Purpose

To improve the power density and generation efficiency of the tubular permanent magnetic linear generators (TPMLGs) under realistic sea-stator condition, a TPMLG with 120° phase belt toroidal windings (120°-TPMLG) for wave energy conversion is proposed in this paper.

Design/methodology/approach

First, the structure of the 120°-TPMLG is introduced and its operation principle is analyzed. Second, the design process of the 120°-TPMLG is described. Meanwhile, the finite-element models of the 120°-TPMLG and the TPMLG with traditional fractional pitch windings (T-TPMLG) are established based on the similar overall dimensions. Then, the electromagnetic characteristics of the 120°-TPMLG are analyzed, such as air gap flux density, back electromotive force and load voltage. Finally, a comparative analysis of the magnetic flux density, flux linkage, load and no-load performance of the two generators are conducted.

Findings

The result shows that the 120°-TPMLG has higher power density and generation efficiency than the T-TPMLG.

Originality/value

This paper proposes a TPMLG with 120° phase belt toroidal windings (120°-TPMLG) to improve the power density and generation efficiency.

中文翻译：

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120°相带环形绕组管状永磁直线发电机设计与分析

目的

为了提高管状永磁线性发电机（TPMLG）在现实海定子条件下的功率密度和发电效率，本文提出了一种具有120°相带环形绕组（120°-TPMLG）的用于波浪能转换的TPMLG。

设计/方法/方法

首先介绍了120°-TPMLG的结构并分析了其工作原理。其次，描述了 120°-TPMLG 的设计过程。同时，基于相似的外形尺寸，建立了120°-TPMLG和具有传统分数节距绕组的TPMLG（T-TPMLG）的有限元模型。然后，分析了120°-TPMLG的电磁特性，如气隙磁通密度、反电动势和负载电压。最后，对两种发电机的磁通密度、磁链、负载和空载性能进行了对比分析。

发现

结果表明，120°-TPMLG 比 T-TPMLG 具有更高的功率密度和发电效率。

原创性/价值

本文提出了一种具有 120° 相位带环形绕组 (120°-TPMLG) 的 TPMLG，以提高功率密度和发电效率。