Circuit for direct energy extraction from a charged-particle beam

Patent metadata

Field	Value
Publication number	US-9343189-B2
Application number	US-200913001589-A
Country	US
Kind code	B2
Filing date	Jun 29, 2009
Priority date	Jun 27, 2008
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

Provided herein is a fusion energy extraction circuit (FEEC) device having a grid-tied bidirectional converter and a resonant converter. The resonant converter can include an inverse cyclotron converter with two or more or quadruple plates and a plurality of circuit switches. The bidirectional converter can include a three-phase grid-tied converter. The FEEC device is capable of decelerating plasma particle beams, thereby extracting the energy from the deceleration, converting the extracted energy to electric energy, and sending the electric energy to a power grid.

First claim

What is claimed is:

1. An energy extraction circuit for extracting energy from a charged-particle beam, comprising:
a bidirectional converter couplable to an electrical power grid; and
a bidirectional resonant converter comprising a multi-pole inverse cyclotron converter, an inductor electrically coupled to the multi-pole inverse cyclotron converter, and a plurality of circuit switches electrically coupled to the inductor and the multi-pole inverse cyclotron converter and electrically coupled to the bidirectional converter, the multi-pole inverse cyclotron converter includes two or more elongated plates with arcuate cross-sections forming an elongated cylindrical chamber with each of the two or more elongated plates forming a cylindrical segment of the cylindrical chamber with two or more elongated gaps formed between elongated edges of adjacent plates of the two or more plates and axially extending parallel to a longitudinal axis of the cylindrical chamber, wherein the two or more plates function as a capacitor which combined with the inductor forms a resonant tank, wherein the plurality of circuit switches are configured to form a bridge that chops direct current voltage received from the bidirectional converter to a pulse waveform, wherein the multi-pole inverse cyclotron converter when current is applied to the two or more elongated plates, forms a multi pole electric field across the gaps between the plates that decelerates charged particles of charged-particle beams passing through the cylindrical chamber to extract electric energy from the kinetic energy of the charged particles, wherein converted electrical energy received from the grid-tied bidirectional converter establishes the resonance of the multi-pole inverse cyclotron converter wherein the bidirectional converter and the plurality of circuit switches form an ac-to-ac converter between the resonant tank and the electrical power grid.

2. The circuit of claim 1 wherein the bidirectional converter is configured to interface a grid ac voltage.

3. The circuit of claim 1 wherein the bidirectional converter is configured to function as an ac/dc rectifier during start up mode of operation and as a dc/ac grid-tied inverter during generation mode of operation.

4. The circuit of claim 1 wherein the bidirectional converter is configured to operate with at least one of unity power factor, leading phase, or lagging phase.

5. The circuit of claim 2 wherein the bidirectional converter is controlled to achieve bidirectional power and reactive power flow.

6. The circuit of claim 5 wherein the bidirectional resonant converter is configured by an H-bridge or Half-bridge resonant converter.

7. The circuit of claim 5 wherein the bidirectional resonant converter is regulated by a feedback control loop having a resonant voltage sensing circuit, a compensator, a modulation generator, and an interface to the resonant converter.

8. The circuit of claim 7 wherein the modulation generator is a pulse width modulation generator.

9. The circuit of claim 7 wherein the modulation generator is a phase shift modulation generator.

10. The circuit of claim 7 wherein the modulation generator adjusts the resonant voltage of the resonant converter.

11. A method for extracting energy from charged particles of charged-particle beams passing through a bidirectional resonant converter in a system comprising a bidirectional resonant converter and a bidirectional converter, comprising the steps of:
receiving electrical energy from a utility grid by a bidirectional converter of the system comprising a resonant converter electrically coupled to a bidirectional converter coupled to the utility grid, wherein the bidirectional resonant converter comprises a multi-pole inverse cyclotron converter, an inductor electrically coupled to the multi-pole inverse cyclotron converter, and a plurality of circuit switches electrically coupled to the inductor and the multi-pole inverse cyclotron converter and electrically coupled to the bidirectional converter, the multi-pole inverse cyclotron converter includes two or more elongated plates with arcuate cross-sections forming an elongated cylindrical chamber with each of the two or more elongated plates forming an elongated cylindrical segment of the cylindrical chamber with two or more elongated gaps formed between elongated edges of adjacent plates of the two or more plates and axially extending parallel to a longitudinal axis of the cylindrical chamber, wherein the two or more plates function as a capacitor which combined with the inductor forms a resonant tank, wherein the plurality of circuit switches are configured to form a bridge that chops direct current voltage to a pulse waveform, wherein the multi-pole inverse cyclotron converter when current is applied to the two or more elongated plates, forms a multi pole electric field across the gaps between the plates that decelerates charged particles of charged-particle beams passing through the cylindrical chamber;
establishing the resonance of the multi-pole inverse cyclotron converter with converted electrical energy received from the bidirectional converter and the plurality of switches, wherein the bidirectional converter and the plurality of circuit switches form an ac-to-ac converter between the resonant tank and the electrical power grid, and
exciting a multi-pole electric field across the gaps of the two or more plates.

12. The method of claim 11 further comprising the steps of:
receiving charged-particle beams in the bidirectional resonant converter;
decelerating the charged particles of the charged-particle beams to extract electric energy from the kinetic energy of the charged particles; and
collecting lost energy from decelerating the charged particles in the form of image current by the two or more elongated plates.

13. The method of claim 12 further comprising the steps of:
flowing image current through the bidirectional resonant converter; and
flowing image current back to the utility grid through the bidirectional converter.

14. The method of claim 12 further comprising the steps of sending the extracted electric energy back to the utility grid.

Assignees

• Smedley Keyue
• Wessel Frank J
• Gu Mingying
• Jeong In Wha
• Univ California

Inventors

• Smedley Keyue
• Wessel Frank J
• Gu Mingying
• Jeong In Wha

Classifications

• H02M5/4585

  having a rectifier with controlled elements · CPC title

• H02M5/46

  by dynamic converters · CPC title

• H02M1/36

  Means for starting or stopping converters · CPC title

• H02M5/45

  using semiconductor devices only · CPC title

• H05H15/00

  Methods or devices for acceleration of charged particles not otherwise provided for {, e.g. wakefield accelerators} · CPC title