Linear faraday induction generator for the generation of electrical power from ocean wave kinetic energy and arrangements thereof

• US 9,644,601 B2
• Filed: 09/22/2015
• Issued: 05/09/2017
• Est. Priority Date: 10/29/2012
• Status: Active Grant

• Current Assignee: SLP Consultants, Inc.
• Original Assignee: Energystics, LTD
• Inventors: Phillips, Reed E.
• Primary Examiner(s): Patel, Tulsidas C
• Assistant Examiner(s): MIKAILOFF, STEFAN
• Application Number:
  US14/861,344
• Publication Number:
  US 20160010619A1
• Time in Patent Office: 595 Days
• CPC Class Codes: F03B 13/16 using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
• CPC Class Codes: F03B 13/1855 where the connection between wom and conversion system takes tension and compression F03B13/187, F03B13/1875 take precedence
• CPC Class Codes: F03B 13/188 and the wom is flexible or deformable
• CPC Class Codes: F05B 2220/707 of the linear type
• CPC Class Codes: F05B 2240/40 Use of a multiplicity of similar components
• CPC Class Codes: H01F 7/0273 Magnetic circuits with PM for magnetic field generation
• CPC Class Codes: H02K 2203/00 Specific aspects not provided for in the other groups of this subclass relating to the windings
• CPC Class Codes: H02K 35/00 Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit arrangements for handling mechanical energy structurally associated with generators H02K7/00, e.g. H02K7/06
• CPC Class Codes: H02K 35/02 with moving magnets and stationary coil systems
• CPC Class Codes: H02K 7/1876 with reciprocating, linearly oscillating or vibrating parts
• CPC Class Codes: H02M 7/064 with several outputs
• CPC Class Codes: H02M 7/066 particular circuits having a special characteristic
• CPC Class Codes: Y02E 10/30 Energy from the sea, e.g. using wave energy or salinity gradient

Abstract

A linear generator includes a permanent magnet array having at least two magnets arranged end-to-end. A set of conductive coils is arranged around the permanent magnet array. A four-phase full wave rectifier is configured to accept alternating current inputs from the set of conductive coils and to produce one or more direct current outputs. A summing circuit is configured to aggregate the one or more direct current outputs from the rectifier to produce a combined, rectified direct current output.

Claims

1. A linear generator, comprising:

a permanent magnet array, comprising;

a plurality of magnets affixed end-to-end, each of said plurality of magnets comprising an internal central channel, wherein the plurality of magnets are oriented such that like poles of the magnets are disposed adjacently;

a plurality of pole pieces positioned both at ends of the permanent magnet array and between adjacent magnets, each of said plurality of pole pieces comprising a threaded, internal central channel; and

a threaded support cylinder positioned within the central channels of both the plurality of magnets and the plurality of pole pieces, wherein the plurality of magnets are affixed by mechanical compression by the plurality of pole pieces engaging with threads of the threaded support cylinder;

a set of conductive coils arranged around the permanent magnet array;

a four-phase full wave rectifier configured to accept inputs of alternating current from the set of conductive coils and to produce one or more direct current outputs; and

a summing circuit configured to aggregate the one or more direct current outputs from the rectifier to produce a combined, rectified direct current output.

2. The linear generator of claim 1, wherein the four-phase full wave rectifier comprises Schottky diodes.

3. The linear generator of claim 1, wherein the four-phase full wave rectifier is a bridge rectifier, wherein first ends of each respective conductive coil in the set of conductive coils is are tied together and a second end of each conductive coil feeds a rectifier diode network.

4. The linear generator of claim 1, wherein the four-phase full wave rectifier comprises two full wave center tapped rectifier circuits, a first tapped rectifier circuit of the two tapped rectifier circuits is configured to separate out a positive half cycle for each phase and a second tapped rectifier circuit of the two tapped rectifier circuits is configured to separate out a negative half cycle for each phase.

5. The linear generator of claim 4, wherein the four-phase full wave rectifier produces a bipolar output.

6. The linear generator of claim 1, wherein the summing circuit is a current summing circuit with a plurality of inputs.

7. The linear generator of claim 6, wherein the current summing circuit comprises a set of monolithic direct current to direct current voltage converters connected in series between a pair of current steering Schottky diodes.

8. The linear generator of claim 1, wherein the summing circuit is a voltage summing circuit with a plurality of inputs.

9. The linear generator of claim 1, further comprising a plurality of additional sets of conductive coils and a respective rectifier for each set of the additional sets of conductive coils.

10. The linear generator of claim 9, wherein the summing circuit receives inputs from each of the rectifiers.

11. The linear generator of claim 1, wherein the set of conductive coils comprises four subsets of a plurality of conductive coils, with each coil in a respective subset being electrically connected in series with other coils in the respective subset, each subset being connected to an input of the four-phase full-wave rectifier.

12. The linear generator of claim 1, wherein the set of conductive coils comprises a plurality of subsets of four conductive coils per subset, with each subset of four conductive coils feeding a respective summing circuit via a respective four-phase full wave rectifier circuit.

13. The linear generator of claim 12, further comprising a second-layer summing circuit configured to sum outputs of each of the respective summing circuits for respective subsets of four conductive coils.

14. The linear generator of claim 13, wherein the second-layer summing circuit is a summing circuit with a plurality of inputs configured to produce a single direct current output.

15. An array of linear generators, comprising:

a plurality of individual linear generators, each having a single direct current output and each comprising;

a permanent magnet array comprising;

a plurality of magnets affixed end-to-end, each of said plurality of magnets comprising an internal central channel, wherein the plurality of magnets are oriented such that like poles of the magnets are disposed adjacently;

a plurality of pole pieces positioned both at ends of the permanent magnet array and between adjacent magnets, each of said plurality of pole pieces comprising a threaded, internal central channel; and

a threaded support cylinder positioned within the central channels of both the plurality of magnets and the plurality of pole pieces, wherein the plurality of magnets are affixed by mechanical compression by the plurality of pole pieces engaging with threads of the threaded support cylinder;

a set of conductive coils arranged around the permanent magnet array, the set comprising four subsets of a plurality of conductive coils, with each coil in a respective subset being electrically connected in series with other coils in the respective subset;

a four-phase full wave rectifier configured to accept inputs of alternating current from each subset of conductive coils and to produce one or more direct current outputs; and

a summing circuit configured to aggregate the one or more direct current outputs from the rectifier to produce a combined, rectified direct current output.

16. The array of linear generators of claim 15, further comprising an array-level summing circuit configured to aggregate the combined direct current outputs of the plurality of individual linear generators to produce a single direct current output for the array.

17. A system of generator arrays, comprising:

a plurality of arrays of linear generators as recited in claim 16; and

a system-level summing circuit configured to aggregate the single direct current outputs for the plurality of arrays to produce a single direct current system output.

18. An array of linear generators, comprising:

a plurality of individual linear generators, each having a single direct current output and each comprising;

a permanent magnet array comprising;

a plurality of magnets affixed end-to-end, each of said plurality of magnets comprising an internal central channel, wherein the plurality of magnets are oriented such that like poles of the magnets are disposed adjacently;

a plurality of pole pieces positioned both at ends of the permanent magnet array and between adjacent magnets, each of said plurality of pole pieces comprising a threaded, internal central channel; and

a threaded support cylinder positioned within the central channels of both the plurality of magnets and the plurality of pole pieces, wherein the plurality of magnets are affixed by mechanical compression by the plurality of pole pieces engaging with threads of the threaded support cylinder;

a set of conductive coils arranged around the permanent magnet array, the set comprising a plurality of subsets of four conductive coils each;

a plurality of four-phase full wave rectifiers configured to accept inputs of alternating current from a respective subset of four conductive coils and to produce one or more direct current outputs; and

a summing circuit configured to aggregate the one or more direct current outputs from the rectifiers to produce a combined, rectified direct current output.

19. The array of linear generators of claim 18, further comprising an array-level summing circuit configured to aggregate the combined direct current outputs of the plurality of individual linear generators to produce a single direct current output for the array.

20. A system of generator arrays, comprising:

a plurality of arrays of linear generators as recited in claim 19; and

a system-level summing circuit configured to aggregate the single direct current outputs for the plurality of arrays to produce a single direct current system output.