System and method for filtering multiple adverse characteristics from a power supply source

• US 6,744,613 B2
• Filed: 03/01/2002
• Issued: 06/01/2004
• Est. Priority Date: 03/01/2002
• Status: Expired due to Term

• Current Assignee: Electronic Systems Protection Incorporated (Ametek Incorporated)
• Original Assignee: Andrew Benton, Michael Mccook
• Inventors: Benton, Andrew, McCook, Michael
• Primary Examiner(s): Ngo, Hung V.
• Application Number:
  US10/086,251
• Publication Number:
  US 20030165035A1
• Time in Patent Office: 823 Days
• Field of Search: 361/57, 361/111, 361/118
• US Class Current: 361/111
• CPC Class Codes: H02H 9/001 limiting speed of change of electric quantities, e.g. soft switching on or off progressive control of electronic switches for eliminating interferences H03K17/16
• CPC Class Codes: H02H 9/005 avoiding undesired transient conditions

Abstract

A system and method for conditioning a power transmission, thereby eliminating adverse characteristics from the power transmission. The system selectively includes a voltage surge protector, an EMI/RFI filter and at least one inrush current suppressor integrally formed into a single system. To condition an incoming power transmission, the power transmission is passed through the voltage surge protector to eliminate any abnormal voltage spikes. The power transmission is then passed through an improved EMI/RFI filter having a dual output. The outputs of the EMI/RFI filter lead into a first inrush current suppressor. The inrush current suppressor limits the amperage of the power transmission for a predetermined period of time and then permits unrestricted current flow.

Claims

1. A power conditioning system for conditioning a power transmission, said system comprising:

a voltage surge protector for eliminating voltage spikes over a predetermined threshold in said power transmission, thereby producing a surge protected power transmission;

a filter that receives said surge protected power transmission and reduces electromagnetic interference and radio frequency interference in said surge protected power transmission, thereby producing a filtered power transmission;

at least one inrush current suppressor that receives said filtered power transmission and limits the current associated with said filtered power transmission, thereby producing a conditioned power transmission.

2. The system according to claim 1, wherein each said inrush current suppressor has at least one output port, and wherein each said inrush current suppressor has an activated condition, where said at least one output port receives said conditioned power transmission and a deactivated condition where said at least one output port does not receive said conditioned power transmission.

3. The system according to claim 2, wherein each said inrush current suppressor changes between said deactivated condition and said activated condition upon receipt of an incoming control signal and produces an outgoing control signal a predetermined time after said incoming control signal is received.

4. The system according to claim 3, further including multiple inrush current suppressors, wherein each of said inrush current suppressors is in a cascading arrangement wherein said outgoing control signal for one inrush current suppressor is used as said incoming control signal for another of said inrush current suppressors.

5. The system according to claim 4, wherein said multiple inrush current suppressors include a first inrush surge protector and at least one subsequent surge protector.

6. The system according to claim 5, further including a remote activation device coupled to said first inrush surge protector, wherein said remote activation device is used to selectively change said first surge protector device between said activated condition and said deactivated condition.

7. The system according to 3, wherein said predetermined time is between 0.1 seconds and 1.0 second.

8. The system according to claim 1, wherein said voltage surge protector, said filter and said at least one inrush current suppressor are contained in a single self-contained unit.

9. The system according to claim 1, wherein each said inrush current suppressor contains a main resistor through which said filtered power transmission is passed when each said inrush current suppressor is in said activated condition.

10. The system according to claim 1 wherein each said inrush current suppressor contains circuitry that bypasses said filtered transmission around said main resistor after each said inrush current suppressor has been activated for a predetermined period of time.

11. The system according to claim 1, wherein said filter includes a mutual inductor having two outgoing leads and a ferrite bead is disposed in series with each of said outgoing leads so that said protected power transmission passes through said ferrite beads after passing through said mutual inductor.

12. The system according to claim 1, wherein said inrush current suppressor, includes:

an output port;

an input port;

a first circuit path extending between said input port and said output port;

a second circuit path extending between said input port and said output port;

at least one current limiting resistor disposed in said first circuit path that limits electricity flowing through said first circuit path to a predetermined amperage;

a first relay disposed in said first circuit path for selectively opening and closing said first circuit path;

a second relay disposed in said second circuit path for selectively opening and closing said second circuit path;

circuitry coupled to said first relay and said second relay that initially closes said first circuit path and opens said second circuit path for a predetermined period of time, and then opens said first circuit path and closes said second circuit path.

13. The system according to claim 12, wherein said predetermined period of time is between ½

second and 5 seconds.

14. The system according to claim 12, wherein said circuitry initially closes said first circuit path upon receiving a control signal.

15. The system according to claim 14, wherein said circuitry creates said control signal after said second circuit path closes.