Energy storage device for a separately excited electrical machine

• US 9,088,240 B2
• Filed: 12/07/2011
• Issued: 07/21/2015
• Est. Priority Date: 02/08/2011
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Feuerstack, Peter, Weissenborn, Erik, Kessler, Martin
• Primary Examiner(s): Glass, Erick
• Application Number:
  US13/984,085
• Publication Number:
  US 20130314008A1
• Time in Patent Office: 1,322 Days
• Field of Search: 318/139
• US Class Current: 1/1
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0024 Parallel/serial switching of connection of batteries to charge or load circuit
• CPC Class Codes: H02J 7/0025 Sequential battery discharge in systems with a plurality of batteries
• CPC Class Codes: H02J 7/1492 by means of controlling devices between the generator output and the battery
• CPC Class Codes: H02P 25/024 controlled by supply frequency
• CPC Class Codes: H02P 7/298 controlling armature and field supply
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

The invention relates to an energy storage device (2) comprising at least one first energy supply branch (2a, 2b, 2c) which is designed to supply a separately excited electrical machine (1) with energy via a first connection (3a, 3b, 3c), and a second energy supply branch (2d) which is connected in parallel to the at least one first energy supply branch (2a, 2b, 2c) and which is designed to supply a field winding (11) of the separately excited electrical machine (1) with current via a second connection (3d), the at least one first energy supply branch (2a, 2b, 2c) and the second energy supply branch (2d) being connected to the field winding (11) by means of third connections (4a, 4b, 4c; 4d) via a common reference bus (9).

Claims

1. An energy storage device comprising:

at least a first energy supply branch that is embodied for the purpose of supplying a separately excited electrical machine with energy by way of a first connection; and

a second energy supply branch that is connected in parallel to the at least one first energy supply branch and that is embodied for the purpose of supplying an exciter winding of the separately excited electrical machine with current by way of a second connection,

wherein the at least one first energy supply branch and the second energy supply branch are connected by way of in each case a third connection to the exciter winding.

2. The energy storage device as claimed in claim 1, wherein the at least one first energy supply branch and the second energy supply branch comprise in each case at least two series-connected energy storage modules that comprise in each case at least one electrical energy storage cell having an allocated controllable coupling unit.

3. The energy storage device as claimed in claim 2, wherein the coupling units of the energy storage modules of the at least one first energy supply branch comprise switch elements in a full-bridge arrangement.

4. The energy storage device as claimed in claim 3, wherein the coupling units of the energy storage modules of the second energy supply branch comprise switch elements in a half-bridge arrangement, and wherein the energy storage device is embodied for the purpose of supplying an n-phase synchronous AC machine with energy.

5. The energy storage device as claimed in claim 2, wherein the coupling units of the energy storage modules of the at least one first energy supply branch comprise switch elements in a half-bridge arrangement.

6. The energy storage device as claimed in claim 5, wherein the coupling units of the energy storage modules of the second energy supply branch comprise switch elements in a full-bridge arrangement, and wherein the energy storage device is embodied for the purpose of supplying a separately excited DC machine with energy.

7. The energy storage device as claimed in claim 1, wherein the at least one first energy supply branch and the second energy supply branch are connected by way of in each case the third connection to a common reference rail.

8. A system comprising:

a separately excited electrical machine;

a controllable energy storage device having;

at least one first energy supply branch that is connected by way of a first connection to an energy supply connection of the separately excited electrical machine; and

a second energy supply branch that is connected in parallel to the at least one first energy supply branch and that is connected by way of a second connection to an exciter winding of the separately excited electrical machine,

wherein the at least one first energy supply branch and the second energy supply branch are connected by way of in each case a third connection to a common reference rail that is connected to the exciter winding of the separately excited electrical machine.

9. The system as claimed in claim 8, wherein the separately excited electrical machine is an n-phase synchronous AC machine where n>

1.

10. The system as claimed in claim 9, wherein the separately excited electrical machine is a separately excited DC machine.