ROTARY ELECTRIC MACHINE

• Main Authors: MIYOSHI TSUTOMU, ZEISHO RYOHEI, YAJIMA KENJI
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a concentratedly wound permanent magnet motor which can stably fix a bobbin against a temperature change and an electromagnetic vibration during operation, not like a conventional counterpart in which when current flows through coil wound around the bobbin, a gap occurs, due to a temperature rise, between the coil and the bobbin whose thermal expansion coefficients are different from each other, and at this time, when the bobbin vibrates due to electromagnetic vibration, friction and noise occur between itself and a stator core, resulting wear and breakage of the bobbin occurs, which is not desirable from a view point of a long-term reliability.SOLUTION: In order to solve the above-mentioned problem, a rotary electric machine of the present invention has: a stator having teeth formed by laminating steel plates; a rotor having a rotor core laminating the steel plates and provided with permanent magnets aligned on a surface opposed to the teeth, and bearings disposed between the stator and the rotor. A nearly square cylindrical bobbin wound with a coil is mounted to the tooth, and a flat spring contacting with the bobbin is provided to an end plate of the steel plates composing the tooth.SELECTED DRAWING: Figure 3 【課題】 ボビンに巻き回されたコイルに電流が流れると、温度上昇によって熱膨張係数が異なる両者間に隙間が生じる。このとき、電磁振動によってボビンが振動すると、ステータコアとの間で摩擦や騒音が生じ、ボビンの磨耗や破壊に至り、長期信頼性の観点からも好ましくない。そこで、本発明は、運転中の温度変化や電磁振動に対しても、ボビンを安定して固定できる集中巻永久磁石モータを提供することを目的とする。【解決手段】 上記課題を解決するため、本発明の回転電機は、鋼板を積層して形成したティースを有するステータと、鋼板を積層し、前記ティースの対面に永久磁石を配列したロータコアを有するロータと、前記ステータと前記ロータの間に配置された軸受と、を備え、前記ティースには、コイルを巻き回した概略四角筒状のボビンが装着されており、前記ティースを構成する鋼板の端板には、前記ボビンと接触する板ばねが設けるものとした。【選択図】 図３