Effect of Eddy Current Loss Reduction by Segmentation of Magnets in Synchronous Motors: Difference Between Interior and Surface Types

被引：83

作者：

Yamazaki, Katsumi ^{[1
]}

Shina, Masayuki ^{[1
]}

Kanou, Yuji ^{[1
]}

Miwa, Masashi ^{[2
]}

Hagiwara, Jun ^{[2
]}

机构：

[1] Chiba Inst Technol, Chiba 2750016, Japan

[2] TDK Corp, Chiba 2728558, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2009年 / 45卷 / 10期

关键词：

Eddy current; finite-element method (FEM); Nd-Fe-B magnet; synchronous motor; CARRIER HARMONICS;

D O I：

10.1109/TMAG.2009.2024159

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this study, we investigate the effect of eddy current loss reduction by segmented rare-earth magnets that are used in synchronous motors driven by inverters. First, the difference in the loss-reduction effect due to the rotor shape is estimated by the 3-D finite-element analysis that considers the carrier harmonics of the inverter. The results are compared to the theoretical solution. Next, a basic experiment using magnet specimens is carried out in order to confirm the calculated results. It is clarified that most of the magnet eddy current losses in the analyzed motors are caused by the carrier harmonics of the inverter and that the loss-reduction effect of the segmented magnet in the case of the interior permanent magnet motor decreases when it is compared to that of the surface permanent magnet motor. This phenomenon is mainly caused by the increase in the reaction field by the high-frequency harmonic eddy currents.

引用

页码：4756 / 4759

页数：4

共 5 条

[1] Simulations and experiments on eddy current in Nd-Fe-B magnet [J].