Power converter

Patent metadata

Field	Value
Publication number	US-9887641-B2
Application number	US-201715467565-A
Country	US
Kind code	B2
Filing date	Mar 23, 2017
Priority date	Apr 1, 2016
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

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.

First claim

What is claimed is:

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.

2. 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.

3. 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.

4. 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.

5. 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.

Assignees

• Murata Manufacturing Co

Inventors

• Kitada Hiroshi

Classifications

• H02M1/12

  Arrangements for reducing harmonics from AC input or output · CPC title

• H02M7/5387 Primary

  in a bridge configuration · CPC title

• H02M7/003

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• H02M1/126 Primary

  using passive filters · CPC title

• H02M1/123

  Suppression of common mode voltage or current · CPC title