Brushless dc motor with large air gap

被引：0

作者：

Nakamura, Y

Mochizuki, M

Ishibashi, F

机构：

来源：

ELECTRICAL ENGINEERING IN JAPAN | 1998年 / 125卷 / 03期

关键词：

brushless dc motor; large air gap; numerical analysis; FEN; performance analysis;

D O I：

10.1002/(SICI)1520-6416(19981130)125:3<67::AID-EEJ8>3.3.CO;2-R

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：

The authors propose a new brushless de motor for pumps, with a large air gap of 8 mm, compared with the conventional gap of 1 mm. The conventional pump system is composed of an induction motor, a magnetic coupling, and a magnetic rotor with vane. This rotor receives power from the magnetic coupling. In the new motor, the rotor has a vane without magnetic coupling. The air gap is very large in order to provide a seal between the stator and rotor. The seal protects the stator coil against liquids such as water and chemicals. The performance of the motor was analyzed by FEM and compared with experimental results. The analytical results agreed with experimental results with good accuracy. In the experiments using a four-pole 0.75-kW test motor and high-efficiency drive inverter with power factor control, the motor efficiency was about 88%, and the motor power factor was about 98%. (C) 1998 Scripta Technica, Electr Eng Jpn, 125(3): 67-74, 1998.

引用

页码：67 / 74

页数：8