阀用耐高压旋转电磁铁特性研究

Characteristics of Electromagnet with High Pressure Resistance for Valve

设计了一种轴向分相结构的耐高压旋转电磁铁,通过磁路解析、数值仿真和实验研究讨论了电磁铁的矩角特性曲线以及频响和阶跃响应等静动态特性,其仿真频宽约为115 Hz/-3 dB和80 Hz/-90°,上升时间约为15 ms。为了验证理论分析的正确性,搭建了静动态特性实验平台对其进行了实验研究。结果表明该电磁铁的矩角特性近似于正弦波形,其最大静转矩达到了0.19 N.m,实验频宽达到113 Hz/-3 dB和65 Hz/-90°,上升时间约为18 ms。实验结果和仿真结果基本吻合,可以用作直动式2-D数字比例阀等的电-机械转换器。

A rotary electromagnet with high pressure resistance based on axial stator division structure was proposed. Combined with the approaches of magnetic circuit analysis, numerical simulation and experimental study, the static and dynamic characteristics of electromagnet including torque-angle relationship, frequency response and step response were studied. The simulated frequency width was 115 Hz/-3 dB, 80 Hz/-90° approximately and the simulated rise time for step response was about 15 ms. In order to validate the accuracy of theoretical results, a special test rig was built and experimental study was performed. The electromagnet has sinusoidal-like torque-angle characteristics whose maximum static torque reached about 0. 19 N · m. And its experimental frequency width was 113 Hz/-3dB, 65 Hz/-90° approximately and experimental rise time was about 18 ms. The experimental results were in a close agreement with the simulated results. The electromagnet was appropriate to be used as the electro-mechanical converter of 2-D direct-drive digital proportional valve.