Ultrafast electromechanical disconnect switch

Patent metadata

Field	Value
Publication number	US-10186392-B2
Application number	US-201615214015-A
Country	US
Kind code	B2
Filing date	Jul 19, 2016
Priority date	Jan 23, 2014
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

An ultrafast electrical (e.g., transfer, disconnect, etc.) switch that is simple, compact, does not require high energy to operate, ultralow loss, clean, and capable of being automatically reset. The invention includes a fast electromechanical switch having a drive mechanism integrated into the switching chamber. The integration of the drive mechanism into the switching chamber provides faster contact travel and therefore a faster switching operation. Additionally, the switching chamber is a self-contained environment that may consist of a high-pressure gas or a vacuum. The invention further includes an ultrafast disconnect switch. The invention generally is an integrated piezoelectric-actuator-based mechanical switching mechanism. The mechanism has a central piezoelectric actuator that extends to pull contacts inwards in order to obtain two disconnects within a millisecond or less. Surrounding the piezoelectric actuator is a polymer insulating shell and beyond the shell is the metallic conductor.

First claim

What is claimed is:

1. An electrical transfer or disconnect switch, comprising:
a first electrical feedthrough disposed through an insulating medium, said first electrical feedthrough connected to a first non-movable electrical contact;
a second electrical feedthrough disposed through an insulating medium, said second electrical feedthrough connected to a second non-movable electrical contact;
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, such that a first static gap is disposed between said first non-movable contact and said third non-movable contact and such that a second static gap is disposed between said second non-movable contact and said third non-movable contact;
a first actuator 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;
a second actuator 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 actuator and aligned with said first static gap, such that a first variable gap is formed between said first movable contact and said first and third non-movable contacts,
wherein when said first actuator is prompted, said first movable contact reduces said first variable gap until said first movable contact is contacting said first and third non-movable contacts simultaneously to complete a first series from said first non-movable contact to said third non-movable contact,
said first actuator also generating contact pressure between said first movable contact and said first and third non-movable contacts; and
a second movable contact directly or indirectly coupled to said second actuator and aligned with said second static gap, such that a second variable gap is formed between said second movable contact and said second and third non-movable contacts,
wherein when said second actuator is prompted, said second movable contact reduces said second variable gap until said second movable contact is contacting said second and third non-movable contacts simultaneously to complete a second series from said third non-movable contact to said second non-movable contact,
said second actuator also generating contact pressure between said second movable contact and said second and third non-movable contacts,
wherein when 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.

2. An electrical transfer or disconnect switch as in claim 1 , further comprising:
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, said first movable contact, and said second movable contact,
wherein said switching chamber includes a flange coupled to a vessel.

3. An electrical transfer or disconnect switch as in claim 2 , further comprising:
said first and second electrical feedthroughs being disposed through said flange into an interior of said switching chamber where said first and second electrical feedthroughs contact said first and second non-movable contacts, respectively,
said first and second electrical feedthroughs each containing conductors that connect systems that are separated by a disconnect controlled by said switch.

4. An electrical transfer or disconnect switch as in claim 2 , further comprising:
said switching chamber containing vacuum or pressurized gas.

5. An electrical transfer or disconnect switch as in claim 1 , further comprising:
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.

6. An electrical transfer or disconnect switch as in claim 1 , further comprising:
one or more control signal wires that pass through a control wire feedthrough and are coupled to said first and second actuators for controlling said first and second actuators.

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

8. An electrical transfer or disconnect switch as in claim 1 , further comprising:
said first and second actuators being piezoelectric actuators.

9. An electrical transfer or disconnect switch as in claim 1 , further comprising:
a first insulator positioned between said first actuator and said first movable contact to electrically insulate said first actuator and said first movable contact from each other; and
a second insulator positioned between said second actuator and said second movable contact to electrically insulate said second actuator and said second movable contact from each other.

10. 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; and
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 contact

Assignees

• Univ Florida State Res Found Inc

Inventors

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

Classifications

• H01H33/28

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

• H01H33/64

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

• H01H55/00

  Magnetostrictive relays · CPC title

• H01H57/00 Primary

  Electrostrictive relays; Piezoelectric relays · CPC title

• H01H33/14

  Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc · CPC title