# US 2017/0288575 A1 · Power converter

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- Number: US 2017/0288575 A1
- Document ID: US20170288575A1
- Status: Published application
- Kind: A1
- Application number: 15/467,565
- Filed: 2017-03-23
- Published: 2017-10-05
- Earliest claimed: 2016-04-01
- Assignees: Murata Manufacturing Co., Ltd.
- Applicants: Murata Manufacturing Co., Ltd.
- Inventors: Hiroshi KITADA
- Web page: https://patentgrep.com/patent/US20170288575A1

## CPC

- H02M 7/5387: in a bridge configuration
- H02M 1/12: Arrangements for reducing harmonics from AC input or output
- H02M 1/126: {using passive filters}
- H02M 7/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections}
- 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)

## Abstract

A power converter includes: a plurality of external terminals; a grounded earth terminal; a power conversion circuit; a ground conductor; and a plurality of inductors. A plurality of nodes of the power conversion circuit are connected to the respective plurality of external terminals. The power conversion circuit performs power conversion by switching received power. A plurality of inductors are inserted between the plurality of external terminals and the plurality of nodes. Further, another inductor is inserted between the ground conductor and the earth terminal. In this way, there can be provided a power converter that provides a sufficient noise reduction effect also in a high frequency region.

## Claims

### Claim 1

A power converter comprising:
a plurality of external terminals;
an earth terminal connected to a ground;
a power conversion circuit including a plurality of nodes, each of the plurality of nodes being connected to a corresponding one of the plurality of external terminals, the power conversion circuit being configured to perform power conversion by switching received power;
a ground conductor;
a plurality of inductors, each of the plurality of inductors being inserted between a corresponding one of the plurality of external terminals and a corresponding one of the plurality of nodes; and
another inductor inserted between the ground conductor and the earth terminal.

### Claim 2 (depends on 1)

The power converter according to claim 1, further comprising a plurality of capacitors each including a first electrode and a second electrode, the first electrode being connected to a corresponding one of the plurality of nodes, the second electrode being connected to the ground conductor.

### Claim 3 (depends on 1)

The power converter according to claim 1, wherein the plurality of inductors each inserted between the corresponding one of the plurality of external terminals and the corresponding one of the plurality of nodes are inductively coupled with the other inductor inserted between the ground conductor and the earth terminal to construct a common mode choke coil having not less than three phases.

### Claim 4 (depends on 1)

The power converter according to claim 1, wherein
the plurality of external terminals are connected to a DC power supply, and
the power conversion circuit is configured to:
receive DC power from the plurality of nodes;
convert the DC power into AC power; and
output the AC power.

### Claim 5 (depends on 1)

The power converter according to claim 1, wherein
the plurality of external terminals are connected to a power system, and
the power conversion circuit is configured to:
receive DC power;
convert the DC power into AC power; and
output the converted AC power from the plurality of nodes to the power system.