Hitachi, Ltd.

Hitachi Industrial Equipment Systems Co., Ltd.

Kenta Deguchi

Satoru Kaneko

Yoshitaka Iwaji

Yuji Enomoto

Akihiro Nakamura

Yutaka Matsumoto

Koichi Watanabe

Satoshi Kikuchi

Masahiro Hori

Naoki Sakurai

Hisashi Tanie

Yasuaki Aoyama

Hirooki Tokoi

Yuichiro Tanaka

Norihisa Iwasaki

Akihito Nakahara

Hironori Ohashi

Zhuonan Wang

Yuuri Takano

Hideto Takada

Nobuyuki Narisawa

Yuki Makaino

Tetsuji Kato

Tomoaki Yamashita

Takuya Uemura

Kouichi Enokida

A rotating machine drive system includes a power supply, an electric motor, a rotating machine, a belt drive transmission unit, an electrical information detection sensor, and a diagnostic unit. The electrical information detection sensor detects a current or a voltage. The diagnostic unit calculates estimated rotational speed information of the rotating machine based on the current or the voltage, calculates a reference rotational frequency from a rotational speed of the electric motor and a ratio between a diameter of the electric motor side pulley and a diameter of the rotating machine side pulley. The diagnostic unit uses a difference or a ratio between the estimated rotational speed information and the reference rotational frequency to determine whether or not there is the transmission abnormality.

Rotating machine drive system and control method for rotating machine drive system

The purpose of the present invention is to obtain a structure with which it is possible to improve the heat dissipation performance and efficiency of an axial gap dynamo-electric machine. Accordingly, the present invention is an axial gap dynamo-electric machine of such construction that a disc-shaped rotor in which permanent magnets are disposed is provided in the axial direction and a stator is disposed in the axial-direction center portion, wherein the outer circumferential side of a stator winding is in intimate contact with the inside diameter of a housing, embedding with a mold resin is used for the housing and a stator core and for a stator coil and the housing so that a connection is established with the housing, and the housing comprises a nonmagnetic, electrically nonconductive material.

Axial gap dynamo-electric machine

To significantly improve a heat dissipation property of an axial gap rotary electric machine within a size necessary for configuring a motor. In an axial gap rotary electric machine comprising a stator and a rotor in an axial direction, the stator has a plurality of stator cores arranged in a circumferential direction and coils wound around the stator cores, and a heat pipe obtained by filling an inside of a metal hollow pipe with a refrigerant is arranged in a gap between adjacent coils formed in an outer diameter portion of the stator in a radial direction and a housing with a necessary insulation distance between the coils and the heat pipe. The heat pipe extends in a direction of a rotation axis and an opposite output side, and is in contact with a heat dissipating fin outside an end bracket on the opposite output side.

Axial gap rotary electric machine

Stator coils each consist of a plurality of rectangular conductor coil pieces, the adjacent connection ends of which are connected to each other on the outer diameter side of a stator. The coil pieces each have: a folded portion folded in a rotation axis direction on the inner diameter side of the stator; inner diameter-side open leg portions opened from both sides of the folded portion toward the circumferential directions of the rotation axis; linear portions each bent from each of the inner diameter-side open leg portions and disposed so as to pass through the stator from the inner diameter side to the outer diameter side; and an outer diameter-side open leg portions opened from the linear portions toward the circumferential directions of the rotation axis and extending to the connection ends. The inner diameter-side open leg portions extending to the folded portion have a correction portion for correcting the position of the rectangular conductor and are formed so as to align the connection end extending to the correction portion with the connection end of the adjacent coil piece.

Stator coil, axial gap-type rotating electric machine, and method for manufacturing same

An axial gap rotating-electric machine includes a stator, a rotor arranged via an air gap in the direction of an axis of rotation of a rotating-electric machine with respect to the stator, and a housing configured to accommodate the stator and the rotor, and the stator includes a plurality of stator cores arranged in the circumferential direction, coils configured to wind the peripheries of the respective stator cores, and a resin for molding the plurality of stator cores wound with the coils, and the stator cores each include a protruding portion protruding partly from the coil in the direction of axis of rotation, and a conductive member is provided so as to come into contact with peripheral surfaces of the protruding portions of the stator cores, and grounding is achieved by the conductive member.

Axial gap rotating-electric machine

Growing community of inventors

Tokyo, Japan

Kenta Deguchi