ROTARY MACHINE ROTOR

• Main Authors: TAKAHASHI DAICHI, SUGASAWA MASAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 21.05.2020
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

To provide a rotary machine rotor that suppresses thermal demagnetization of a permanent magnet.SOLUTION: In a rotor 10 of an IPM motor 1, since a second heat conduction layer 42 having a low heat conductivity is located on the stator 20 side (that is, the second surface 30b side) of the permanent magnet 30, the second heat conduction layer 42 prevents heat from transferring from the rotor core 14 to the permanent magnet 30. Further, since a first heat conductive layer 41 having high thermal conductivity is located on the shaft 12 side (that is, the first surface 30a side) of the permanent magnet 30, the heat transferred from the rotor core 14 to the permanent magnet 30 is radiated from the shaft 12 side of the permanent magnet 30. That is, the heat from the stator 20 is hard to be transmitted to the permanent magnet 30, and the heat of the permanent magnet 30 is easily released, such that the temperature rise of the permanent magnet 30 is easily suppressed.SELECTED DRAWING: Figure 2 【課題】永久磁石の熱減磁の抑制が図られた回転機のロータを提供する。【解決手段】 ＩＰＭモータ１のロータ１０においては、永久磁石３０のステータ２０側（すなわち第２面３０ｂ側）には、熱伝導率が低い第２の熱伝導層４２が位置しているため、第２の熱伝導層４２によりロータコア１４から永久磁石３０への伝熱が抑制される。また、永久磁石３０のシャフト１２側（すなわち第１面３０ａ側）には、熱伝導率が高い第１の熱伝導層４１が位置しているため、ロータコア１４から永久磁石３０に伝わった熱は、永久磁石３０のシャフト１２側から放熱される。すなわち、ステータ２０からの熱が永久磁石３０に伝わりづらく、かつ、永久磁石３０の熱が放出されやすい構成となっており、永久磁石３０の温度上昇が抑制されやすくなっている。【選択図】図２