Optical power converter

• US 8,552,356 B2
• Filed: 10/28/2010
• Issued: 10/08/2013
• Est. Priority Date: 03/01/2010
• Status: Expired due to Fees

• Current Assignee: Aerojet Rocketdyne Of De, Inc. (L3Harris Technologies, Inc.)
• Original Assignee: Pratt & Whitney Rocketdyne Incorporated (L3Harris Technologies, Inc.)
• Inventors: Hertel, Thomas A.
• Primary Examiner(s): Epps, Georgia Y
• Assistant Examiner(s): WILLIAMS, DON J
• Application Number:
  US12/913,841
• Publication Number:
  US 20110210236A1
• Time in Patent Office: 1,076 Days
• Field of Search: 250/205, 250/552, 250/553, 315/383, 315/409, 362611-613
• US Class Current: 250/214.R
• CPC Class Codes: H04B 10/807 Optical power feeding, i.e. transmitting power using an optical signal
• CPC Class Codes: H05B 45/37 Converter circuits

Abstract

An optical voltage converter has an emitter array and a receiver array. Each of the emitter array and the receiver array have at least one LED. The LEDs are arranged such that light from the emitter LED directly strikes the receiver LED.

Claims

1. An optical converter comprising:

an emitter array having a plurality of emitter units in a first circuit arrangement and operable to emit light in response to a voltage input; and

a receiver array arranged to receive said light, said receiver array having a plurality of receiver units in a second circuit arrangement distinct from said first circuit arrangement with respect to an electrical interconnection between said receiver units and an electrical interconnection between said emitter units such that said receiver array is operable to generate a voltage output having a voltage level different than a voltage level of said voltage input to said emitter array by greater than efficiency losses, thereby transforming said voltage input into a voltage output of a different voltage level using said optical converter.

2. The optical converter of claim 1, wherein said plurality of receiver units is an array of photovoltaic cells.

3. The optical converter of claim 2, wherein each of said photovoltaic cells in said array of photovoltaic cells is a narrow band photovoltaic cell.

4. The optical converter of claim 3, wherein each said narrow band photovoltaic cell has a frequency band equal to a frequency band of a corresponding one of said plurality of emitter units.

5. The optical converter of claim 1, wherein light from said emitter array travels from said emitter array to said receiver array without being redirected.

6. The optical converter of claim 1, wherein each of said plurality of receiver units is an receiver LED and wherein each of said plurality of emitter units is an emitter LED.

7. The optical converter of claim 6, wherein each of said emitter array and said receiver array have the same number of LEDs.

8. The optical converter of claim 6, wherein each of said plurality of emitter units corresponds to at least one of said plurality of receiver units, wherein each of said plurality of emitter units comprises a light emitter portion, each of said plurality of receiver units comprises a light emitter portion, and wherein each of said light emitter portions of said plurality emitter units faces said light emitter portion of said corresponding one of said plurality of receiver units.

9. The optical converter of claim 6, wherein said plurality of emitter LEDs are arranged in a bridge rectifier arrangement, comprising a plurality positive voltage emitter LEDs and a plurality of negative voltage emitter LEDs, and wherein said plurality of receiver LEDs are arranged in a first grouping of parallel configured receiver LEDs and a second grouping of parallel configured receiver LEDs.

10. The optical converter of claim 9, wherein each receiver LED in said first grouping of parallel configured LEDs corresponds to one of said positive voltage emitter LEDs and each receiver LED in said second grouping of parallel configured LEDs corresponds to one of said negative voltage emitter LEDs.

11. The optical converter of claim 10, wherein said first grouping of parallel configured LEDs and said second grouping of parallel configured LEDs are arranged in series with each other.

12. The optical converter of claim 10, wherein said first grouping of parallel configured LEDs and said second grouping of parallel configured LEDs are arranged in parallel with each other.

13. The optical converter of claim 6, wherein said emitter LEDs and said receiver LEDs comprise a substantially identical light emission wavelength.

14. The optical converter of claim 13, wherein said emitter LEDs and said receiver LEDs comprise substantially the same material composition.

15. The optical converter of claim 13, wherein said emitter LEDs and said receiver LEDs comprise ultra-violet LEDs.

16. The optical converter of claim 1, wherein said emitter array and said receiver array are separated by a gap.

17. The optical converter of claim 16, wherein said gap comprises a solid capable of transmitting light.

18. The optical converter of claim 1, wherein said plurality of emitter array units is an array of emitter LEDs that are connected in an electrically parallel configuration, and said plurality of receiver units is an array of receiver LEDs that are configured in an electrically serial configuration.

19. The optical converter of claim 18, wherein said voltage output, less efficiency, is greater than said voltage input to said emitter array.

20. The optical converter of claim 1, wherein said plurality of emitter array units is an array of emitter LEDs that are connected in an electrically serial configuration, and said plurality of receiver units is an array of receiver LEDs that are configured in an electrically parallel configuration.

21. The optical converter of claim 20, wherein said voltage output, less efficiency losses, is less than said voltage input to said emitter array.

22. A method for controlling power electronics using a low voltage control signal comprising the steps of:

receiving a low voltage control signal from a controller into an optical DC/DC converter;

transforming said low voltage control signal into a power voltage control signal of a different voltage level using said optical DC/DC converter, said transforming including transmitting said low voltage signal from an emitter array of said optical DC/DC converter to a receiver array of said optical DC/DC converter, said emitter array having a plurality of emitter units in a first circuit arrangement and operable to emit light and said receiver array arranged to receive said light, said receiver array having a plurality of receiver units in a second circuit arrangement distinct from said first circuit arrangement with respect to an electrical interconnection between said receiver units and an electrical interconnection between said emitter units; and

transmitting said power voltage control signal to a power electronics device, thereby controlling said power electronics device.

23. The method of claim 22, wherein said step of passing a low voltage control signal through an optical DC/DC converter further comprises the steps of:

passing said low voltage control signal through said plurality of emitter units thereby causing said emitter units to emit light; and

receiving light emitted from said emitter units at said plurality of receiver units thereby causing each of said receiver units to generate a current.

24. The method of claim 23, wherein each of said plurality of emitter units are connected in parallel and each of said receiver units are connected in series, thereby causing said DC/DC converter to have an output voltage that is equal to said input voltage times the number of receiver units, less efficiency.

25. The method of claim 23, wherein each of said emitter units corresponds to a photoelectric receiver unit such that light from said emitter unit directly strikes said photoelectric receiver unit.

26. The method of claim 23, wherein said light emitted from said emitter unit comprises at least an ultra-violet frequency.