Mitsubishi Electric Corporation

Jfe Steel Corporation

Masayuki Sakaguchi

Toshiaki Kashihara

Toshiyuki Yoshizawa

Kei Sakata

Yoshikazu Kawabata

Yasuhide Ishiguro

Daisuke Sasaki

Motoaki Itadani

Mitsuyasu Okamoto

Shintaro Shimizu

Kenji Maekawa

Shinya Nose

Tatsuki Kawashima

Yasue Koyama

Satoshi Mitsunaga

Masayoshi Ishida

Provided is a rotating electric machine, including: a rotary shaft rotatably supported by a front bearing and a rear bearing; a field core firmly fixed to the rotary shaft; and a pulley fitted over the rotary shaft on one end side so as to be rotatable integrally with the rotary shaft. In the rotating electric machine, the pulley, the front bearing, and the field core are arranged in a stated order from the one end side of the rotary shaft toward another end side of the rotary shaft. The pulley is fastened to the rotary shaft with use of a male thread formed on the one end side of the rotary shaft and a nut to be mounted to the male thread. The rotary shaft has a flange portion, which projects radially outward, and is arranged to a position between the front bearing and the field core in an axial direction of the rotary shaft.

Rotary electric machine

This rotating electric machine rotor has a rotor coil composed of; a lower coil field wound around the outer circumference of a winding drum portion of a bobbin; and a mountain-wound coil field wound around the outer circumference of the lower coil field. A cross point in the mountain-wound coil field and a cross point in the lower coil field are shifted from each other in the circumferential direction. Thus, it becomes possible to shift the cross point positions without changing the thickness of the winding drum portion of the bobbin and without using a tape or the like.

Rotating electric machine rotor

A method for manufacturing an electric resistance welded steel tube including: forming a steel tube material into an almost cylindrical open pipe, the steel tube material being a steel sheet wherein Ti and N satisfy (N/14)&#x3c;(Ti/47.9); forming an electric resistance welded steel tube by bonding ends of the open pipe to each other by induction resistance welding with heat input controlled so that the bond width is 30 to 65 &#x3bc;m; heating the electric resistance welded steel tube to a temperature equal to or higher than the Actransformation temperature; and diameter-reducing rolling the heated electric resistance welded steel tube with rolling reduction expressed by an outer diameter ratio greater than (1&#x2212;25/the bond width before diameter-reducing rolling (&#x3bc;m))&#xd7;100% such that the bond width is 25 &#x3bc;m or less.

Method for electric resistance welded steel tube

A restricting member is provided that is in contact with respective bent lead portions of a long-sized lead and a short-sized lead and imparts a tension to linear lead portions thereof in a mold for insert molding. The restricting member reliably prevents the leads from displacement and deformation resulting from the pressure of the resin at the time of insert molding, and allows the long-sized lead and the short-sized lead to be disposed at proper positions in a molded body.

Slip ring apparatus for electric rotating machine

A steel pipe blank having a composition containing 0.5% or less C and 85% or more Fe in terms of mass percent is heated, and stretch-reducing is then performed so that the diameter decrease ratio is 15% or more and the rolling finishing temperature is (the Artransformation point&#x2212;10)&#xb0; C. or lower. Consequently, a structure in which the ratio of X-ray diffraction intensity obtained from the plane in which the &#x3c;100&#x3e; direction of crystal grains is preferentially oriented parallel to the circumference direction and the &#x3c;011&#x3e; direction of crystal grains is preferentially oriented parallel to the rolling direction of the steel pipe to that obtained for a three-dimensionally randomly oriented sample is 3.0 or more is formed, and the r-value is increased, thereby improving the magnetic properties of the steel pipe.

Steel pipe with good magnetic properties and method of producing the same

Growing community of inventors

Tokyo, Japan

Masayuki Sakaguchi