Hitachi Automotive Systems, Ltd.

Koichi Kashiwa

Masahiro Hosoya

Hiroshi Kanazawa

Yasunaga Hamada

Hidefumi Iwaki

Kenji Nakayama

Tsukasa Taniguchi

Shozo Kawasaki

The purpose of the present invention is to provide a direct current motor wherein the number of coil-connecting wires that cross the outer surface of a coil end part is reduced. In a direct current motor that is provided with an armature that has a plurality of armature slots and has an armature coil that is wound so as to span two armature slots that are separated by a fixed number of armature slots, a lowermost layer of a coil end part is provided with at least four armature coils that are wound through other armature slots so as not to coincide with the wound armature coil, and a layer above the four armature coils that are wound on the bottommost layer is provided with at least four armature coils that are wound in the same manner as the four armature coils.

Direct current motor

In a rotating electrical machine, in the case where a cylindrical component is fixed by press fitting or the like, the opening edge of the cylindrical component is widened toward the end to provide peeps for facilitating the insertion of the cylindrical component. However, the outer shape of a rotor expands due to the peeps, and a gap needs to be provided between the rotor and a stator in consideration of the expanded portion of the outer shape, which causes the degradation of the performance of the rotating electrical machine. In addition, in the case where magnets are fixed only by the tightening force of a magnet cover, the greater the centrifugal force becomes, the larger the clamping margin becomes and similarly the larger the peeps become, and thus the expanded portion also becomes larger. However, if the opening edge is not widened to the end, the absence of the peeps makes it difficult to insert the magnet cover. The purpose of the present invention is to solve such a problem and to allow the magnets to be fixed with the magnet cover without degrading the performance of the rotating electrical machine. Cutout portions are provided at the opening edge of the magnet cover, and the cutout portions at the opening edge of the magnet cover are bent toward the internal diameter after being press fitted in order to fix the magnets.

Structure for preventing scattering of magnet and retaining magnet for rotating electrical machine

Growing community of inventors

Hitachinaka, Japan

Koichi Kashiwa