可変速特性に優れた電気自動車用永久磁石式リラクタンスモータの開発

  • 堺 和人
    (株)東芝 電力・産業システム技術開発センター
  • 高橋 則雄
    (株)東芝 電力・産業システム技術開発センター
  • 霜村 英二
    (株)東芝 電力・産業システム技術開発センター
  • 新 政憲
    (株)東芝 電力・産業システム技術開発センター
  • 中沢 洋介
    (株)東芝 電力・産業システム技術開発センター
  • 田島 敏伸
    (株)東芝 自動車システム技術開発センター

書誌事項

タイトル別名
  • Development of Permanent Magnet Reluctance Motor Suitable for Variable-Speed Drive for Electric Vehicle
  • カ ヘンソク トクセイ ニ スグレタ デンキ ジドウシャヨウ エイキュウ ジシャクシキ リラクタンスモータ ノ カイハツ

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抄録

Regarding environmental and energy issues, increasing importance has been placed on energy saving in various systems. To save energy, it would be desirable if the total efficiency of various types of equipment were increased.Recently, a hybrid electric vehicle (HEV) and an electric vehicle (EV) have been developed. The use of new technologies will eventually lead to the realization of the new- generation vehicle with high efficiency.<BR>One new technology is the variable-speed drive over a wide range of speeds. The motor driving systems of the EV or the HEV must operate in the variable-speed range of up to 1:5. This has created the need for a high-efficiency motor that is capable of operation over a wide speed range. <BR>In this paper, we describe the concept of a novel permanent magnet reluctance motor (PRM) and discuss its characteristics. We developed the PRM, which has the capability of operating over a wide speed range with high efficiency. The PRM has a rotor with a salient pole, which generates magnetic anisotropy. In addition, the permanent magnets embedded in the rotor core counter the q-axis flux by the armature reaction. Then, the power density and the power factor increase. The PRM produces reluctance torque and torque by permanent magnet (PM) flux. The reluctance torque is 1 to 2 times larger than the PM torque. When the PRM operates over a constant-power speed range, the field component of the current will be regulated to maintain a constant voltage. The output power of the developed PRM is 8 to 250kW. It is clarified that the PRM operates at a wide variable-speed range (1:5) with high efficiency (92-97%). <BR>It is concluded that the PRM has high performance over a wide constant-power speed range. In addition, the PRM is constructed using a small PM, so that we can solve the problem of cost. Thus, the PRM is a superior machine that is suited for variable-speed drive applications.

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