# US 10,479,294 B2 · Circuit arrangement

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- Number: US 10,479,294 B2
- Document ID: US10479294B2
- Status: Granted
- Kind: B2
- Application number: 15/423,000
- Filed: 2017-02-02
- Published: 2017-08-03
- Granted: 2019-11-19
- Earliest claimed: 2016-02-03
- Assignees: Audi AG
- Applicants: Audi AG
- Inventors: Thomas Rinkleff; David Krause
- Web page: https://patentgrep.com/patent/US10479294B2

## CPC

- B60R 16/023: for transmission of signals between vehicle parts or subsystems
- B60L 1/00: Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00)
- B60R 16/00: Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for {(devices for protecting vehicle occupants in case of accidents B60R21/00; safety belts B60R22/00; central door locking E05B49/00, E05B77/50)}
- H02M 1/123: {Suppression of common mode voltage or current}
- H02M 1/126: {using passive filters}
- H03H 7/427: {Common-mode filters (H02J3/01 and H02M1/126 takes precedence)}
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- 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
- 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)
- H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P)

## Abstract

A circuit arrangement for an onboard network of a motor vehicle, includes a line having a first inductivity and connecting a component of a power electronics of an onboard network with an element, wherein the component is adapted for being clocked during operation of the power electronics at a clock frequency; and an absorber circuit assigned to the line and having a second inductivity and a capacitance, wherein the second inductivity of the absorber circuit is coupled with the first inductivity of the line.

## Claims

### Claim 1

A circuit arrangement for an onboard network of a motor vehicle, said circuit arrangement comprising:
power electronics comprising a component which is clocked during operation of the power electronics at a clock frequency, the power electronics being connected, on the one hand, via a first line to a first element and, on the other hand, via a second line to a second element of the onboard network, with at least one of the first lines and the second lines having a first inductor configured as part of a ferrite core and surrounding the at least one line; and
an absorber circuit comprising a second inductor, a resistor and a first capacitor connected in series, said second inductor of the absorber circuit being inductively coupled with the first inductor.

### Claim 2 (depends on 1)

The circuit arrangement of claim 1, wherein the first line comprises two conductor wires connecting the component with the first element, with the first inductor being common to the two conductor wires, said second inductor of the absorber circuit being inductively coupled with the common first inductor.

### Claim 3 (depends on 1)

The circuit arrangement of claim 1, wherein the first line comprises two conductor wires connecting the component with the first element, with at least one of the two conductor wires having an individual first inductor, said second inductor of the absorber circuit being inductively coupled with the individual first inductor.

### Claim 4 (depends on 2)

The circuit arrangement of claim 2, wherein a first one of the two conductor wires extends straight and a second one of the two conductor wires includes a loop, which is wound in opposite direction relative to the first conductor wire, wherein the first conductor wire and the loop of the second conductor wire form the common first inductor, said second inductor of the absorber circuit being inductively coupled with the common first inductor.

### Claim 5 (depends on 1)

The circuit arrangement of claim 1, wherein the first inductor of the line is configured as a choke.

### Claim 6 (depends on 1)

The circuit arrangement of claim 1, wherein the first inductor comprises at least one core, which surrounds at least one of the first and second lines.

### Claim 7 (depends on 1)

The circuit arrangement of claim 1, further comprising a second capacitor connected in parallel to the first inductor.

### Claim 8 (depends on 1)

The circuit arrangement of claim 1, wherein selecting the second inductor and the first capacitor of the absorber circuit are selected so as to adjust a resonance frequency of the absorber circuit to an n-fold value of said clock frequency, with n being an integer number greater than or equal to 1.

### Claim 9 (depends on 1)

The circuit arrangement of claim 1, wherein a bandwidth of the absorber circuit is adjustable via a resistance value of the resistor.

### Claim 10

An onboard network for a motor vehicle, said onboard network comprising:
power electronics including a component adapted for being clocked during operation of the power electronics at a clock frequency;
a first element connected to the power electronics via a first line;
a second element connected to the power electronics via a second element, with at least one of the first lines and the second lines having a first inductor configured as part of a ferrite core and surrounding the at least one line; and
an absorber circuit comprising a second inductor, a resistor and a capacitor connected in series, said second inductor of the absorber circuit being inductively coupled with the first inductor.

### Claim 11 (depends on 10)

The onboard network of claim 10, wherein the first element is configured as an energy storage device.

### Claim 12 (depends on 10)

The onboard network of claim 10, wherein the second element is configured as an electric machine.

### Claim 13 (depends on 10)

The onboard network of claim 10, wherein the ferrite core is made of a material which has a magnetic permeability of greater than 1.

### Claim 14 (depends on 1)

The circuit arrangement of claim 1, wherein the component is a pulse inverter.

### Claim 15 (depends on 1)

The circuit arrangement of claim 1, wherein the first element is an energy storage device.

### Claim 16 (depends on 1)

The circuit arrangement of claim 1, wherein the second element is an electrical machine.

### Claim 17 (depends on 10)

The onboard network of claim 10, wherein the component is a pulse inverter.

### Claim 18 (depends on 1)

The circuit arrangement of claim 1, wherein the second line comprises three conductor wires connecting the component with the second element, with the first inductor being common to the three conductor wires, said second Inductor of the absorber circuit being inductively coupled with the common first inductor.

### Claim 19 (depends on 1)

The circuit arrangement of claim 1, wherein the second line comprises three conductor wires connecting the component with the second element, with at least one of the three conductor wires having an individual first inductor, said second inductor of the absorber circuit being inductively coupled with the individual first inductor.