Electrical power system for multi-use power conditioning and engine start

• US 7,112,944 B1
• Filed: 04/19/2005
• Issued: 09/26/2006
• Est. Priority Date: 04/19/2005
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Kojori, Hassan A.
• Primary Examiner(s): BERHANE, ADOLF D
• Application Number:
  US11/108,770
• Publication Number:
  US 20060232249A1
• Time in Patent Office: 525 Days
• Field of Search: 363/15, 363/37, 290/31, 290/38.R, 290/40.B, 290/40.F, 290/46, 290/47, 322/10, 322/22, 322/29, 322/45, 307/46, 307/82
• US Class Current: 322/29
• CPC Class Codes: F02N 11/04 the motors being associated with current generators
• CPC Class Codes: H02M 5/4505 having a rectifier with controlled elements
• CPC Class Codes: H02P 2101/30 for aircraft
• CPC Class Codes: H02P 25/034 Voice coil motors voice coil motors driven by DC power H02P7/025
• CPC Class Codes: H02P 9/04 Control effected upon non-electric prime mover and dependent upon electric output value of the generator

Abstract

A synchronous and bi-directional power conversion module (140) for use in a variable frequency power conversion system (100) comprises a first input/output side (142) for AC power input/output and DC power source input; a second input/output side (144) for DC link connection; and an active power switching arrangement (Q1–Q6), which is controlled by a gating pattern to perform multi-mode power conversion. The active power switching arrangement (Q1–Q6) is controlled to convert DC link voltage from the DC link connection (144) to an AC load supply voltage during a forward power mode; convert AC input power from the first input/output side (142) to a regulated DC link voltage during an AC source input, reverse power mode; and convert DC input power from the first input/output to a regulated DC link voltage during a DC source input, reverse power mode.

Claims

1. A synchronous and bi-directional power conversion module for use in a variable frequency power conversion system, the power conversion module comprising:

a first input/output side for AC power input/output and DC power source input;

a second input/output side for DC link connection; and

an active power switching arrangement, which is controlled by a gating pattern to perform multi-mode power conversion, wherein said active power switching arrangement is controlled to;

convert DC link voltage from said DC link connection to an AC load supply voltage during a forward power mode;

convert AC input power from said first input/output side to a regulated DC link voltage during an AC source input, reverse power mode; and

convert DC input power from said first input/output side input to a regulated DC link voltage during a DC source input, reverse power mode.

2. The power conversion module according to claim 1, wherein

said active power switching arrangement converts DC link voltage to a lower DC voltage during a battery charging mode.

3. The power conversion module according to claim 2, wherein said active power switching arrangement functions as a step-down buck converter in said battery charging mode.

4. The power conversion module according to claim 1, wherein said active power switching arrangement functions as a step-up boost converter during said DC source input, reverse power mode.

5. The power conversion module according to claim 1, wherein said DC power source input is connected to an on-board aircraft battery.

6. The power conversion module according to claim 1, wherein said first input/output side is connected to a ground-based DC power supply during DC source input, reverse power mode and a ground-based AC power supply during AC source input, reverse power mode.

7. A multi-mode power conversion system in which a synchronous machine operates as a generator during a forward power mode and a starter during a reverse power mode, said system comprising:

a first multi-mode power conversion module, having an AC input/output connected to the synchronous machine, a DC input/output connected to a DC link, and an active power switching arrangement for converting multi-phase AC power from the synchronous machine to regulated DC link voltage during the forward power mode and converting DC link voltage to multi-phase AC power for supply to the synchronous machine during the reverse power mode; and

a second multi-mode power conversion module, having a first input/output side for AC power input/output, a second input/output side for DC link connection, and an active power switching arrangement, wherein said active power switching arrangement is controlled to convert DC link voltage from said DC link connection to an AC load supply voltage during the forward power mode and convert AC input power from said first input/output side to a regulated DC link voltage during a reverse power mode,

wherein said multi-mode power conversion system includes an electrical contactor between said first multi-mode power conversion module and the synchronous machine that is closed during both said forward power mode and said reverse power mode and does not include a electrical connection or electrical contactor between the first input/output side of said second multi-mode power conversion module and the synchronous machine.

8. The multi-mode power conversion system according to claim 7, wherein said first input/output side of said second multi-mode power conversion module is connected to a ground-based AC power supply during the reverse power mode.

9. The multi-mode power conversion system according to claim 7, wherein said synchronous machine generates multi-phase AC power during the forward power mode at a frequency between 320 Hz and 800 Hz.

10. The multi-mode power conversion system according to claim 7, further comprising:

a controller for controlling said first and second multi-mode power conversion modules.

11. A multi-mode power conversion system in which a synchronous machine operates as a generator during a forward power mode and a starter during a reverse power mode, said system comprising:

a first multi-mode power conversion module, having an AC input/output connected to the synchronous machine, a DC input/output connected to a DC link, and an active power switching arrangement for converting multi-phase AC power from the synchronous machine to regulated DC link voltage during the forward power mode and converting DC link voltage to multi-phase AC power for supply to the synchronous machine during the reverse power mode; and

a second multi-mode power conversion module, having a first input/output side for AC power input/output and for DC power source input, a second input/output side for DC link connection, and an active power switching arrangement, wherein said active power switching arrangement is controlled to;

convert DC link voltage from said DC link connection to an AC load supply voltage during the forward power mode;

convert AC input power from said first input/output side to a regulated DC link voltage during an AC source input, reverse power mode; and

convert DC input power from said first input/output side to a regulated DC link voltage during a DC source input, reverse power mode.

12. The multi-mode power conversion system according to claim 11, further comprising:

a controller for controlling said first and second multi-mode power conversion modules.

13. The multi-mode power conversion system according to claim 11, further comprising:

an exciter power supply inverter having an AC side connected to the synchronous machine and a DC side connected to a DC link, said exciter power supply inverter converting DC link voltage to an AC exciter power supply voltage.

14. The multi-mode power conversion system according to claim 13, wherein said exciter power supply inverter and said first and second multi-mode power conversion modules are integrated on the same heat sink for thermal management.

15. The multi-mode power conversion system according to claim 11, wherein

said active power switching arrangement of said second multi-mode power conversion module converts DC link voltage to a lower DC voltage during a battery charging mode.

16. The multi-mode power conversion system according to claim 15, wherein said active power switching arrangement of said second multi-mode power conversion module functions as a step-down buck converter in said battery charging mode.

17. The multi-mode power conversion system according to claim 11, wherein said active power switching arrangement of said second multi-mode power conversion module functions as a step-up boost converter during said DC source input, reverse power mode.

18. The multi-mode power conversion system according to claim 11, wherein said DC power source input of said second multi-mode power conversion module is connected to an on-board aircraft battery.

19. The multi-mode power conversion system according to claim 11, wherein said first input/output side of said second multi-mode power conversion module is connected to a ground-based DC power supply during the DC source input, reverse power mode and a ground-based AC power supply during the AC source input, reverse power mode.

20. The multi-mode power conversion system according to claim 11, wherein said synchronous machine generates multi-phase AC power during the forward power mode at a frequency between 320 Hz and 800 Hz.