Design and analysis of a direct-drive wind power generator with ultra-high torque density

Jian, Linni; Shi, Yujun; Wei, Jin; Zheng, Yanchong

2015-05-07

10.1063/1.4908021

JOURNAL OF APPLIED PHYSICS   影响因子和分区

0021-8979

1089-7550

In order to get rid of the nuisances caused by mechanical gearboxes, generators with low rated speed, which can be directly connected to wind turbines, are attracting increasing attention. The purpose of this paper is to propose a new direct-drive wind power generator (DWPG), which can offer ultra-high torque density. First, magnetic gear (MG) is integrated to achieve non-contact torque transmission and speed variation. Second, armature windings are engaged to achieve electromechanical energy conversion. Interior permanent magnet (PM) design on the inner rotor is adopted to boost the torque transmission capability of the integrated MG. Nevertheless, due to lack of back iron on the stator, the proposed generator does not exhibit prominent salient feature, which usually exists in traditional interior PM (IPM) machines. This makes it with good controllability and high power factor as the surface-mounted permanent magnet machines. The performance is analyzed using finite element method. Investigation on the magnetic field harmonics demonstrates that the permanent-magnetic torque offered by the MG can work together with the electromagnetic torque offered by the armature windings to balance the driving torque captured by the wind turbine. This allows the proposed generator having the potential to offer even higher torque density than its integrated MG. (C) 2015 AIP Publishing LLC.

SCI ; EI

英语

第一 ; 通讯

Science and Technology Innovation Committee of Shenzhen, China[GJHS20120702090748648] ; Science and Technology Innovation Committee of Shenzhen, China[JCYJ20130401170306803] ; Science and Technology Innovation Committee of Shenzhen, China[KQCX20140522151322948]

Physics

Physics, Applied

WOS:000354984100060

AMER INST PHYSICS

20150900577090

Energy conversion ; Magnetism ; Torque ; Wind power ; Wind turbines ; Winding

Energy Conversion Issues:525.5 ; Wind Power (Before 1993, use code 611 ):615.8 ; Materials Handling Methods:691.2 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Electric Components:704.1 ; Physical Properties of Gases, Liquids and Solids:931.2

PHYSICS

Web of Science

South Univ Sci & Technol China, Dept Elect & Elect Engn, Shenzhen, Peoples R China

Jian, Linni,Shi, Yujun,Wei, Jin,et al. Design and analysis of a direct-drive wind power generator with ultra-high torque density[J]. JOURNAL OF APPLIED PHYSICS,2015,117(17).

Jian, Linni,Shi, Yujun,Wei, Jin,&Zheng, Yanchong.(2015).Design and analysis of a direct-drive wind power generator with ultra-high torque density.JOURNAL OF APPLIED PHYSICS,117(17).

Jian, Linni,et al."Design and analysis of a direct-drive wind power generator with ultra-high torque density".JOURNAL OF APPLIED PHYSICS 117.17(2015).