Simulation of Permanent Magnet Linear Motor、Drive Controller and the Protection

　　Research about Vacuum Simulation of Permanent Magnet Linear Motor、Drive Controller and the Protection
　　Principle, static attraction, dynamic feature of Breaker with linear motor drive is analyzed. This setup has the virtue of simple structure , reliable performance, smoothly drive, small oscillation, long motion and so on ,which can be widely used in electric switch , breaker and so on . Static flux is computered by FEM widely by now , static force of permanent magnet only used http://www.999magnet.com/products/112-neodymium-standard-state and attraction of both exited current and permanent magnet used are analyzed and computered . This section mainly analyze three structures: three kinds of structures have been analyzed with FEM. Result indicates that C structure has better electromagnetic performance . Magnetic field and force of linear synchronous motor drive are analyzed . A brief introduction and design of linear motor drive are presented . Model and control strategy of hybrid excitation linear synchronous motor is discussed, drive control system is designed and experimented, whose steady current and voltage waveform are measured . This paper have carried on a brief introduction vacuum switch permanent magnetism straight line motor-driven system’s monitor and the maintenance. The processing method has been taken when breakdown of vacuum switch permanent magnetism straight line motor-driven system occurs. At last, the advantage and disadvantage of the design are summarized ,future and spread of the research are forecasted .