TY - GEN
T1 - Investigation of Enhancing Output Power Density in Ultra-High-Speed Motors with Concentrated Winding Structure
AU - Iida, Takayuki
AU - Takemoto, Masatsugu
AU - Ogasawra, Satoshi
AU - Orikawa, Koji
AU - Sato, Ikuya
AU - Kokubun, Hiroyuki
AU - Toba, Akio
AU - Syuto, Masao
N1 - Publisher Copyright:
© 2020 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10/11
Y1 - 2020/10/11
N2 - Ultra-high-speed motors has frequently been considered for many applications because to increase rotational speed of motors is effective in improving output power density and reducing motor size. In this paper, a 4-pole ultra-high-speed motor with concentrated winding structure is discussed in order to achieve even higher output power density. However, applying 4-pole magnetization to conventional ultra-high-speed motors using Nd sintered permanent magnet (PM) and concentrated winding structure will extremely increase total loss, total loss density, and especially rotor loss density. Therefore, from the viewpoint of cooling and continuous operation, it is important to propose a 4-pole ultra-high-speed motor with concentrated winding structure that can achieve even higher power density without increasing the total loss density and the rotor loss density. This paper shows that there are four important key points in the motor design to realize the proposed motor. It is found that the proposed motor can accomplish 1.5 times higher output power density without increasing the total loss density and the rotor loss density than the conventional 2-pole ultra-high-speed motor with Nd sintered PM and concentrated winding structure.
AB - Ultra-high-speed motors has frequently been considered for many applications because to increase rotational speed of motors is effective in improving output power density and reducing motor size. In this paper, a 4-pole ultra-high-speed motor with concentrated winding structure is discussed in order to achieve even higher output power density. However, applying 4-pole magnetization to conventional ultra-high-speed motors using Nd sintered permanent magnet (PM) and concentrated winding structure will extremely increase total loss, total loss density, and especially rotor loss density. Therefore, from the viewpoint of cooling and continuous operation, it is important to propose a 4-pole ultra-high-speed motor with concentrated winding structure that can achieve even higher power density without increasing the total loss density and the rotor loss density. This paper shows that there are four important key points in the motor design to realize the proposed motor. It is found that the proposed motor can accomplish 1.5 times higher output power density without increasing the total loss density and the rotor loss density than the conventional 2-pole ultra-high-speed motor with Nd sintered PM and concentrated winding structure.
KW - High output power density
KW - Nd bonded magnet
KW - Rotor back core
KW - Straight teeth structure
KW - Ultra-high-speed motors
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U2 - 10.1109/ECCE44975.2020.9236419
DO - 10.1109/ECCE44975.2020.9236419
M3 - Conference contribution
AN - SCOPUS:85097138578
T3 - ECCE 2020 - IEEE Energy Conversion Congress and Exposition
SP - 262
EP - 269
BT - ECCE 2020 - IEEE Energy Conversion Congress and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Y2 - 11 October 2020 through 15 October 2020
ER -