Abstract

For efficiency improvement and miniaturization of electric motor to be equipped in hybrid electric vehicle, lap winding was adopted as winding type of stator and reduction of thickness and loss of the motor was achieved. Three nozzles are utilized to wind from the outer circumference around I-shaped split cores, enabling the length of the braided winding overhang to be minimized, reducing the length of the winding. The use of multi-hole alignment nozzles and a jig for fixing the winding has increased the space factor. In addition, employing a two-step stamping process in which the first load is applied to increase the internal diameter and the second is applied in the axial direction has enabled the height of the winding overhang to be limited to 10mm. These have increased operation efficiency by 7%.

References

1. (1) Baba, K., Oikawa, T., Akita, H., Kometani, H., Kawaguchi, H.: Examination of Performance Improvement Brushless DC Motors, IEE Japan, RM-00-141 (2000)
2. (2) Ikkai, Y., Nishiyama, N., Kishibe, T., Kondo, Y., Kadoya, N.: A Split-core Concentrated Winding IPM Motor for an EV, JEVA EV Forum, p. 199-206 (2000)
3. (3) Akita, H., Hirai, Y., Kawaguchi, S., Kawaguchi, H.: Conserving Energy and Achieving High Efficiency in an Air-conditioner Compressor Motor, Mitsubishi Electric Technical Review, Vol. 75, No. 10, p. 25-28 (2001)

Author (organization or company)

• Hirofumi ATARASHI（Tochigi R&D Center）
• Mitsuyoshi TAKAO（Tochigi R&D Center）
• Takeo FUKUDA（Tochigi R&D Center）
• Toshinori TSUKAMOTO（Tochigi R&D Center）

Publication Information

Article of Honda R&D Technical Review Vol.15 No.2 (79 - 84)

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Citation Information