Contactor

Patent metadata

Field	Value
Publication number	US-9412547-B2
Application number	US-201114364529-A
Country	US
Kind code	B2
Filing date	Dec 21, 2011
Priority date	Dec 21, 2011
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A contactor includes a contact portion and an actuation portion. The contactor further includes a keeping portion. The keeping portion includes a capacitor structure and uses an electrostatic force between opposite plates of the capacitor structure to keep the contact portion in a contact state or a disconnection state. The electrostatic force generated by an electrostatic latch is used to keep the contactor in a switched-to static state. The contactor has reduced energy consumption in the static state, is convenient to manufacture, and has a low cost.

First claim

What is claimed is:

1. A contactor, comprising:
a contact portion;
a keeping portion, including a capacitor structure, the keeping portion being configured to use an electrostatic force between opposite capacitor plates of the capacitor structure to keep the contact portion in a contact state or a disconnection state; and
an actuation portion, including an electromagnet and an armature, one of the opposite capacitor plates of the capacitor structure being connected to the electromagnet and another one of the opposite capacitor plates of the capacitor structure being connected to the armature,
wherein, upon the actuation portion causing the contact portion to switch to a contact state or a disconnection state, the opposite capacitor plates in the capacitor structure of the keeping portion are capable of carrying charges of opposite polarities or a same polarity, and an electrostatic attractive/repulsive force is generated between the electrodes of the opposite capacitor plates to keep the contact portion in the switched-to contact state or disconnection state.

2. The contactor of claim 1 , wherein
each of the capacitor plates of the capacitor structure includes
an electrode and a dielectric film attached to a surface of the electrode and wherein, after the actuation portion, each of the capacitor plates of the capacitor structure is configured to cause the contact portion to switch to the contact state/disconnection state, the opposite capacitor plates in the capacitor structure of the keeping portion being capable of carrying charges, and an electrostatic force being generated between the electrodes of the capacitor plates to keep the contact portion in the switched-to contact state/disconnection state.

3. The contactor of claim 2 , wherein
the electrode of the capacitor plate is a flexible thin metallic film.

4. The contactor of claim 3 , wherein
the capacitor plate further comprises a substrate, and wherein the flexible thin metallic film electrode is attached to the substrate.

5. The contactor of claim 2 , wherein
the dielectric film is ebonite, polytetrafluoroethylene (PTFE), or ceramics.

6. The contactor of claim 1 , wherein
each of the opposite capacitor plates of the capacitor structure further comprise a substrate, a plurality of protrusion plates being disposed on each of the substrates of the opposite capacitor plates, the plurality of protrusion plates of one of the opposite capacitor plates being capable of meshing with the plurality of protrusion plates of the other one of the opposite capacitor plates, and the electrode being disposed on both surfaces of each of the plurality of protrusion plates; and wherein, after the actuation portion causes the contact portion to switch to the contact state/disconnection state, the electrodes of the protrusion plates of the opposite capacitor plates are capable of carrying charges of opposite polarities or the same polarity, and an electrostatic attractive/repulsive force is generated between adjacent electrodes in a mesh state to keep the contact portion in the switched-to contact state/disconnection state.

Assignees

• Li Ming
• Schärtl Günther
• Siemens Ag

Inventors

• Li Ming
• Schärtl Günther

Classifications

• H01H51/10

  Contacts retained open or closed by a latch which is controlled by an electromagnet · CPC title

• H01G5/145 Primary

  with profiled electrodes · CPC title

• H01H50/546

  for contactors having bridging contacts · CPC title

• H01H50/32

  Latching movable parts mechanically · CPC title

• H01H50/42

  Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement · CPC title