CONVERTER CIRCUIT AND METHOD FOR TRANSFERRING ELECTRICAL ENERGY

• US 20140225432A1
• Filed: 06/20/2012
• Published: 08/14/2014
• Est. Priority Date: 08/29/2011
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Geyer, Hans
• Application Number:
  US14/241,124
• Publication Number:
  US 20140225432A1
• Time in Patent Office: Days
• US Class Current: 307/10.1
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/46 with more than three phases
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 50/14 using DC generators and AC motors
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 3/1842 wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02M 1/10 Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
• CPC Class Codes: H02M 3/33584 Bidirectional converters
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• 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 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles

Abstract

The invention relates to a converter circuit (50) for transferring electrical energy, in particular for application in a motor vehicle wiring system (38, 42), which converter circuit comprises an electromagnetic transfer unit (60) having three electromagnetic transfer members (62, 64, 66) that can be electromagnetically coupled to each other in order to transfer electromagnetic energy, wherein the first electromagnetic transfer member (62) is connected to a first bi-directional converter circuit that comprises a first voltage connection pole pair (80) for connecting an AC voltage source and/or sink (54), wherein the second electromagnetic transfer member (64) is connected to a rectifier converter circuit that is connected on the outlet side to an electrical energy store (88), and wherein the third electromagnetic transfer member (66) is connected to a second bi-directional converter circuit that comprises a second voltage pole pair (96) for connecting a DC voltage source and/or sink (98), and a control unit (100) that is connected to the first bi-directional converter circuit, the second bi-directional converter circuit and the rectifier converter circuit, in order to control the exchange of electrical energy between the AC voltage source and/or sink (54), the DC voltage source and/or sink (98) and/or the electrical energy store (88).

Claims

1. A converter circuit for transferring electrical energy, in particular for application in a motor vehicle wiring system, which converter circuit comprises an electromagnetic transfer unit having at least three electromagnetic transfer members that can be electromagnetically coupled to each other in order to transfer electromagnetic energy, wherein the first electromagnetic transfer member is connected to a first bi-directional converter circuit that comprises a first voltage connection pole pair for connecting an AC voltage source and/or sink, wherein the second electromagnetic transfer member is connected to a rectifier converter circuit that is connected on the outlet side to an electrical energy store, and wherein the third electromagnetic transfer member is connected to a second bi-directional converter circuit that comprises a second voltage pole pair for connecting a DC voltage source and/or sink, and a control unit that is connected to the first bi-directional converter circuit, the second bi-directional converter circuit and the rectifier converter circuit, in order to control the exchange of electrical energy between the AC voltage source and/or sink, the DC voltage source and/or sink and/or the electrical energy store.

2. The converter circuit according to claim 1, wherein the first bi-directional converter circuit comprises an electronic H-bridge circuit or a four-quadrant converter, an inverter and a rectifier, wherein the system can be switched between the inverter and the rectifier depending on the power flow direction.

3. The converter circuit according to claim 2, wherein the rectifier is connected to a reactive power compensation circuit.

4. The converter circuit according to claim 1, wherein the second bi-directional converter circuit comprises an electronic H-bridge circuit or a four-quadrant converter and a DC voltage converter.

5. The converter circuit according to claim 1, wherein the electromagnetic transfer unit is designed as a transformer and the electromagnetic transfer members are designed as coils.

6. The converter circuit according to claim 1, wherein the converter circuit is designed to transfer electrical power from the AC voltage source and/or sink or from the DC voltage source and/or sink to the two respective other components connected to the electromagnetic transfer unit or to one of the two other components.

7. The converter circuit according to claim 1, wherein the second voltage pole pair is connected to a high-voltage battery and wherein the electrical energy store is a low-voltage battery.

8. The converter circuit according to claim 1, wherein the second voltage pole pair is connected to a multi-phase inverter in order to provide a multi-phase AC voltage.

9. Converter circuit according to claim 1, wherein the first bi-directional converter circuit and/or the second bi-directional converter circuit are designed as resonant converters.

10. A method for transferring electrical energy by means of a converter circuit according to claim 1, wherein the electrical energy is exchanged between the AC voltage source and/or sink, the DC voltage source and/or sink and/or the electrical energy store.

11. An onboard voltage supply system of a motor vehicle comprising a converter circuit according to claim 1.

12. The onboard voltage supply system of a motor vehicle according to claim 11, wherein the control unit is connected via a motor vehicle wiring system to the converter circuits.