VOLTAGE REGULATION OF PERMANENT MAGNET GENERATOR WITH EXTENDED SPEED RANGE

• US 20190097558A1
• Filed: 09/22/2017
• Published: 03/28/2019
• Est. Priority Date: 09/22/2017
• 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: Rozman, Gregory I., Gieras, Jacek F., Moss, Steven J., Shahamat, Mohammad
• Granted Patent: US 10,727,769 B2
• Time in Patent Office: Days
• CPC Class Codes: H02P 25/18 with arrangements for switching the windings, e.g. with mechanical switches or relays
• CPC Class Codes: H02P 9/14 by variation of field H02P9/08, H02P9/10 take precedence
• CPC Class Codes: H02P 9/305 controlling voltage H02P9/302 takes precedence
• 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

An electric power system (EPS) may comprise a permanent magnet synchronous generator (PMSG), a high speed rectifier configured to receive a first alternating current (AC) power from the PMSG, and a low speed rectifier configured to receive a second AC power from the PMSG. The low speed rectifier may be configured to receive the first AC power in response to the PMSG rotating at a first rotational speed, and the high speed rectifier may be configured to receive the second AC power in response to the PMSG rotating at a second faster rotational speed.

Claims

1. An electric power system (EPS), comprising:

a permanent magnet synchronous generator (PMSG), comprising;

a first stator winding;

a second stator winding;

a third stator winding; and

a control coil converter configured to control an output voltage of the PMSG;

a high speed, passive rectifier bridge configured to receive a first alternating current (AC) power from the PMSG; and

a low speed, passive rectifier bridge configured to receive a second AC power from the PMSG;

wherein the low speed rectifier bridge is configured to receive the first AC power in response to the PMSG rotating at a first rotational speed, and

the high speed rectifier bridge is configured to receive the second AC power in response to the PMSG rotating at a second rotational speed.

2. The EPS of claim 1, wherein the first AC power corresponds to a first number of turns of the first stator winding and the second AC power corresponds to a second number of turns of the first stator winding.

3. The EPS of claim 2, wherein the first number of turns is less than the second number of turns.

4. The EPS of claim 1, wherein the high speed rectifier bridge is configured to rectify the first AC power into a first direct current (DC) power, and the low speed rectifier bridge is configured to rectify the second AC power into a second DC power.

5. The EPS of claim 1, further comprising:

a first circuit breaker configured to at least one of activate and disable the low speed rectifier bridge; and

a second circuit breaker configured to at least one of activate and disable the high speed rectifier bridge.

6. The EPS of claim 5, wherein

the first circuit breaker activates the low speed rectifier bridge in response to the PMSG rotating at the first rotational speed,

the second circuit breaker activates the high speed rectifier bridge in response to the PMSG rotating at the second rotational speed,

the first circuit breaker disables the low speed rectifier bridge in response to the PMSG rotating at the second rotational speed, and

the second circuit breaker disables the high speed rectifier bridge in response to PMSG rotating at the first rotational speed.

7. The EPS of claim 1, further comprising a filter configured to filter at least one of the first DC power and the second DC power.

9. The EPS of claim 2, wherein the high speed rectifier bridge is connected to each of the first stator winding, the second stator winding, and the third stator winding of the PMSG at a location between the first number of turns and the second number of turns.

8. (canceled)

10-16. -16. (canceled)

17. A method for operating an electric power system (EPS), comprising:

activating a low speed, passive rectifier bridge in response to a permanent magnet synchronous generator (PMSG) rotating at a first speed;

activating a high speed, passive rectifier bridge in response to the PMSG rotating at a second speed; and

controlling, by a control coil converter, an output voltage of the PMSG,

wherein the low speed, passive rectifier bridge receives a first AC power corresponding to a second number of turns of a stator winding of the PMSG; and

wherein the high speed, passive rectifier bridge receives a second AC power corresponding to a first number of turns of the stator winding of the PMSG.

18. The method of claim 17, further comprising rotating the PMSG.

19. The method of claim 18, further comprising:

generating the first AC power in response to the PMSG rotating at the first speed;

generating the second AC power in response to the PMSG rotating at the second speed;

generating a first DC power utilizing the first AC power, wherein the first DC power is generated by the low speed, passive rectifier bridge; and

generating a second DC power utilizing the second AC power.

20. The method of claim 17, further comprising powering an electronic device with at least one of the first DC power or the second DC power in response to the PMSG rotating at either of the first speed and the second speed.