Nidec Sankyo Corporation

Kabushiki Kaisha Sankyo Seiki Seisakusho

Nobuki Kokubo

Hiroki Kuratani

Takashi Yamamoto

Masaki Harada

Hayato Naito

Satoshi Tanimura

Izumi Komatsu

A motor may include a rotor provided with a rotating shaft that protrudes to a first side in an axial direction; a stator disposed on an outer peripheral side of the rotor; a resin sealing member that covers the stator; and a cover member that is disposed on the first side of the resin sealing member and supports the rotating shaft. The cover member may include a plurality of gate marks disposed at different angular positions and a plurality of ribs that protrude to a second side in the axial direction. The ribs may be disposed at positions where each midpoint between the gate marks adjacent to each other in the circumferential direction overlap with an axis of the rotor.

Motor and pump device

A motor may include a rotor including a rotating shaft that protrudes to a first side in an axial direction; a stator disposed on an outer peripheral side of the rotor; a resin sealing member that covers the stator; and a cover member that is disposed on the first side of the resin sealing member and supports the rotating shaft. The resin sealing member may include a resin sealing member side position regulating surface that makes contact in the axial direction with a cover member side position regulating surface provided on the cover member, and a resin sealing member side securing surface that faces, in the axial direction and with a gap, a cover member side securing surface provided on the cover member. At least a portion of the resin sealing member side securing surface is secured to the cover member side securing surface via an adhesive agent layer.

To provide a pump device configured such that the impeller can be prevented from being moved toward a case body by which a pump chamber is defined. An impeller is arranged in a pump chamber defined by a case body and an end wall portion of a motor. The impeller includes back blades protruding from a shroud toward the end wall portion of the motor. When the impeller is driven to circulate fluid through the pump chamber, a fluid is drawn out by the back blades from a clearance between the impeller and the end wall portion of the motor. Therefore, the impeller is moved by the negative pressure toward the end wall portion of the motor. The back blades function as a suction power generation mechanism configured to generate suction power sucking the impeller toward the end wall portion.

Pump and impeller with auxiliary blades on the underside of the impeller and a permanent magnet rotor

A rotor may include a rotation shaft, a magnet on an outer peripheral side, a holding member holding the rotation shaft and the magnet, and a plurality of recessed parts provided in an end face of the magnet in an axial line direction of the rotation shaft so as to be separated from each other in a circumferential direction. A surface of each of the recessed parts is formed in a spherical shape, the holding member has a flange portion which covers the end face of the magnet from an end on an inner peripheral side of the end face of the magnet to an outer peripheral side with respect to the plurality of the recessed parts, and the flange portion is adhered to the surfaces of the recessed parts.

Rotor of motor, motor and pump device

Motor

A motor board of a capstan motor, which is made of a metallic material offering good heat dissipation is provided in a tape running apparatus in such a way as to face a circuit board thereof. A motor drive IC , into which drive circuits for driving and controlling a capstan motor , a drum motor and a loading motor is incorporated, are mounted on this motor board . The circuit board and the motor board are connected to each other by an inter-board connector . Further, electrical connection between the circuit board and each of the motors , and is established through the motor board

Tape running apparatus, motor board, and capstan motor

A brushless motor speed detecting apparatus includes a stator having three-phase driving coils which are energized reciprocally in the positive and negative directions, a rotor having magnetic poles, three position detectors for obtaining three-phase output signals corresponding to the rotation of the rotor, a first synthesizing circuit for synthesizing the output signals of the three position detectors, mode switching circuit for forming an energizing mode switching signal according to the output signal of the first synthesizing circuit, a driving circuit for supplying currents to the driving coils by switching an energizing mode from a first energizing mode to a second energizing and vice versa according to the output signal of the mode switching circuit, and a second synthesizing circuit for synthesizing a speed signal by detecting in the non-energizing section of the first energizing mode the induced electromotive voltages generated in the driving coils as the rotor rotates to base the synthesis of the speed signal on the induced electromotive voltages.

Growing community of inventors

Nagano, Japan

Nobuki Kokubo