MULTI OUTPUT VOLTAGE REGULATION OF A SYNCHRONOUS GENERATOR IN A POWER SYSTEM

• US 20090296439A1
• Filed: 05/29/2008
• Published: 12/03/2009
• Est. Priority Date: 05/29/2008
• Status: Active Grant

• Current Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Shah, Mahesh J., Qi, Weiwei
• Granted Patent: US 8,014,179 B2
• Time in Patent Office: Days
• US Class Current: 363/126
• CPC Class Codes: H02M 3/3378 in a push-pull configuration of the parallel type H02M3/3374 takes precedence
• CPC Class Codes: H02M 7/2176 comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output
• CPC Class Codes: H02P 2101/30 for aircraft
• CPC Class Codes: H02P 9/14 by variation of field H02P9/08, H02P9/10 take precedence
• CPC Class Codes: H02P 9/307 more than one voltage output
• CPC Class Codes: H02P 9/48 Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle H02P9/04 - H02P9/46 take precedence

Abstract

In typical commercial/aerospace applications, synchronous generators provide power to both the high voltage and the low voltage loads. This disclosure describes a method of regulating the output voltage for all of the loads.

Claims

1. A voltage regulator for a generator comprising:

a high voltage line to supply three-phase AC power to a high voltage use, and a feedback link from said high voltage line to provide feedback to a control for the generator to achieve a desired voltage on said high voltage line;

the high voltage line supplying a high voltage to be stepped down to a low voltage;

a low voltage line receiving the low voltage for connection to a low voltage use; and

a feedback line for providing feedback from said low voltage line to a low voltage control for controlling the level of voltage supplied on said low voltage line.

2. The voltage regulator as set forth in claim 1, wherein said high voltage supplied to be stepped down passes through a transformer.

3. The voltage regulator as set forth in claim 2, wherein said transformer is positioned upstream of a rectifier.

4. The voltage regulator as set forth in claim 2, wherein the feedback line for said low voltage line supplies a sensed low voltage to a low voltage control and a desired low voltage is also supplied to said low voltage control.

5. The voltage regulator as set forth in claim 3, wherein said low voltage control controls an inverter to ensure a desired low voltage on said low voltage line.

6. The voltage regulator as set forth in claim 5, wherein an input voltage upstream of said inverter is also supplied to said low voltage control to allow said low voltage control to control said inverter and achieve said desired low voltage.

7. The voltage regulator as set forth in claim 5, wherein said inverter includes at least four switches which are controlled to provide desired wave forms to be input into said transformer.

8. A generator, voltage regulator, and use comprising:

a synchronous generator supplying three phase AC power to a high voltage line;

a high voltage line to supply the three-phase AC power to a high voltage use, and a feedback link from said high voltage line to provide feedback to a control for the generator to achieve a desired voltage on said high voltage line;

the high voltage line supplying a high voltage to be stepped down to a low voltage, a low voltage line receiving the low voltage for connection to a low voltage use; and

a feedback line for providing feedback from said low voltage line to a low voltage control for controlling the level of voltage supplied on said low voltage line.

9. The generator, voltage regulator, and use as set forth in claim 8, wherein said high voltage supplied to be stepped down passes through a transformer.

10. The generator, voltage regulator, and use as set forth in claim 9, wherein said transformer is positioned upstream of a rectifier.

11. The generator, voltage regulator, and use as set forth in claim 9, wherein the feedback line for said low voltage line supplies a sensed low voltage to a control and a desired low voltage is also supplied to said low voltage control.

12. The generator, voltage regulator, and use as set forth in claim 10, wherein said low voltage control controls an inverter to ensure a desired low voltage on said low voltage line.

13. The generator, voltage regulator, and use as set forth in claim 12, wherein an input voltage upstream of said inverter is also supplied to said low voltage control to allow said low voltage control to control said inverter and achieve said desired low voltage.

14. The generator, voltage regulator, and use as set forth in claim 12, wherein said inverter includes at least four switches which are controlled to provide desired wave forms to be input into said transformer.

15. The generator, voltage regulator, and use as set forth in claim 8, wherein said high voltage use is an electric motor and said low voltage use is a control voltage.