INDUCTION HEATING METHOD OF ROTOR OF IPM MOTOR AND INDUCTION HEATING DEVICE

• Main Authors: FUJIKURA MASAHIRO, ARAI SATOSHI, OSUGI YASUO, WAKIZAKA TAKEAKI
• Format: Patent
• Language: English; Japanese
• Published: 17.11.2016
• Subjects: ALLOYS; CHEMISTRY; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GENERATION; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To provide an induction heating method for locally heating only necessary portions in a short period of time for local material improvement in a rotor of an IPM motor and obtaining the rotor of the IPM motor provided with excellent magnetic characteristics and high strength, and further to provide an induction heating device.SOLUTION: Coils 32 are provided closer to a rotor 11 of an IPM motor 1 in a shape surrounding local portions (bridge portions 21) required for heat treatment, a single-phase AC power source 31 is connected to the coils 32, an AC magnetic field is generated, an eddy current is generated in the rotor 11 by the AC magnetic field, and the local portions are imparted with heat treatment effect.SELECTED DRAWING: Figure 4 【課題】ＩＰＭモータのロータにおいて、局所的な材質改善のために必要箇所のみを短時間で局部加熱し、優れた磁気特性および高強度を備えたＩＰＭモータのロータを得るための誘導加熱方法および誘導加熱装置を提供する。【解決手段】ＩＰＭモータ１のロータ１１に近接して、熱処理を要する局部（ブリッジ部２１）を囲む形状にコイル３２を設け、コイル３２に単相交流電源３１を接続して交流磁場を発生させ、交流磁場によりロータ１１内に渦電流を発生させて、局部に熱処理効果を与える。【選択図】図４