Electric system architecture for a vehicle with multiple load characteristics

• US 10,601,338 B2
• Filed: 09/25/2017
• Issued: 03/24/2020
• Est. Priority Date: 09/25/2017
• 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., Moss, Steven J.
• Primary Examiner(s): Jha, Abdhesh K
• Application Number:
  US15/714,746
• Publication Number:
  US 20190097546A1
• Time in Patent Office: 911 Days
• Field of Search: None
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: H02J 3/36 Arrangements for transfer of electric power between ac networks via a high-tension dc link
• CPC Class Codes: H02M 1/007 Plural converter units in cascade push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826
• CPC Class Codes: H02M 1/008 Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
• CPC Class Codes: H02M 3/155 using semiconductor devices only
• CPC Class Codes: H02M 3/1586 switched with a phase shift, i.e. interleaved
• CPC Class Codes: H02M 5/44 using discharge tubes or semiconductor devices to convert the intermediate dc into ac
• CPC Class Codes: H02M 7/23 arranged for operation in parallel H02M7/2176 takes precedence
• CPC Class Codes: H02M 7/483 Converters with outputs that each can have more than two voltages levels

Abstract

An electric power system (EPS) may comprise a first power conversion channel and a second power conversion channel connected in parallel with a permanent magnet synchronous machine (PMSM). The first power conversion channel may be suitable for a load having a first electronic characteristic. The second power conversion channel may be suitable for a load having a second electronic characteristic. The first power conversion channel may comprise a first rectifier configured to receive an alternating current (AC) power from the PMSM and rectify the AC power into a first direct current (DC) power, a first buck converter configured to receive the first DC power from the first rectifier and reduce a voltage of the first DC power, and a first output filter configured to filter the first DC power and supply the first DC power to a first load.

Claims

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

a permanent magnet synchronous machine (PMSM);

a first rectifier configured to receive an alternating current (AC) power from the PMSM and rectify the AC power into a first direct current (DC) power;

a first buck converter configured to receive the first DC power from the first rectifier and reduce a voltage of the first DC power;

a first output filter configured to filter the first DC power and supply the first DC power to a first load;

a second rectifier coupled in parallel with the first rectifier and configured to receive the AC power and rectify the AC power into a second DC power;

an H-bridge connected in series with the second rectifier;

a galvanically isolated transformer connected in series with the H-bridge; and

a second output filter connected in series with the galvanically isolated transformer and configured to supply the second DC power to a second load.

2. The EPS of claim 1, further comprising:

a second buck convertor connected in series with the second rectifier.

3. The EPS of claim 2, wherein the first buck converter is connected in series with the first output filter and the second buck converter is connected in series with the first output filter.

4. The EPS of claim 3, further comprising a third current transducer connected between the second buck converter and the first output filter.

5. The EPS of claim 2, further comprising:

a third buck converter connected in parallel with the second buck converter; and

the second output filter connected in series with the second buck converter and configured to supply the second DC power to the second load.

6. The EPS of claim 5, further comprising a fourth current transducer connected between the second output filter and the second load.

7. The EPS of claim 5, further comprising a fourth buck converter connected in parallel with the third buck converter.

8. The EPS of claim 1, further comprising:

a third current transducer connected between the galvanically isolated transformer and the second output filter; and

a fourth current transducer connected between the second output filter and the second load.

9. The EPS of claim 1, further comprising:

a first current transducer connected between the first buck converter and the first output filter; and

a second current transducer connected between the first output filter and the first load;

wherein the first output filter comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a first resistor, a second resistor, and at least one capacitor, and

wherein the first buck converter comprises a transistor, a diode, an inductor, and a capacitor.

10. An electric power system (EPS) comprising:

a permanent magnet synchronous machine (PMSM) configured to generate an alternating current (AC) power;

a first power conversion channel connected to the PMSM and configured to receive the AC power;

a second power conversion channel connected to the PMSM and configured to receive the AC power;

wherein the first power conversion channel and the second power conversion channel are connected in parallel,

the first power conversion channel configured to generate a first DC power utilizing the AC power,

the second power conversion channel configured to generate a second DC power utilizing the AC power;

the first power conversion channel comprises a first rectifier configured to generate the first DC power utilizing the AC power, and the second power conversion channel comprises a second rectifier configured to generate the second DC power utilizing the AC power,

the first power conversion channel comprises;

a first buck converter configured to reduce a voltage of the first DC power; and

a first load configured to receive the first DC power; and

the second power conversion channel comprises;

an H-bridge connected in series with the second rectifier;

a galvanically isolated transformer connected in series with the H-bridge; and

a second load configured to receive the second DC power;

wherein the first DC power comprises a first power and the second DC power comprises a second power, the second power is greater than the first power.

11. The EPS of claim 10, wherein the first power conversion channel comprises a first buck converter configured to reduce a voltage of the first DC power, and the second power conversion channel comprises a second buck converter configured to reduce a voltage of the second DC power.

12. The EPS of claim 11, wherein the first DC power and the second DC power are received by the first load.

13. The EPS of claim 11, wherein the second power conversion channel further comprises a third buck converter coupled in parallel with the second buck converter.

14. The EPS of claim 13, wherein the second power conversion channel further comprises a fourth buck converter coupled in parallel with the second buck converter.

15. The EPS of claim 13, wherein the first power conversion channel comprises a first voltage and the second power conversion channel comprises a second voltage.

16. A method for generating electric power, comprising:

rotating a rotor of a permanent magnet synchronous machine (PMSM);

generating, via the PMSM, an AC power in response to the rotating;

generating, via a first power conversion channel, a first DC power utilizing the AC power, wherein the first DC power comprises a first power, and the first power conversion channel is connected to the PMSM and is configured to receive the AC power; and

generating, via a second power conversion channel, a second DC power utilizing the AC power, wherein the second DC power comprises a second power, and the second power conversion channel is connected to the PMSM and is configured to receive the AC power;

wherein the second power is greater than the first power,

the first power conversion channel and the second power conversion channel are connected in parallel,

the first power conversion channel comprises a first rectifier configured to generate the first DC power utilizing the AC power, and the second power conversion channel comprises a second rectifier configured to generate the second DC power utilizing the AC power,

the first power conversion channel comprises;

a first buck converter configured to reduce a voltage of the first DC power; and

a first load configured to receive the first DC power; and

the second power conversion channel comprises;

an H-bridge connected in series with the second rectifier;

a galvanically isolated transformer connected in series with the H-bridge; and

a second load configured to receive the second DC power.