Nidec Corporation

Takahiro Uetani

Shuji Iwasaki

Takao Atarashi

Kenichiro Hamagishi

Takuya Kaneko

Masaaki Ogawa

Noriyuki Iio

Ho Quang Danh

A motor housing includes a bearing holder that holds a first bearing and accommodates a rotor and a stator. A second bearing is disposed inside a motor shaft at one axial end portion of the motor shaft and has lower electric resistance than the first bearing. The conductive member electrically connects the second bearing to a motor housing. The radially outer end portion of the second bearing is in contact with the inner peripheral surface of the motor shaft. The contact portion of the conductive member is in contact with the radially inner end portion of the second bearing. The fixed portion is fixed to the motor housing radially outward of the motor shaft. A bridge portion connects the contact portion and the fixed portion.

Motor and drive apparatus having a conductive bearing

A rotor includes a shaft, a rotor core, at least one magnet, and at least one fixing portion. The shaft extends in an axial direction. The rotor core includes laminations, and at least one caulking portion. The laminations are stacked in the axial direction. The at least one caulking portion is located at a radial-directional inner side of the at least one magnet to caulk the laminations to each other. The at least one magnet is embedded in the rotor core. The at least one fixing portion fixes at least portions of outer peripheral edges of the laminations to each other.

Rotor, motor, and electric power steering device

A rotor includes a shaft extending along a central axis, a sensor magnet positioned on one axial side of the shaft, a magnet holder that includes a circumferential wall which is open on another axial side and accommodates an end portion on the one axial side of the shaft and the sensor magnet therein, and a support wall positioned on the one axial side of the sensor magnet, the magnet holder being fixed to the shaft, and a filling that fills an inside of the circumferential wall. The sensor magnet is sandwiched between the support wall and the filling in an axial direction.

Rotor and motor

A motor includes a shaft that extends in an axial direction, a rotor including a field magnet, a stator, a resolver positioned farther toward one side of the motor in the axial direction than the rotor and the stator, and a shield including at least a portion is between the rotor and the resolver in the axial direction. The shield includes a bottom portion of which at least a portion is between the rotor and the resolver in the axial direction and which includes a through-hole through which the shaft passes, and a convex portion that extends from the bottom portion toward the other side in the axial direction. A front end portion of the convex portion is positioned farther toward an inner side of the motor in a radial direction than an outer circumferential portion of the field magnet when viewed in the axial direction.

Growing community of inventors

Kyoto, Japan

Takahiro Uetani