采用初级永磁直线电机的波浪发电技术研究

Research on the Wave Power Conversion Technology Using Primary Permanent Magnetic Linear Generator

提出一种用于波浪发电的新型圆筒形初级永磁直线发电机,其次级结构简单,绕组和永磁体均位于初级。给出了发电机基本结构和组合结构,对所提出电机的基本原理进行了分析。采用瞬态有限元方法对所提出电机的空载特性和负载特性进行了仿真分析,给出了仿真结果;与传统典型的动子永磁型电机直线同步发电机进行了对比分析;并采用直线同步发电机样机验证了有限元仿真的正确性。分析结果表明所提出电机具有电压正弦度高、定位力小、转换效率高、低速发电性能好的特点,比较适合作为海浪发电机。

A novel tube primary permanent magnetic linear generator（TPPMLG） is proposed for wave energy extraction, which has a concise secondary structure, with both the permanent magnets and armature windings placed in the primary structure. This paper presents the basic structure and composite structure of the generator,and analyzes its operational principles. The transient finite element method（FEM） is employed to simulate and study the non-load and load characteristics of the generator, and derive the simulation results which are compared with the features of typical tube linear synchronism generators. A prototype of linear synchronism generator is used to verify the correctness of the FEM. The analysis results indicate that the proposed generator has the advantages of sinusoidal voltage, minor cogging force, high conversion efficiency and good performances in low-speed power generation. This kind of generator is well suitable for the application of wave energy conversion.