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Effect of Magnetic Properties of Magnetic Composite Tapes on Motor Losses

Author

Listed:
  • Ryo Yoshida

    (Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan)

  • Jun Kitajima

    (Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan)

  • Takashi Sakae

    (Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan)

  • Mitsuhide Sato

    (Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan)

  • Tsutomu Mizuno

    (Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan)

  • Yuki Shimoda

    (TAMAGAWA Seiki Co., Ltd., Nagano 395-0068, Japan)

  • Akihiro Kubota

    (TAMAGAWA Seiki Co., Ltd., Nagano 395-0068, Japan)

  • Shogo Wada

    (TAMAGAWA Seiki Co., Ltd., Nagano 395-0068, Japan)

  • Teruo Kichiji

    (TAMAGAWA Seiki Co., Ltd., Nagano 395-0068, Japan)

  • Hideo Kumagai

    (TAMAGAWA Seiki Co., Ltd., Nagano 395-0068, Japan)

Abstract

Alternating current (AC) copper losses in motors increase with carrier frequency of the pulse width modulation (PWM) and are further increased by leakage flux of the permanent magnet. Therefore, AC copper losses increase with motor speed. Conventional techniques for reducing AC copper losses tend to increase other losses. In this paper, AC copper loss was reduced by wrapping a magnetic tape made of a magnetic composite material around the winding. This method controlled the flux path through the winding. Magnetic composite materials are mixtures of magnetic powders and liquid resins whose magnetic properties can be manipulated by changing the combination and other factors. When Fe–Si–Al magnetic tape was wrapped around the winding, the AC copper loss was reduced by 40%. The loss was further reduced by optimizing the magnetic properties of the magnetic composite material. The AC copper loss was maximally reduced when the specific permeability was 100 and the saturation flux density was 1.6. Magnetic tapes composed of magnetic composite materials with high saturation flux density and specific permeability reduce the AC copper losses without increasing other losses in the motor.

Suggested Citation

  • Ryo Yoshida & Jun Kitajima & Takashi Sakae & Mitsuhide Sato & Tsutomu Mizuno & Yuki Shimoda & Akihiro Kubota & Shogo Wada & Teruo Kichiji & Hideo Kumagai, 2022. "Effect of Magnetic Properties of Magnetic Composite Tapes on Motor Losses," Energies, MDPI, vol. 15(21), pages 1-16, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:7991-:d:955299
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    References listed on IDEAS

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