Fan drive gear system electrical conditioning circuit for hybrid electric gas turbine engine

Patent metadata

Field	Value
Publication number	US-10801443-B2
Application number	US-201816152488-A
Country	US
Kind code	B2
Filing date	Oct 5, 2018
Priority date	Oct 5, 2018
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A hybrid gas turbine engine comprises a turbine, a compressor, and a gear system that is driven by the turbine where the gear system includes a sun gear, a ring gear and a plurality of planet gears, where the ring gear has a ring gear radius of RRing gear and the sun gear has a sun gear radius of RSun gear such that the gear system provides a reduction ratio of RRing gear/RSun gear. A fan is driven by the ring gear, and a generator is driven by the ring gear and provides a generator output signal. A power circuit receives the generator output signal and provides a gain RRing gear/RSun gear to the generator output signal and provides a gain signal indicative thereof to an electrical load.

First claim

What is claimed is:

1. A hybrid gas turbine engine, comprising:
a turbine;
a compressor;
a gear system that is driven by the turbine where the gear system includes a sun gear, a ring gear and a plurality of planet gears, where the ring gear has a ring gear radius of R Ring gear and the sun gear has a sun gear radius of R Sun gear such that the gear system provides a reduction ratio of R Ring gear /R Sun gear ;
a fan driven by the ring gear;
a generator that is driven by the ring gear and provides a generator output signal;
a power circuit that receives the generator output signal and provides an electrical gain R Ring gear /R Sun gear to the generator output signal and provides a gain signal indicative thereof; and
an electrical load that receives the gain signal.

2. The hybrid gas turbine engine of claim 1 , where the electrical load comprises a motor that drives the compressor.

3. The hybrid gas turbine engine of claim 2 , where the electrical load further comprises a battery located electrically parallel to the motor.

4. The hybrid gas turbine engine of claim 3 , where the power circuit comprises at least one operational amplifier that receives the generator output signal and applies the electrical gain R Ring gear /R Sun gear to generate the gain signal.

5. The hybrid gas turbine engine of claim 3 , where the power circuit comprises a plurality of operational amplifiers that receive the generator output signal and each operational amplifier among the plurality of operational amplifiers applies the electrical gain R Ring gear /R Sun gear to generate the gain signal.

6. A hybrid gas turbine engine, comprising:
a turbine;
a compressor;
a gear system that is driven by the turbine where the gear system includes a sun gear, a plurality of planet gears configured to rotate and spaced apart by a planet carrier configured to rotate in a direction common to the sun gear, and a non-rotating ring gear, where the non-rotating ring gear has a ring gear radius of R Ring gear and the sun gear has a sun gear radius of R Sun gear such that the gear system provides a reduction ratio of (1+R Ring gear /R Sun gear );
a fan driven by the planet carrier;
a generator that is driven by the planet carrier and provides a generator output signal;
a power circuit that receives the generator output signal and provides an electrical gain (1+R Ring gear /R Sun gear ) to the generator output signal and provides a gain signal indicative thereof; and
an electrical load that receives the gain signal.

7. The hybrid gas turbine engine of claim 6 , where the electrical load comprises a motor that drives the compressor.

8. The hybrid gas turbine engine of claim 7 , where the electrical load further comprises a battery located electrically parallel to the motor.

9. The hybrid gas turbine engine of claim 8 , where the power circuit comprises at least one operational amplifier that receives the generator output signal and applies the electrical gain (1+R Ring gear /R Sun gear ) to generate the gain signal.

10. The hybrid gas turbine engine of claim 8 , where the power circuit comprises a plurality of operational amplifiers that receive the generator output signal and each operational amplifier among the plurality of operational amplifiers the electrical gain (1+R Ring gear /R Sun gear ) to generate the gain signal.

11. A hybrid gas turbine engine, comprising:
a turbine;
a compressor;
a gear system that is driven by the turbine where the gear system includes a non-rotating sun gear, a ring gear, and a plurality of planet gears configured to rotate and spaced apart by a planet carrier configured to rotate in a direction common to the ring gear, where the ring gear has a ring gear radius of R Ring gear and the non-rotating sun gear has a sun gear radius of R Sun gear such that the gear system provides a reduction ratio of (1+R Sun gear /R Ring gear );
a fan driven by the planet carrier;
a generator that is driven by the planet carrier and provides a generator output signal;
a power circuit that receives the generator output signal and provides an electrical gain (1+R Sun gear /R Ring gear ) to the generator output signal and provides a gain signal indicative thereof; and
an electrical load that receives the gain signal.

12. The hybrid gas turbine engine of claim 11 , where the electrical load comprises a motor that drives the compressor.

13. The hybrid gas turbine engine of claim 12 , where the electrical load further comprises a battery located electrically parallel to the motor.

14. The hybrid gas turbine engine of claim 13 , where the power circuit comprises at least one operational amplifier that receives the generator output signal and applies the electrical gain (1+R Sun gear /R Ring gear ) to generate the gain signal.

15. The hybrid gas turbine engine of claim 13 , where the power circuit comprises a plurality of operational amplifiers that receive the generator output signal and each operational amplifier among the plurality of operational amplifiers applies the electrical gain (1 R Sun gear /R Ring gear ) to generate the gain signal.

Assignees

• United Technologies Corp
• Raytheon Tech Corp

Inventors

• Kupratis Daniel B
• Wood Coy Bruce

Classifications

• B64D27/33

  Hybrid electric aircraft · CPC title

• F05D2220/76

  an electrical generator · CPC title

• F01D13/00

  Combinations of two or more machines or engines (F01D15/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H) · CPC title

• F05D2260/40311

  of the epicyclical, planetary or differential type · CPC title

• F02K5/00 Primary

  Plants including an engine, other than a gas turbine, driving a compressor or a ducted fan · CPC title