永磁涡流调速器工作与能耗特性分析

Analysis of Working and Energy Consumption Characteristics of Permanent Magnet Eddy Current Governor

对永磁涡流调速器的研究,目前大多重点关注调速能力特性的提高,而对其自身能效特性关注较少。实际上,永磁涡流调速器依靠感生涡流产生的磁场作为驱动力来源,其自身也是一个耗能元件,研究其能耗特性对于合理利用、达到或提高节能效果以及改进其工作性能具有重要意义。本文利用有限元电磁分析软件Ansoft Maxwell对圆盘式永磁涡流调速器进行三维建模仿真,研究其输出扭矩与转速差的关系,得出随永磁体气隙厚度改变,永磁涡流调速器传递效率保持恒定,传递效率随转速差的增加呈线性下降趋势。通过能量分析得到,永磁涡流调速器输入与输出功之差等于耗散的热量且永磁涡流调速器自身能耗正比于输入功率。

For the academic research of permanent magnet eddy current governor, nowadays,the most focus on the improvement of speed regulation capability,but concern less on its own energy efficiency;Technical renprots introduce more about the effect of energy saving, less about its own energy consumption. In fact,the permanent magnet eddy current governor relies on the magnetic field generated by the induced vortex as a source of driving force and itself is a consumable element. It is important to study its energy consumption characteristics for rational use, to achieve or improve energy efficiency and to improve its work performance.In this paper, we use the finite element electromagnetic analysis software Ansoft Maxwell for three-dimensional modeling and simulation, for the disc-type permanent magnet eddy current governor, we study the relationship between output torque and speed difference. Through simulation, when permanent magnet air gap changes, the transmission efficiency of the permanent magnet eddy current governor is constant, and the transmission efficiency is declining with the increasing of the speed difference. The transmission efficiency and the speed difference are linear. Through the analysis of power consumption, the difference between the input power and the output power of the permanent magnet eddy current governor is exactly equal to the heat dissipation. The energy consumption of the permanent magnet eddy current governor is proportional to the input power.