New core structure and manufacturing method for high efficiency of permanent magnet motors

Author

Akita, Hiroyuki ; Nakahara, Yuji ; Miyake, Nobuaki ; Oikawa, Tomoaki

Author_Institution

Manuf. Eng. Center, Mitsubishi Electr. Corp., Amagasaki, Japan

Volume

1

fYear

2003

fDate

12-16 Oct. 2003

Firstpage

367

Abstract

This paper presents a new core structure we call "a joint-lapped core" for a permanent magnet motor. Since the joint-lapped core can be deformed into a suitable form to winding, the wires aligned and a high space factor is achieved (75%). Furthermore, it is clarified that circularity and rigidity of the joint-lapped core are improved to the same grade as a nonseparate core by shrink-fit in a frame. As a result of applying this core to the motor for compressors, efficiency is improved by 2.6 point at the maximum compared with the motor with nonseparate core.

Keywords

machine windings; magnetic cores; permanent magnet motors; compressors; core structure; efficiency improvement; high efficiency; high space factor; joint-lapped core; manufacturing method; motor; nonseparate core; permanent magnet motors; wires alignment; Automobile manufacture; Cities and towns; Coils; Compressors; Copper; Magnetic cores; Permanent magnet motors; Productivity; Pulp manufacturing; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the

Print_ISBN

0-7803-7883-0

Type

conf

DOI

10.1109/IAS.2003.1257527

Filename

1257527