Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Kouki Naka

Masaya Inoue

Akira Hashimoto

Masao Morita

Manabu Kobayashi

Hiroyuki Akita

Kazumasa Ito

Masatsugu Nakano

Haruyuki Kometani

Yuji Nakahara

Toshiyuki Yoshizawa

Yoshinori Miyamoto

Yoshihiko Kinpara

Kanji Shinkawa

Akihiro Shimada

Yasuki Kimura

Akira Watarai

Misa Nakayama

Shinichirou Yoshida

Satoshi Yamashiro

Michio Nakamoto

Hidetoshi Teruyama

Kazumasa Itou

An automotive generator that includes a Lundell rotor. First and second protruding portions are disposed so as to project from inner wall surfaces of portions of first and second yoke portions at root portions of first and second claw-shaped magnetic pole portions, and first and second recess portions are recessed into inner wall surfaces of portions of the first and second yoke portions that face the second and first protruding portions. In addition, a shape of a region in which the field coil is disposed is configured into a wave shape that has a cross-sectional shape in a plane that includes a central axis of the pole core that is approximately constant in a circumferential direction and that zigzags alternately in an axial direction at positions of each of the first and second claw-shaped magnetic pole portions.

Automotive alternating-current generator

The electric rotating machine includes a fixed stator fixed to the inner circumferential side of a housing, a moving stator rotatably supported on the inner circumferential side of the housing, a rotor disposed concentrically on the inner circumferential side of the fixed stator and the moving stator, and a moving stator drive formed of a gear and a motor for rotating the moving stator by a predetermined angle. The moving stator drive is detachable with respect to the housing. Coil leader lines are stored in an internal part of the housing so that the moving stator is capable of rotating by a predetermined angle.

Electric rotating machine having detachable moving stator drive unit

A control apparatus is for controlling an AC rotary machine which includes a first and second stator elements and a rotor, in which the first stator element can be turned, or offset, in a circumferential direction relative to the second stator element. The control apparatus includes an actuator for adjusting a voltage induced in a stator coil due to rotation of the rotor by driving the first stator element, a magnetic flux command calculator for calculating a desired magnetic flux amplitude command based on rotating speed of the AC rotary machine, a magnetic flux estimator for estimating magnetic flux amplitude of the AC rotary machine, a speed command calculator for calculating an actuator speed command to be given to the actuator so that the estimated magnetic flux amplitude follows the magnetic flux amplitude command, and an actuator controller for controlling the actuator according to the actuator speed command.

Control apparatus for AC rotary machine

An electric rotating machine comprises: a stator in which a coil is wound on a plurality of teeth in concentrated winding, and the coil is connected to a three-phase power supply; and a rotor disposed in opposition to the teeth of the stator; wherein a ratio between the number of poles and the number of slots of the stator is 1:3. There is no higher harmonics of magnetomotive force in low order close to fundamental wave, thus enabling efficient operation of the electric rotating machine. Furthermore, owing to the stator of concentrated winding, it is possible to provide an electric rotating machine of high productivity with small coil end, high mass production, and high space factor.

Induction machine

In a rotating electric machine including a field pole unit having ten magnetic poles (P=10) and an armature having twelve teeth (Q=12), armature coils are wound around the successive teeth with phase relationships and winding polarities arranged in the order of U+/U+, U&#x2212;/V+, V&#x2212;/V&#x2212;, W&#x2212;/V+, W+/W+, W&#x2212;/U+, U&#x2212;/U&#x2212;, U+/V&#x2212;, V+/V+, W+/V&#x2212;, W&#x2212;/W&#x2212; and W+/U&#x2212;, where 'U,' 'V' and &#x201c;W&#x201d; represent three phases of the individual armature coils while &#x201c;+&#x201d; and &#x201c;&#x2212;&#x201d; denote winding polarities. Among all harmonic components of magnetomotive forces produced by the armature coils, harmonic components of orders lower than a synchronized component can be reduced in this rotating electric machine. This structure decreases eddy currents flowing in the field pole unit, resulting lower eddy current loss in the field pole unit of the rotating electric machine.

Electric machine

A variable-speed rotating electric machine includes at least two armatures having respective armature coils for multiple phases, and a rotor having permanent magnets. The armatures are arranged concentrically with each other in such a manner that electrical angular positions of the individual armatures can be relatively varied in a circumferential direction. The armature coils of each phase are series-connected and the rotor is arranged concentrically with the armatures on the inside thereof.

Rotating electric machine

In a linear motor according to this invention, the field permanent magnetsare arranged at an equal pitch around a field iron coreso that the poles are alternately changed. Also, an armatureon the needle side is arranged oppositely via a magnetic gap on a magnetic pole face of the field permanent magnets. The armatureconsists of an armature core forming the teeth and a yoke portion by punching an electromagnetic steel plate like the comb teeth, coil being wound around a plurality of teethandfor this armature core to form the armature windingsand. The teethwithout coil winding is disposed between teeth with coil windingandand between teeth with coil windingand. The teethandwith coil winding and the teethwithout coil winding are alternately arranged.

Linear motor

An armature of a rotating electric machine has a plurality of first magnetic teeth arranged side by side along a circumferential direction of the rotating electric machine and a plurality of second magnetic teeth joined to the first magnetic teeth. A pair of joint portions is formed at both end surfaces of a yoke portion of each first magnetic tooth, the joint portions formed at the facing end surfaces of the yoke portions of each successive pair of adjacent first magnetic teeth together forming a connecting part, whereas a mating part is formed at an outer end surface of each second magnetic tooth. Each second magnetic tooth is inserted between the adjacent first magnetic teeth along an axial direction of the rotating electric machine with the mating part fitted on the connecting part to interconnect the adjacent first magnetic teeth.

Armature of rotating electric machine

Growing community of inventors

Tokyo, Japan

Kouki Naka