新型定子双馈双凸极永磁电机研究

研究了一种新型定子双馈双凸极永磁电机，该电机采用定子双馈形式，也就是定子上既有电枢绕组，又有励磁绕组，特别是在永磁体旁边附加了一条并联磁分路，通过磁分路磁阻的适当设计，可以达到用较小的直流励磁磁势获得较大气隙磁通调节范围的目的。本文介绍了样机的结构特点，分析了气隙磁通调节范围、直流励磁磁势和并联磁分路磁阻三者之间的关系，进行了样机磁场的有限元计算，样机试验与设计吻合。该电机结构新颖，励磁控制简单，调磁效果明显，励磁损耗小，具有较高的研究和实用价值。

STUDY ON A NOVEL DOUBLY SALIENT PERMANENT-MAGNET MACHINE WITH THE DOUBLY-FED STATOR

A novel doubly salient permanent-magnet machine with a doubly fed stator is studied in this paper. In this machine, not only the doubly-fed stator, which means there are armature winding and field winding placed in the stator, is adopted, but also an additional paralleled magnetic sub-path aside from the permanent-magnetic bodies is put forward. By the suitable design of the reluctance of the paralleled magnetic sub-path, a large adjustable flux range can be achieved easily with small field MMFs. The special structure of the prototype is introduced; the relationship among the adjustable flux range, the field MMFs and reluctance of the paralleled magnetic sub-path is analyzed; and the magnetic field is calculated by finite element method. Experimental results coincide with the design. There are many advantages of the design, such as novel structure, simple field control, notable adjustable flux range, and small field loss.