PERMANENT MAGNET

• Main Authors: TSUDA TEPPEI, MIYAJI TSUYOSHI, IKEMOTO MASAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 25.04.2019
• Subjects: BASIC ELECTRIC ELEMENTS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

To realize a technique capable of improving demagnetization proof strength at a corner of a permanent magnet.SOLUTION: A permanent magnet 1 is used for a rotary electric machine having a rotor 3 and a stator 2, and comprises: a pair of magnetic pole face sections MF formed so as to face an opposite side to each other; a non-magnetic pole face section F that is a face other than the pair of magnetic pole face sections MF; and a plurality of corner sections C formed at a boundary section of the magnetic pole face section MF and the non-magnetic pole face section F. From among the plurality of corner sections C, the corner section C arranged nearest to a gap G between the rotor 3 and the stator 2 is an object corner section C1. A magnetization direction at the object corner section C1 is tilted to outside of a magnet width direction W compared with that at a central section 15 of the magnet width direction of the magnetic pole face sections MF.SELECTED DRAWING: Figure 4 【課題】永久磁石の角部における減磁耐力を向上させることが可能な技術の実現。【解決手段】永久磁石１は、ロータ３とステータ２とを備える回転電機に用いられ、互いに反対側を向くように形成された一対の磁極面部ＭＦと、一対の磁極面部ＭＦ以外の面である非磁極面部Ｆと、磁極面部ＭＦと非磁極面部Ｆとの境界部分に形成された複数の角部Ｃと、を有している。複数の角部Ｃのうち、ロータ３とステータ２との間のギャップＧの最も近くに配置される角部Ｃを対象角部Ｃ１として、対象角部Ｃ１における磁化方向が、磁極面部ＭＦの磁石幅方向の中央部１５における磁化方向に比べて、磁石幅方向Ｗの外側に傾いている。【選択図】図４