Loss reduction of outer-rotor type high-speed interior permanent magnet motors

Sho Sakurai; Kenji Nakamura

doi:10.3233/JAE-209399

Loss reduction of outer-rotor type high-speed interior permanent magnet motors

Sho Sakurai, Kenji Nakamura

ENG - Management Science and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Many communication servers are being installed in order to develop information technology (IT). The servers require not only high-performance processer but also its cooling system. Among the cooling systems, a cooling fan is the most suitable due to good balance between performance and cost. In order to further improve the fan's performance, both torque and speed of cooling fan motors are increased. However, iron loss and eddy current loss are also increased along with larger torque and higher speed, which worsens the efficiency. This paper investigates the optimum rotor structure for the fan motor in order to obtain sinusoidal flux distribution in air gap, which can reduce the iron and eddy current losses.

Original language	English
Pages (from-to)	861-868
Number of pages	8
Journal	International Journal of Applied Electromagnetics and Mechanics
Volume	64
Issue number	1-4
DOIs	https://doi.org/10.3233/JAE-209399
Publication status	Published - 2020

Keywords

cooling fan
Halbach array
IPM motor

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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AU - Sakurai, Sho

AU - Nakamura, Kenji

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AB - Many communication servers are being installed in order to develop information technology (IT). The servers require not only high-performance processer but also its cooling system. Among the cooling systems, a cooling fan is the most suitable due to good balance between performance and cost. In order to further improve the fan's performance, both torque and speed of cooling fan motors are increased. However, iron loss and eddy current loss are also increased along with larger torque and higher speed, which worsens the efficiency. This paper investigates the optimum rotor structure for the fan motor in order to obtain sinusoidal flux distribution in air gap, which can reduce the iron and eddy current losses.

KW - cooling fan

KW - Halbach array

KW - IPM motor

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