Ultrafast electromechanical disconnect switch having contact pressure adjustment and switching chamber

Patent metadata

Field	Value
Publication number	US-10340109-B2
Application number	US-201816196800-A
Country	US
Kind code	B2
Filing date	Nov 20, 2018
Priority date	Jan 23, 2014
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

An ultrafast electromechanical switch having a drive mechanism comprising three non-movable contacts, an actuator and two movable contacts. The switch further including a switching chamber to provide a self-contained environment that may consist of a high-pressure gas or a vacuum and one or more precision adjustment screws coupled to the non-movable contacts for adjusting the contact pressure. The provided ultrafast electrical (e.g., transfer, disconnect, etc.) switch is simple, compact, clean, exhibits ultralow loss, does not require high energy to operate and is capable of being automatically reset.

First claim

What is claimed is:

1. An electrical transfer or disconnect switch, comprising:
a first non-movable electrical contact coupled to an insulating medium;
a second non-movable electrical contact coupled to said insulating medium;
a third non-movable electrical contact coupled to said insulating medium and positioned between said first non-movable electrical contact and said second non-movable electrical contact to provide conduction between said first non-movable electrical contact and said second non-movable electrical contact when electrically in series;
a first static gap disposed between said first non-movable contact and said third non-movable contact;
a second static gap disposed between said second non-movable contact and said third non-movable contact;
an actuator having a first mounting plate and a second mounting plate, said first mounting plate aligned with said first static gap but positioned at a spaced distance away from said first non-movable contact, said third non-movable contact, and said first static gap; said second mounting plate aligned with said second static gap but positioned at a spaced distance away from said second non-movable contact, said third non-movable contact, and said second static gap;
a first movable contact directly or indirectly coupled to said first mounting plate of said actuator and aligned with said first static gap, said first movable contact contacting said first and third non-movable contacts simultaneously to complete a first series between said first and third non-movable contacts, wherein when said actuator is prompted, said first mounting plate shifts away from said first and third non-movable contacts, such that a first variable gap is formed between said first movable contact and said first and third non-movable contacts, thus breaking or disconnecting said first series between said first and third non-movable contacts, said actuator also releasing contact pressure between said first movable contact and said first and third non-movable contacts;
a second movable contact directly or indirectly coupled to said second mounting plate of said actuator and aligned with said second static gap, said second movable contact contacting said second and third non-movable contacts simultaneously to complete a second series between said second and third non-movable contacts, wherein when said actuator is prompted, said second mounting plate shifts away from said second and third non-movable contacts, such that a second variable gap is formed between said second movable contact and said second and third non-movable contacts, thus breaking or disconnecting said second series between said second and third non-movable contacts, said actuator also releasing contact pressure between said second movable contact and said second and third non-movable contacts, wherein when said actuator is idle or unprompted, said first movable contact is contacting said first and third non-movable contacts and when said second movable contact is contacting said first and second non-movable contacts, an electrical circuit is closed within said electrical transfer or disconnect switch, such that a current flows along a path of travel within said electrical transfer or disconnect switch across said first non-movable contact, said first movable contact, said third non-movable contact, said second movable contact, and said second non-movable contact;
one or more precision adjustment screws coupled to said first, second, and third non-movable contacts for adjusting said first, second, and third non-movable contacts; and
a switching chamber that encloses at least said insulating medium, said first non-movable contact, said second non-movable contact, said third non-movable contact and said actuator, said switching chamber containing vacuum or pressurized gas.

2. An electrical transfer or disconnect switch as in claim 1 , comprising:
said actuator being a piezoelectric actuator.

3. An electrical transfer or disconnect switch as in claim 1 , comprising:
said first static gap positioned on a substantially opposite side of said insulation medium from said second static gap, and said first and second mounting plates forming an elliptical shell configuration about said actuator, such that said first mounting plate faces a substantially opposite direction from said second mounting plate.

4. An electrical transfer or disconnect switch as in claim 3 , wherein longitudinal ends of said actuator in said elliptical shell configuration are flexibly held within slots formed within said insulation medium.

5. An electrical transfer or disconnect switch as in claim 1 , further comprising:
said switch applied to a low current, high voltage system.

6. An electrical transfer or disconnect switch as in claim 1 , further comprising:
said insulation medium further disposed between said first mounting plate and said first movable contact to electrically insulate said first mounting plate and said first movable contact from each other; and
said insulation medium further disposed between said second mounting plate and said second movable contact to electrically insulate said second mounting plate and said second movable contact from each other.

Assignees

• Univ Florida State Res Found Inc

Inventors

• Graber Lukas
• Widener Christopher
• Smith Samantha
• Steurer Michael

Classifications

• H01H57/00 Primary

  Electrostrictive relays; Piezoelectric relays · CPC title

• H01H33/28

  Power arrangements internal to the switch for operating the driving mechanism · CPC title

• H01H33/666

  Operating arrangements · CPC title

• H01H55/00

  Magnetostrictive relays · CPC title

• H01H33/64

  wherein the break is in gas (vacuum switches H01H33/66) · CPC title