Nidec Copal Electronics Corporation

Masatoshi Obayashi

Yusuke Saito

Hiroki Matsushita

Takashi Kanai

Toshiya Uchida

Kyosuke Saso

Tadashi Okabe

Kazuhiko Horie

An air blower capable of preventing a deformation of the vane wheel is provided. A cylindrical holder is provided on rotatable shaft. A vane wheel is provided on the outer circumference of the holder. The holder includes a top section including a plurality of first openings at one end thereof in the axial direction, and includes a flange including a plurality of second openings at the other end thereof, and the vane wheel includes first protrusions to be inserted into the first openings of the holder and fixed to the top section by deformed sections protruding from the first openings, and second protrusions to be inserted into the second openings of the holder and fixed to flange by deformed sections protruding from the second openings.

Air blower

The present invention is a coreless coil characterized in that a plurality of &#x3b1;-winding coils are formed by a first coil layer and a second coil layer that has a same shape and a same width as the first coil, each coil layer having a center opening, being laminated together. Each outer peripheral portion in a connection direction of the plurality of &#x3b1;-winding coils has a connection stepped portion that is point-symmetric in relation to a center axis line of a Z-axis (the Z-axis being an axis that, in relation to an X-axis that is a center of both connected end portions of the &#x3b1;-winding coil and passes through a lamination boundary line of the first coil layer and the second coil layer, is a center of both unconnected end portions of the &#x3b1;-winding coil and passes through the lamination boundary surface such as to be orthogonal to the X-axis) of the respective center opening. The plurality of &#x3b1;-winding coils are connected in an annular shape in a state in which the connection stepped portions overlap each other and are attached to each other. An object of the present invention is to improve the bonding force of the plurality of &#x3b1;-winding coils.

Coreless coil and method for manufacturing coreless coil

In a motor, a dynamic pressure gas bearing is prevented from seizing when the motor shaft and a sleeve contact each other. The number of rotations of a rotating body with respect to a case is maintained substantially constant both before and after contact. Auxiliary bearings are arranged in series with the gas bearing. A non-contact detent torque generation mechanism in parallel with the auxiliary bearings suppresses rotation in the auxiliary bearings. The sum of a predetermined detent torque generated by the torque generation mechanism during a rotation suppression time and the friction torque of the auxiliary bearings is smaller than the magnitude of an adhesion-time contact friction torque generated when the motor shaft and sleeve adhere to each other and is greater than the magnitude of a rotation-time viscous friction torque of the dynamic pressure gas bearing while the motor shaft and sleeve are spaced from each other.

Electric motor having seizure-resistant dynamic pressure gas bearing

Growing community of inventors

Sano, Japan

Masatoshi Obayashi