Kabushiki Kaisha Meidensha

Japan Ae Power Systems Corporation

Technical Consulting Tanimizu Ltd.

Akira Nishijima

Yoshihiko Matsui

Hidemitsu Takebuchi

Takaaki Furuhata

Toshimasa Fukai

Toru Tanimizu

Yoshiyuki Tanimizu

Yoshihiro Fukatsu

Toyohisa Tsuruta

Hiroshi Fujimaki

An attraction coil, a repulsion coil and a plunger are disposed in a magnetic path of an electromagnetic device. An starting flux generating section is disposed between the attraction coil and the repulsion coil in the magnetic path. A magnetic flux of the starting flux generating section is repulsed magnetically by a magnetic flux of the repulsion coil at a part of the magnetic path to start the plunger. The plunger is attracted to one of first and second magnetic path parts by electromagnetic forces generated from magnetic fluxes of the attraction coil and the repulsion coil.

Electromagnetic device

A contact for a vacuum interrupter, includes: 1) a contact plate; and 2) a contact carrier. The contact carrier includes: a first end face which is fitted with the contact plate, and a peripheral face which is formed with a slit portion in such a manner as to form a coil part. The coil part flows a current such that a longitudinal magnetic field is formed in an axial direction of the contact carrier. The first end face fitted with the contact plate is formed with a circumferential slit portion which connects to the slit portion.

Contact for vacuum interrupter, and vacuum interrupter using same

An electrode of a vacuum circuit breaker has a cup member and a contact. The cup member has an opening and a periphery which is formed with a slit so as to form a coil section. An electric current flows in the coil section so as to generate a longitudinal magnetic field in a direction along an axis of the cup member. The slit is bent and continuously extends on the periphery from a first end of the cup member to a second end of the cup member opposite to the first end of the cup member. The contact is shaped into a plate, and seals the opening of the cup member.

Electrode of vacuum circuit breaker, and method of producing electrode of vacuum circuit breaker

A contact and a vacuum interrupter using the contact. The contact includes a hollow cylindrical contact carrier and a contact plate disposed on one of the axial end faces of the contact carrier. First slits and second slits extend from the one of the axial end faces of the contact carrier and the other thereof, respectively. The first slits and the second slits are inclined with respect to the center axis of the contact carrier and have a first height x and a second height y extending in the axial direction of the contact carrier, respectively. Assuming that the axial length of the contact carrier is 1, the first height x and the second height y satisfies a relationship given by the following expressions (1)-(3): (1) 0.9&gE;x, (2) x&gE;y&gE;0.2x, (3) 1.4&gE;x&plus;y&gE;0.8.

Contact for vacuum interrupter and vacuum interrupter using the contact

In a contact arrangement and a vacuum interrupter using the contact arrangement, the contact arrangement includes: a hollow cylindrical contact carrier on one end surface of which a contact plate is attached; a plurality of first slits formed on the contact carrier from the one end surface of the contact carrier; and a plurality of second slits formed on the contact carrier from each predetermined point of midway through an axial direction of the contact carrier, each of the first and second slits being tilted with respect to the axial direction of the contact carrier, a coil portion being formed on a portion of the hollow cylindrical contact carrier between each of the first and second slits and an adjacent one of the first and second slits and a longitudinal magnetic field being formed along the axial direction of the contact carrier by a current flowing on the coil portion.

Contact arrangement for vacuum interrupter and vacuum interrupter using the contact arrangement

A contact and a vacuum interrupter using the contact. The contact includes a hollow cylindrical contact carrier and a contact plate disposed on one of the axial end faces of the contact carrier. First slits and second slits extend from the one of the axial end faces of the contact carrier and the other thereof, respectively. The first slits and the second slits are inclined with respect to the center axis of the contact carrier and have a first height x and a second height y extending in the axial direction of the contact carrier, respectively. Assuming that the axial length of the contact carrier is 1, the first height x and the second height y satisfies a relationship given by the following expressions (1)-(3): (1) 0.9&gE;x, (2) x&gE;y&gE;0.2x, (3) 1.4&gE;x&plus;y&gE;0.8

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Shizuoka, Japan

Akira Nishijima