Energy storage module with XRAM current multiplier

Patent metadata

Field	Value
Publication number	US-11356080-B2
Application number	US-202117204005-A
Country	US
Kind code	B2
Filing date	Mar 17, 2021
Priority date	Jan 9, 2020
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

An electrical machine includes as part of its stator XRAM windings for multiplying current output of the machine. The XRAM windings are coupled to switching elements that are configured to produce current multiplication for output to an external load. The XRAM windings may be in slots in the stator, or may be elsewhere in the stator, operatively coupled to other windings in the stator. The stator may be operatively coupled to a rotor and hence to an inertial energy source, such as a flywheel on the same shaft as the elements of the electrical machine. Short circuiting of select windings of the machine can advantageously cause a shifting and concentration of a machine airgap flux of the machine over other windings, and increasing their magnetic storage energy.

First claim

What is claimed is:

1. A dynamo-electric machine comprising:
an electromagnetic structure that includes:
alternating current primary windings; and
polyphase secondary windings; and

a switching array;
wherein the primary windings magnetize the dynamo-electric machine;
wherein the electromagnetic structure provides power to the switching array, with the switching array configured to produce current multiplication for output to an external load.

2. The machine of claim 1 , further comprising one or more energy storage devices operatively coupled to the electromagnetic structure.

3. The machine of claim 2 , wherein the one or more energy storage devices includes an electro-kinetic energy storage device.

4. The machine of claim 3 , wherein the electro-kinetic energy storage device is a flywheel.

5. The machine of claim 4 , wherein the flywheel is mechanically connected to the electromagnetic structure.

6. The machine of claim 4 , wherein the flywheel is on a same shaft as other elements of the machine.

7. The machine of claim 2 , wherein the one or more energy storage devices includes an electrochemical excitation energy source which is bidirectional.

8. The machine of claim 2 , wherein the one or more energy storage devices includes an electrostatic energy source which is bidirectional.

9. The machine of claim 2 , wherein the one or more energy storage devices includes an electromagnetic source which is bidirectional.

10. The machine of claim 1 ,
further comprising tertiary windings operatively coupled to the primary windings and the secondary windings; and
wherein the tertiary windings provide inductive energy storage.

11. The machine of claim 10 , wherein in operation the tertiary windings are configurable in a series connection for energy storage, and are reconfigurable in a parallel connection.

12. The machine of claim 1 , further comprising tertiary windings operatively coupled to the primary windings and the secondary windings such that short circuiting of the primary windings or the secondary windings causes a shifting and concentration of a machine airgap flux of the machine over tertiary windings, which induces a direct or transient current in the tertiary windings, which is used for inductive energy storage and to effect a current multiplication to the external load.

13. The machine of claim 12 , wherein the short circuiting of the primary windings or the secondary windings causes a shifting or concentration of the machine airgap flux from a direct magnetic axis to a quadrature magnetic axis.

14. The machine of claim 12 ,
wherein there are three or more distinct levels of airgap radially-directed magnetic flux over a repeatable section of the airgap periphery, with the primary windings and the secondary windings magnetically coupled by a first level flux density, and the tertiary windings coils coupled by a second level of flux density, and counter-pulse coils that are coupled by a third level of flux density.

15. An alternating-current dynamo-electric machine comprising:
a stator assembly;
a rotor assembly; and
windings in the stator assembly;
wherein the windings in the stator assembly include:
main windings for producing output alternating current; and
pulsed winding coils configured for producing a multiplied output that is greater than the output current of the main windings.

16. The machine of claim 15 , wherein the main windings and the pulsed winding coils are in alternate slots of the stator assembly, and drive different respective magnetic circuits.

17. The machine of claim 15 , further comprising:
counter-pulse coils on an outer periphery of a stator magnetic core of the stator assembly; and
circuitry coupled to the counter-pulse coils.

18. The machine of claim 15 , wherein the pulsed winding coils are positioned outside of slots of the stator magnetic core that contain the main windings.

19. The machine of claim 15 , wherein the main windings include generating windings that are operatively coupled to a rectifier to selectively store energy in the pulsed winding coils, to allow selective control of high-current output from the pulsed winding coils.

20. The machine of claim 15 , wherein the main windings include generating windings that are operatively coupled to a rectifier to selectively store energy in the pulsed winding coils, to allow high-energy output from the pulsed winding coils to be selected or controlled in discrete steps.

Assignees

• Raytheon Co

Inventors

• Kuznetsov Stephen

Classifications

• H02P2207/07

  Doubly fed machines receiving two supplies both on the stator only wherein the power supply is fed to different sets of stator windings or to rotor and stator windings · CPC title

• H02K7/02 Primary

  Additional mass for increasing inertia, e.g. flywheels · CPC title

• Y02E60/16

  Mechanical energy storage, e.g. flywheels or pressurised fluids · CPC title

• H02K11/0094 Primary

  Structural association with other electrical or electronic devices · CPC title

• H02K7/025

  for power storage · CPC title