BRUSHLESS MOTORS AND ELECTRIC DEVICE

To provide a brushless motor capable of adjusting the rotational balance of a rotor without using a balance weight, and an electric device including the same.SOLUTION: A rotor core 6b is fixed around a rotating shaft 6a. Four magnets 6c are inserted and held in the rotor core 6b. A wall thinning por...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUMOTO KENICHIRO, ICHIZUKA SHINNOSUKE, YAMAGUCHI YUTO, SUKEGAWA KATSUAKI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR DYNAMO-ELECTRIC MACHINES ELECTRICITY GENERATION HAND TOOLS MANIPULATORS PERFORMING OPERATIONS PORTABLE POWER-DRIVEN TOOLS TRANSPORTING
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Beschreibung
Zusammenfassung:	To provide a brushless motor capable of adjusting the rotational balance of a rotor without using a balance weight, and an electric device including the same.SOLUTION: A rotor core 6b is fixed around a rotating shaft 6a. Four magnets 6c are inserted and held in the rotor core 6b. A wall thinning portion 6i is provided on the outer peripheral surface of the rotor core 6b. The position of the center of the wall thinning portion 6i in the direction around the rotation axis 6a in the same direction substantially coincides with the center position of a magnet 6c in the same direction (the center position of the pole of a rotor). The magnet 6c is magnetized after forming the wall thinning portion 6i.SELECTED DRAWING: Figure 4 【課題】バランスウエイトを用いることなくロータの回転バランスを調整することの可能なブラシレスモータ及びそれを有する電気機器を提供する。【解決手段】回転軸６ａの周囲にロータコア６ｂが固定される。ロータコア６ｂに４つの磁石６ｃが挿入保持される。ロータコア６ｂの外周面に減肉部６ｉが設けられる。減肉部６ｉの回転軸６ａ周り方向における中心の同方向における位置は、同方向における磁石６ｃの中心位置（ロータの極の中心位置）と略一致する。磁石６ｃは、減肉部６ｉを形成した後に着磁されたものである。【選択図】図４