TY - GEN
T1 - Reduction in Eddy Current Loss of Concentrated Windings in High-power Density IPMSM Using Rectangular Windings
AU - Kajii, Shinnosuke
AU - Takemoto, Masatsugu
AU - Jikumaru, Takehiro
AU - Suzuki, Fuminori
AU - Ogasawara, Satoshi
AU - Orikawa, Koji
N1 - Funding Information:
ACKNOWLEDGMENT This work is supported by Grants from New Energy and Industrial Technology Development Organization (NEDO), Japan.
Publisher Copyright:
© 2021 IEEE.
PY - 2021/3/10
Y1 - 2021/3/10
N2 - Researches on more electric aircraft (MEA) are actively conducted. It is necessary for realizing MEA to meet aircraft application requirements: high ability, high availability, and high-power density, while aiming to reduce weight and environmental impact. For example, interior permanent magnet synchronous motors (IPMSMs) are expected to be used for aircraft applications of MEA, because IPMSMs can achieve both high-power density and high efficiency at high speed and high torque area compared to other types such as induction motors. In general, IPMSMs with concentrated winding structure are available to utilize limited space effectively. Rectangular windings allow high winding factor and realizing more high-power density motors, whereas eddy current loss in rectangular windings is much higher than that in round windings. In this paper, high-power density concentrated winding IPMSMs that employ rectangular windings are discussed. We have examined three improvements for a reduction of the eddy current loss in the rectangular windings to attain continuous operation with high-power density in this motor. In order to reduce the eddy current loss in the windings situated in front of the rotor, we adopted an asymmetric tooth-tip. Moreover, an adequate groove shape between tooth and stator yoke allows to reduce the eddy current loss in stator yoke side windings. Windings, which have optimized unequal cross-sectional area, offer to reduce whole winding loss. Finally, we present a proposed motor employing the three improvements.
AB - Researches on more electric aircraft (MEA) are actively conducted. It is necessary for realizing MEA to meet aircraft application requirements: high ability, high availability, and high-power density, while aiming to reduce weight and environmental impact. For example, interior permanent magnet synchronous motors (IPMSMs) are expected to be used for aircraft applications of MEA, because IPMSMs can achieve both high-power density and high efficiency at high speed and high torque area compared to other types such as induction motors. In general, IPMSMs with concentrated winding structure are available to utilize limited space effectively. Rectangular windings allow high winding factor and realizing more high-power density motors, whereas eddy current loss in rectangular windings is much higher than that in round windings. In this paper, high-power density concentrated winding IPMSMs that employ rectangular windings are discussed. We have examined three improvements for a reduction of the eddy current loss in the rectangular windings to attain continuous operation with high-power density in this motor. In order to reduce the eddy current loss in the windings situated in front of the rotor, we adopted an asymmetric tooth-tip. Moreover, an adequate groove shape between tooth and stator yoke allows to reduce the eddy current loss in stator yoke side windings. Windings, which have optimized unequal cross-sectional area, offer to reduce whole winding loss. Finally, we present a proposed motor employing the three improvements.
KW - asymmetric tooth-tip
KW - high power density motor
KW - IPMSM
KW - rectangular winding
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U2 - 10.1109/ICIT46573.2021.9453692
DO - 10.1109/ICIT46573.2021.9453692
M3 - Conference contribution
AN - SCOPUS:85112579040
T3 - Proceedings of the IEEE International Conference on Industrial Technology
SP - 221
EP - 227
BT - Proceedings - 2021 22nd IEEE International Conference on Industrial Technology, ICIT 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 22nd IEEE International Conference on Industrial Technology, ICIT 2021
Y2 - 10 March 2021 through 12 March 2021
ER -