# US 12,184,189 B2 · Power conversion device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,184,189 B2
- Document ID: US12184189B2
- Status: Granted
- Kind: B2
- Application number: 17/911,914
- Filed: 2021-01-15
- Published: 2023-05-04
- Granted: 2024-12-31
- Earliest claimed: 2020-03-30
- Assignees: Hitachi Astemo, Ltd.
- Applicants: Hitachi Astemo, Ltd.
- Inventors: Takashi Hirao; Takeshi Tokuyama; Noriyuki Maekawa
- Web page: https://patentgrep.com/patent/US12184189B2

## CPC

- H02M 7/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections}
- H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M 1/143: {using compensating arrangements (for reducing noise from the supply in transmission systems H04B15/005)}
- H02M 1/327: {against abnormal temperatures}
- H05K 7/20927: {Liquid coolant without phase change}
- 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)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A power conversion device can be miniaturized. A power conversion device includes a power module that performs switching operation, a smoothing capacitor that smooths a voltage ripple caused by the switching operation, a circuit board that controls driving of the power module, a housing that accommodates the power module and the smoothing capacitor, a first fixing member for fixing the power module to the housing, and a second fixing member for fixing the smoothing capacitor to the housing. The circuit board straddles between the power module and the smoothing capacitor, and is fixed by the first fixing member and the second fixing member.

## Claims

### Claim 1

A power conversion device comprising:
a power module that performs switching operation;
a smoothing capacitor that smooths a voltage ripple caused by the switching operation;
a circuit board that controls driving of the power module;
a housing that accommodates the power module and the smoothing capacitor;
a first fixing member for fixing the power module to the housing; and
a second fixing member for fixing the smoothing capacitor to the housing, wherein
the circuit board straddles between the power module and the smoothing capacitor, and is fixed by the first fixing member and the second fixing member, and
at least one of the first fixing member and the second fixing member is made of an electric conductive material.

### Claim 2 (depends on 1)

The power conversion device according to claim 1, wherein the first fixing member and the second fixing member are disposed on the same plane.

### Claim 3 (depends on 2)

The power conversion device according to claim 2, wherein
the power conversion device further comprises a bus bar that electrically connects the power module and the smoothing capacitor, and
the bus bar is disposed on the same plane as the first fixing member and the second fixing member.

### Claim 4 (depends on 1)

The power conversion device according to claim 1, wherein
the power conversion device further comprises a channel forming body that forms a flow channel of a cooling medium for cooling the power module, and
the channel forming body is fixed to the housing together with the power module by the first fixing member.

### Claim 5 (depends on 1)

The power conversion device according claim 1, wherein
the first fixing member and the second fixing member are made of the electric conductive material,
a shield layer that is an electric conductive layer is provided on a surface of the circuit board, and
the shield layer is disposed between the first fixing member and the second fixing member.

### Claim 6 (depends on 1)

The power conversion device according to claim 1, wherein at least one of the first fixing member and the second fixing member has an elastic force.