# US 2013/0155725 A1 · Method for current control in a direct voltage network of a direct voltage converter and a direct voltage converter

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- Number: US 2013/0155725 A1
- Document ID: US20130155725A1
- Status: Published application
- Kind: A1
- Application number: 13/714,029
- Filed: 2012-12-13
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Assignees: Robert Bosch GmbH
- Inventors: Thomas Knorpp
- Web page: https://patentgrep.com/patent/US20130155725A1

## CPC

- H02M 3/22: with intermediate conversion into AC
- B60L 50/16: with provision for separate direct mechanical propulsion
- H02J 1/04: Current-controlled supply systems, e.g. constant-current supply systems
- B60L 2210/10: DC to DC converters
- B60L 2210/40: DC to AC converters
- B60L 2240/529: Current
- G05F 1/10: Regulating voltage or current (G05F1/02 takes precedence)
- H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV]
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 10/72: Electric energy management in electromobility
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method for the control of a first current in a first direct voltage network which is connected to a direct voltage converter, wherein energy is transmitted between the first and a second direct voltage network via a transformation unit of the direct voltage converter, wherein a current control is provided for the control of a second current in the second direct voltage network. A second current setpoint is determined from a first current setpoint of the first direct voltage network based on a transfer function of the transformation unit, which second current setpoint is fed to the current control and therefore, due to the transformation ratio of the transformation unit, a first actual current of the current-control-free direct voltage network is controlled.

## Claims

### Claim 1

A method for controlling a first current in a first direct voltage network which is connected to a direct voltage converter, the method comprising:
transmitting energy between the first and a second direct voltage network by means of a transformation unit of the direct voltage converter,
providing a current control for the control of a second current in the second direct voltage network,
determining a second current setpoint from a first current setpoint of the first direct voltage network based on a transfer function of the transformation unit, which second current setpoint is fed to the current control and therefore the first current of the first direct voltage network is controlled.

### Claim 2 (depends on 1)

The method according to claim 1, wherein a second current setpoint limit of the second direct voltage network is determined from a first current setpoint limit of the first direct voltage network which is corrected by an offset current value.

### Claim 3 (depends on 3)

The method according to claim 3, wherein the offset current value is formed from a difference between the first current setpoint limit and an actual current of the first direct voltage network, wherein this difference is fed, in particular, to a further control.

### Claim 4 (depends on 4)

The method according to claim 4, wherein this difference is limited in the further control.

### Claim 5

A direct voltage converter having a transformation unit which connects a first direct voltage network to a second direct voltage network, wherein energy is transmitted between the first and the second direct voltage network via the transformation unit of the direct voltage converter and wherein a current control for the control of a second current is provided in the second direct voltage network, wherein a hardware unit is configured to determine a second current setpoint from a first current setpoint of the first direct voltage network based on a transfer function of the transformation unit, which second current setpoint is fed to the current control and a first actual current of the first direct voltage network is controlled.

### Claim 6 (depends on 8)

The direct voltage converter according to claim 8, wherein the transformation unit comprises a transformer.