Affiliations: [a] Pukyong National University, Yong dang dong, Nam gu,
Busan, South Korea | [b] Dong A University, Ha dan 2 dong, Sa ha gu, Busan,
South Korea | [c] Kunsan National University, Mi ryong dong, Kunsan,
South Korea | [d] KETI, No.208, 1110-11, Oryong dong, Buk gu, Gwangju,
South Korea
Correspondence:
[*]
Corresponding author: Yunhyun Cho, Dong A University, Ha dan 2
dong, Sa ha gu, Busan, South Korea. E-mail: cogging@pknu.ac.kr
Abstract: This paper focuses on the improvement of the torque characteristics
of the outer rotor direct drive permanent magnet wind generator that is a
radial flux machine with output power of low speed and high torque, 3[kW]
90[rpm] by FEM and optimization. The optimization technique is used to find out
a design solution through the comparison of cogging torques according to the
shape variation such as the open slot width and the pole arc ratio. In this
technique the problem is to minimize the objective function. The automatic
process that includes the automatic ACAD file drawing and mesh generation with
regard to the shape variation is also used. The revised generator is obtained
from a preliminary model. The cogging torque characteristics of the revised
model and the preliminary model and the dynamic characteristics are analyzed.
From the simulation results, it is shown that the cogging torque characteristic
of the revised model is better than that of the preliminary one. The prototype
was manufactured and the simulation result such as induced voltage is agrees
with that of the experimental one.
