STATOR

• Main Authors: SUZUKI FUMINORI, YAMAGUCHI KOJI, AKAMATSU YOSUKE, JIKUMARU TAKEHIRO
• Format: Patent
• Language: English; Japanese
• Published: 07.02.2023
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

To provide a stator in which eddy-current loss that occurs in a rectangular coil can be reduced.SOLUTION: A stator 1A comprises stator cores 10 having a plurality of slots 12 each open in an inner peripheral surface 11 and a plurality of teeth 13 each formed between the slots 12 adjacent to each other, and rectangular coils 20A wound around the teeth 13 respectively. The rectangular coil 20A has a deformed part 23 including either convex portions 24 or concave portions on or in an inner surface 27 opposing the inner peripheral surface 11. Thereby, a current loop L of eddy currents caused by a leakage magnetic flux at the inner surface 27 is divided by the deformed part 23, in the rectangular coil 20A, and then the current loop L of large eddy currents hardly occurs, so that only the current loop L of small eddy currents divided by the deformed part 23 occurs, which can reduce eddy-current loss that occurs in the rectangular coil 20A.SELECTED DRAWING: Figure 1 【課題】平角コイルで発生する渦電流損を低減することができる固定子を提供する。【解決手段】内周面１１に開口する複数のスロット１２と、互いに隣接するスロット１２の間に形成された複数のティース１３とを有する固定子鉄心１０と、ティース１３のそれぞれに巻回された平角コイル２０Ａとを備えた固定子１Ａにおいて、平角コイル２０Ａは、内周面１１に対向する内側面２７に凸部２４及び凹部のいずれかを含む変形部２３を有する。このため、平角コイル２０Ａは内側面２７において漏れ磁束による渦電流の電流ループＬは変形部２３で分断され、大きな渦電流の電流ループＬが生じ難くなり、変形部２３により分断された小さな渦電流の電流ループＬとなるため、平角コイル２０Ａで発生する渦電流損を低減することができる。【選択図】図１