Turbo compounding system

• US 7,893,554 B2
• Filed: 02/28/2008
• Issued: 02/22/2011
• Est. Priority Date: 02/28/2008
• Status: Active Grant

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Shoemaker, Jim, Stahlhut, Ronnie Dean
• Primary Examiner(s): Waks; Joseph
• Application Number:
  US12/072,720
• Publication Number:
  US 20090218815A1
• Time in Patent Office: 1,090 Days
• Field of Search: 290/52, 605/98
• US Class Current: 290/52
• CPC Class Codes: F02B 41/10 in exhaust turbines use of exhaust turbines for charging F02B37/00
• CPC Class Codes: H02P 25/092 Converters specially adapted for controlling reluctance motors
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A turbo compounding system may include a turbo generator having a switched reluctance machine having at least one pole-matched rotor and stator pair, a single phase inverter coupled to the turbo generator and further coupled to a direct current link, an inverter coupled to the direct current link, a motor generator coupled to the inverter.

Claims

1. A system comprising:

a turbo generator having a switched reluctance machine having at least one pole-matched rotor and stator pair;

a single phase inverter coupled to the turbo generator and further coupled to a direct current link, the single phase inverter configured to control speed of the turbo generator by driving the at least one stator and rotor pole pair;

an inverter coupled to the direct current link; and

a motor generator coupled to the inverter.

2. The system of claim 1, wherein the switched reluctance machine includes a plurality of stator and rotor pole pair assemblies further having a plurality of stator poles cooperating in pairs and equally disposed along the way of movement of a plurality of rotor poles.

3. The system of claim 2, wherein the plurality of stator and rotor pole pair assemblies are configured in parallel or series and are driven by the single phase inverter.

4. The system of claim 1, wherein the single phase inverter includes one or more insulated-gate bipolar transistors arranged in a switch mode configuration.

5. The system of claim 4, wherein excitation current is carried through the insulated-gate bipolar transistors of the single phase inverter.

6. The system of claim 1, wherein the single phase inverter includes a plurality of diodes.

7. The system of claim 6, wherein the plurality of diodes are anti-parallel diodes.

8. The system of claim 6, wherein generated power is conducted through the plurality of diodes to the DC link.

9. The system of claim 1, wherein the DC link is configured to maintain a constant voltage for the motor generator.

10. The system of claim 1, wherein the single phase inverter is controls acceleration of turbo generator speed.

11. The system of claim 1, wherein the single phase inverter maintains turbo generator speed.

12. The system of claim 1, wherein the single phase inverter controls variation in the amount of power drawn from the turbo generator.

13. The system of claim 1, wherein the single phase inverter includes a control for controlling turbo generator speed variation and maintenance, and delivering DC power.

14. A method comprising:

providing a turbo generator having a switched reluctance machine having at least one pole-matched rotor and stator pair;

providing a single phase inverter coupled to the turbo generator and further coupled to a direct current link, the single phase inverter configured to control speed of the turbo generator by driving the at least one stator and rotor pole pair;

providing an inverter coupled to the direct current link; and

providing a motor generator coupled to the inverter.

15. The method of claim 14, wherein the providing a turbo generator having a switched reluctance machine having at least one pole-matched rotor and stator pair comprises:

utilizing a rotor and stator pole match and windings configured to use a single phase control.

16. The method of claim 14, wherein the providing a turbo generator having a switched reluctance machine having at least one pole-matched rotor and stator pair comprises:

providing a switched reluctance machine having a plurality of stator and rotor pole pair assemblies further having a plurality of stator poles cooperating in pairs and equally disposed along the way of movement of a plurality of rotor poles.

17. The method of claim 16, wherein the providing a switched reluctance machine having a plurality of stator and rotor pole pair assemblies further having a plurality of stator poles cooperating in pairs and equally disposed along the way of movement of a plurality of rotor poles comprises:

providing a switched reluctance machine having a plurality of stator and rotor pole pair assemblies configured in parallel or series and driven by the single phase inverter.

18. The method of claim 14, wherein the providing a single phase inverter coupled to the turbo generator and further coupled to a direct current link comprises:

utilizing a single phase inverter having one or more insulated-gate bipolar

transistors arranged in a switch mode configuration to transfer an excitation current to the turbo generator.

19. The method of claim 14, wherein the providing a single phase inverter coupled to the turbo generator and further coupled to a direct current link comprises:

utilizing the single phase inverter to control acceleration of turbo generator

speed and maintain turbo generator speed.

20. The method of claim 14, wherein the providing a single phase inverter coupled to the turbo generator and further coupled to a direct current link comprises:

utilizing the single phase inverter to maintain voltage regulation independently

while controlling the speed of the turbo generator.

21. The method of claim 14, wherein the providing a single phase inverter coupled to the turbo generator and further coupled to a direct current link comprises:

utilizing the single phase inverter control variation in the amount of power drawn

from the turbo generator.

22. The method of claim 14, a single phase inverter coupled to the turbo generator and further coupled to a direct current link

utilizing a single phase inverter having a plurality of diodes through which generated power is conducted to the DC link.

23. The method of claim 14, wherein the providing an inverter coupled to the direct current link comprises:

utilizing the inverter to maintain a constant voltage for the motor generator.

24. A turbo compounding system comprising:

at least one turbine;

an engine;

a charge air cooler positioned between the at least one turbine and the engine;

a diesel particulate filter;

a turbo generator having a switched reluctance machine having at least one pole-matched rotor and stator pair;

a single phase inverter coupled to the turbo generator and further coupled to a direct current link, the single phase inverter configured to control speed of the turbo generator by driving the at least one stator and rotor pole pair;

an inverter coupled to the direct current link;

a motor generator coupled to the inverter; and

a bus.