Mitsubishi Electric Corporation

Hirose Electric Company, Ltd.

Canon Kabushiki Kaisha

Akihiro Maruyama

Masato Ito

Satoshi Nishida

Kunihiko Sekido

Michiyo Sekiya

Shinji Takagi

Kaname Watariguchi

Kenichi Kaku

Takanori Mitani

Hideaki Nagasaka

Hideharu Shimozawa

Kohei Makisumi

Tatsuya Yamaai

Takashi Sawai

Shuhei Iwasaki

Yosuke Hachiya

Kunihiro Kawahara

In sensorless control for a rotary machine, when variations in inductances for U, V, W phases due to manufacturing error are great, imbalance occurs among detected currents for the respective phases. Thus, estimation error of a magnetic pole position of a rotor increases, so that positioning accuracy is reduced. Correction filters for imparting gains in accordance with rotary machine constants for the respective phases are provided to control means or magnetic pole position calculation means, thereby correcting the imbalance occurring among the detected currents for the respective phases.

Control device for AC rotary machine and control method for AC rotary machine

A coaxial connector mounted to a board, wherein a center conductor is provided with a contact portion in contact with the terminal of a counterpart connector. A first coupling portion couples to the contact portion and extends in the axial direction of an outer conductor. A bend portion couples to the first coupling portion and is bent in the radial direction of the outer conductor. A second coupling portion couples to the bend portion and extends in the radial direction of the outer conductor. A connecting portion couples to the second coupling portion and connects said center conductor to on-board circuitry. A first and second expanded portion produced by an expansion of a portion of the outer peripheral surface of said first and second coupling portions, is formed in the first and second coupling portions.

Coaxial connector

Growing community of inventors

Tokyo, Japan

Akihiro Maruyama