Circuit arrangement for power distribution in a motor vehicle

• US 8,866,332 B2
• Filed: 06/16/2010
• Issued: 10/21/2014
• Est. Priority Date: 06/24/2009
• Status: Active Grant

• Current Assignee: Brusa Hypower AG
• Original Assignee: BRUSA Elektronik AG
• Inventors: Krause, Axel
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): WILLOUGHBY, TERRENCE RONIQUE
• Application Number:
  US13/320,899
• Publication Number:
  US 20120098331A1
• Time in Patent Office: 1,588 Days
• Field of Search: None
• US Class Current: 307/9.1
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/16 Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02J 7/1423 with multiple batteries
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• 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 1/0074 Plural converter units whose inputs are connected in series
• CPC Class Codes: H02M 3/33573 Full-bridge at primary side of an isolation transformer
• CPC Class Codes: H02M 3/33592 having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A circuit arrangement (1) for power distribution in a motor vehicle is described, which comprises a transformer (T₁, T_1a . . . T_1n) having at least three transformer windings (W₁, W_1a . . . W_1n, W₂, W_2a . . . W_2n, W₃, W_3a . . . W_3n). A first and second on-board supply inside the vehicle and a power supply which is outside the vehicle can be connected to the circuit arrangement (1), which supplies are coupled via the transformer windings (W₁, W_1a . . . W_1n, W₂, W_2a . . . W_2n, W₃, W_3a . . . W_3n) and converters (UR₁, UR₂, UR_2a . . . UR_2n, UR₃, UR_3a . . . UR_3n). The third converter (UR₃, UR_3a . . . UR_3n) can be connected via a first change-over switch (US₁, US_1′) alternatively to the first on-board supply inside the vehicle or to the power supply outside the vehicle. A plurality of first converters (UR 1) and/or a plurality of second converters (UR₂, UR_2a . . . UR_2n) and/or a plurality of third converters (UR₃, UR_3a . . . UR_3n) each being connected to the transformer windings (W₁, W_1a . . . W_1n, W₂, W_2a . . . W_2n, W₃, W_3a . . . W_3n) can be switched in series or in parallel are provided.

Claims

1. A circuit arrangement for power distribution in a motor vehicle, comprising:

a first transformer stage;

said first transformer stage having a first group of at least three magnetically coupled windings;

a second transformer stage;

said second transformer stage having a second group of at least three magnetically coupled windings;

a first onboard supply;

a first connection configured to connect to said first onboard supply;

a first converter unit coupling said first connection to a first winding of said first group of at least three magnetically coupled windings, said first converter unit also coupling said first connection to a first winding of said second group of at least three magnetically coupled windings;

a second onboard supply;

a second connection configured to connect to said second onboard supply;

a second converter unit coupling said second connection to a second winding of said first group of at least three magnetically coupled windings, said second converter unit also coupling said second connection to a second winding of said second group of at least three magnetically coupled windings;

a second-group voltage transformer connected between said second connection and said second converter unit;

a third connection configured to connect externally;

a third converter unit configured to selectively couple said third connection to a third winding of said first group of at least three magnetically coupled windings, said third converter unit also configured to selectively couple said third connection to a third winding of said second group of at least three magnetically coupled windings;

a third-group voltage transformer connected between said third connection and said third converter unit; and

,

a first change-over switch configured to controllably connect said third converter unit either to said first connection or alternatively to said third connection.

2. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 1, further comprising:

said first converter unit having a first-group first converter coupled to said first winding of said first group of at least three magnetically coupled windings;

said first converter unit having a first-group second converter coupled to said first winding of said second group of at least three magnetically coupled windings; and

,

said first-group first converter coupled in parallel to said first-group second converter.

3. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 1, further comprising:

said second converter unit having a second-group first converter coupled to said second winding of said first group of at least three magnetically coupled windings;

said second converter unit having a second-group second converter coupled to said second winding of said second group of at least three magnetically coupled windings; and

,

said second-group first converter coupled in parallel to said second-group second converter.

4. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 1, further comprising:

said third converter unit having a third-group first converter coupled to said third winding of said first group of at least three magnetically coupled windings; and

,

said third converter unit having a third-group second converter coupled to said third winding of said second group of at least three magnetically coupled windings.

5. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 4, further comprising:

a switch configured to controllably connect said third-group first converter either in parallel or alternatively in series with said third-group second converter.

6. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 1, further comprising:

a second change-over switch configured to controllably bypass said second-group voltage transformer.

7. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 1, further comprising:

a nonlinear choke in said second-group voltage transformer.

8. The circuit arrangement for power distribution in a motor vehicle as claimed in claim 1, wherein:

said first change-over switch is a three-pole switching relay.

9. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 1, further comprising:

a plurality of starting/cut-out relays in said first change-over switch; and

,

two further starting/cut-out relays configured to controllably connect said third connection to a two-pole AC voltage supply.

10. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 1, further comprising:

a control configured to effect voltage adaptation between said first connection and said second connection when said first change-over switch connects said third converter unit to said first connection, and to effect voltage adaptation between said third connection and said second connection when said first change-over switch alternatively connects said third converter unit to said third connection;

said control being connected to control said third-group voltage converter.

11. A circuit arrangement for power distribution in a motor vehicle, comprising:

a transformer having at least three magnetically coupled transformer windings;

a first connection for a first on-board-vehicle supply, said first supply being in electrical communication with a first converter, said first supply being coupled to a first one of said at least three transformer windings via said first converter;

a second connection for a second on-board-vehicle supply, said second supply being in electrical communication with a second converter, said second supply being coupled to a second one of said at least three transformer windings via said second converter;

a third connection for an external power supply, said third connection having a controllable electrical communication with a third converter, said third converter being coupled to to a third one of said at least three transformer windings;

a first change-over switch configured to controllably alternatively connect said third converter to one of, a) said first connection, or b) said third connection;

said transformer being one stage of a plurality having integral number n of transformer stages, each respective one of said n transformer stages having a respective group of at least three magnetically coupled windings respectively;

said first converter being part of a respective first converter unit having a plurality of integral number n of respective first converters, said first converter unit respectively coupling said first connection to said respective first windings of each one of said respective groups of at least three magnetically coupled windings of said n transformer stages respectively;

said second converter being part of a respective second converter unit having a plurality of integral number n of respective second converters, said second converter unit respectively coupling said second connection to said respective second windings of each one of said respective groups of at least three magnetically coupled windings of said n transformer stages respectively;

a second-group voltage transformer being electrically connected between said second connection and said second converter unit;

said third converter being part of a respective third converter unit having a plurality of integral number n of respective third converters each configured to selectively couple said third connection to the respective third windings of each one of said respective groups of at least three magnetically coupled windings of said n transformer stages respectively, and,

a third-group voltage transformer being electrically connected between said third connection and said third converter unit; and

,

said first change-over switch is configured to controllably alternatively connect said third converter unit either, a) to said first connection or, b) to said third connection.

12. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 11, further comprising:

said first converter unit having a first-group first converter coupled to a first winding of a first group of said at least three magnetically coupled windings of a first of said plurality n of transformer stages;

said first converter unit having a first-group second converter coupled to said first winding of a second group of at least three magnetically coupled windings of a second of said plurality n of transformer stages; and

,

said first-group first converter is coupled in parallel to said first-group second converter.

13. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 11, further comprising:

said second converter unit having a second-group first converter coupled to a second winding of a first group of at least three magnetically coupled windings of a first of said plurality n of transformer stages;

said second converter unit having a second-group second converter coupled to a second winding of a second group of at least three magnetically coupled windings of a second of said plurality n of transformer stages; and

,

said second-group first converter is coupled in parallel to said second-group second converter.

14. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 11, further comprising:

said third converter unit having a third-group first converter coupled to a third winding of a first group of at least three magnetically coupled windings of a first of said plurality n of transformer stages; and

,

said third converter unit having a third-group second converter coupled to a third winding of a second group of at least three magnetically coupled windings of a second of said plurality n of transformer stages.

15. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 14, further comprising:

a switch configured to controllably connect said third-group first converter either in parallel or alternatively in series with said third-group second converter.

16. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 11, further comprising:

a second change-over switch configured to controllably bypass said second-group voltage transformer.

17. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 11, further comprising:

a nonlinear choke in said second-group voltage transformer.

18. The circuit arrangement for power distribution in a motor vehicle as claimed in claim 11, wherein:

said first change-over switch is a three-pole switching relay.

19. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 11, further comprising:

a plurality of starting/cut-out relays in said first change-over switch; and

two further starting/cut-out relays configured to controllably connect said third connection to a two-pole AC voltage supply.

20. A circuit arrangement for power distribution in a motor vehicle as claimed in claim 11, further comprising:

a control configured to effect voltage adaptation between said first connection and said second connection when said first change-over switch connects said third converter unit to said first connection, and to effect voltage adaptation between said third connection and said second connection when said first change-over switch alternatively connects said third converter unit to said third connection;

said control being operatively connected to control said third-group voltage transformer.