Electromagnetic contactor

Patent metadata

Field	Value
Publication number	US-10056200-B2
Application number	US-201214344789-A
Country	US
Kind code	B2
Filing date	Oct 3, 2012
Priority date	Oct 7, 2011
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

An electromagnetic contactor includes a contact mechanism including a pair of fixed contacts having fixed contact portions and interposed in a current conduction path, and a movable contact having a pair of movable contact portions capable of contacting to and separating from the pair of fixed contact portions. At least one of the pair of fixed contacts or the movable contact is formed in a shape to form magnetic fields generating Lorentz forces opposing electromagnetic repulsion forces generated in an opening direction between the fixed contact portions and the movable contact portions when current is conducted. External connection conductors are connected to external connection terminals of the fixed contacts, an attachment direction of fixed portions fixed to the external connection terminal of the fixed contacts is set to cross a current flow direction flowing through the movable contact.

First claim

What is claimed is:

1. An electromagnetic contactor comprising:
a contact mechanism including a pair of fixed contacts having fixed contact portions interposed in a current conduction path, and a movable contact having a pair of movable contact portions contacting to and separating from the pair of fixed contact portions, wherein at least one of the pair of fixed contacts or the movable contact is formed in a shape to form magnetic fields generating Lorentz forces opposing electromagnetic repulsion forces generated in an opening direction between the fixed contact portions and the movable contact portions when current is conducted, and
external connection conductors, each having a fixed portion connected to external connection terminals of the fixed contacts and extending laterally outwardly from a case, an attachment direction of each of the fixed portions fixed to the external connection terminal of the fixed contacts being set to cross a current flow direction flowing through the movable contact,
wherein the attachment direction of one of the fixed portions is opposite to the attachment direction of another of the fixed portions to cross the current flow direction flowing through the movable contact,
each of the external connection conductors further includes a first conductor portion connected to an end of the fixed portion at aside opposite to the external connection terminal and extending parallel to the movable contact along a front surface of the case, and
each of the external connection conductors further includes a second conductor portion connected to an end of the first conductor portion at a side opposite to the fixed portion and extends to a side opposite to the external connection terminal along the front surface of the case and parallel to the fixed portion, and a third conductor portion connected to the second conductor portion connected to an end of the second conductor portion at a side opposite to the first conductor portion and extends parallel to the movable contact.

Assignees

• Fuji Electric Co Ltd
• Fuji Electric Fa Components & Systems Co Ltd

Inventors

• Kashimura Osamu
• Isozaki Masaru
• Tachikawa Hiroyuki
• Takaya Kouetsu
• Naka Yasuhiro
• Shiba Yuji

Classifications

• H01H1/54

  by magnetic force {(combined with electrodynamic opening H01H77/101)} · CPC title

• H01H1/58 Primary

  Electric connections to or between contacts; Terminals {(for high tension switches H01H33/025; for electromagnetic relays H01H50/14; for circuit breakers H01H71/08)} · CPC title

• H01H50/546

  for contactors having bridging contacts · CPC title

• H01H50/14 Primary

  Terminal arrangements {(for coils H01H50/443)} · CPC title

• H01H50/10

  Electromagnetic or electrostatic shielding (casings H01H50/02) · CPC title