Electrical contactor with movable arm

Patent metadata

Field	Value
Publication number	US-9583283-B2
Application number	US-201414554352-A
Country	US
Kind code	B2
Filing date	Nov 26, 2014
Priority date	Nov 26, 2013
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

An electrical contactor has a first terminal having a fixed member with at least one fixed electrical contact, a second terminal, and at least one movable electrical contact in electrical communication with the second terminal. A dual-coil actuator is also provided and has a first drive coil drivable to open and close the movable and fixed electrical contacts, and a second non-drive coil feedback connected to induce a reverse flux to temper and stabilize a net flux. Control of a delay time of the opening and closing electrical contacts is thus possible, so as to be at or adjacent to a subsequent or next zero-crossing of an associated AC load current waveform.

First claim

The invention claimed is:

1. An electrical contactor comprising:
a first terminal having a fixed member with at least one fixed electrical contact;
a second terminal;
at least one movable electrical contact in electrical communication with the second terminal;
a dual-coil actuator having a first drive coil drivable to open and close the movable and fixed electrical contacts, and a second non-drive coil feedback connected to induce a reverse flux to temper and stabilize a net flux, thereby enabling control of a delay time of the opening and closing electrical contacts so as to be at or adjacent to a zero-crossing of an associated AC load current waveform;
a busbar in electrical communication with the second terminal and to which an electrically-conductive movable arm is mounted at or adjacent to a distal end thereof, the at least one movable electrical contact being on the movable arm,
wherein a further electrically-conductive movable arm is mounted to the busbar, a further said movable electrical contact being on the further movable arm, and
wherein the first said movable arm is preformed and preloaded to be biased towards the said at least one fixed electrical contact in the absence of a separating force, and the said further movable arm is preformed and preloaded to be biased away from the said at least one fixed electrical contact in the absence of a closing force.

Assignees

• Johnson Electric Sa

Inventors

• Connell Richard Anthony

Classifications

• H01H51/2272

  comprising rockable armature, rocking movement around central axis parallel to the main plane of the armature (H01H51/2227 takes precedence) · CPC title

• H01H50/44

  Magnetic coils or windings · CPC title

• H01H47/226

  for bistable relays · CPC title

• H01H51/2227

  in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit (H01H51/2209 takes precedence) · CPC title

• H01H7/16 Primary

  Devices for ensuring operation of the switch at a predetermined point in the AC cycle (circuit arrangements H01H9/56) · CPC title