新颖高频动圈式永磁直线电机的研究

针对常规动圈式永磁直线电机在电磁力、响应时间和响应速度等性能上的不足,从永磁体结构入手,对比单个永磁体不同的磁化技术和多个永磁体不同的阵列结构,提出了一种新颖八片瓦型有气隙Halbach磁化阵列动圈式永磁直线电机。对其静态磁场和瞬态磁场的分析以及实验结果表明,线圈与永磁体间的作用力能提高40%以上,仿真频宽接近350 Hz/-3 dB,响应时间为0.004 s。而实验频宽达到300 Hz/-3 dB,与仿真结果基本吻合,表明所设计的动圈式永磁直线电机具有高频和快速响应特性,能很好地满足高速电液比例控制系统的要求。

Study of a Novel High Frequency Moving Coil Permanent Magnet Linear Motor

To improve the performance of the conventional moving coil permanent magnet linear motors,such as export force,response time and response speed,different magnetization techniques of single permanent magnet and different array structures of multiple permanent magnets were compared,and a novel moving coil permanent magnet linear motor was proposed by using eight pieces tegular Halbach magnet array with air gap.It was shown from the analysis of magnetostatic field,transient field and the experimental results of moving coil permanent magnet linear motor that the force between the coil and the permanent magnet can be increased by at least 40%,simulation frequency is close to 350 Hz at-3 dB,and response time is 0.004 s.The experimental frequency is 300 Hz at-3 dB,it is in fairly good agreement with simulation results.Results show that the designed moving coil permanent magnet linear motor possesses the characteristic of high frequency and rapid response,and can meet the requirements of a high speed electrohydraulic proportional control system.