US 9,425,695 B2Granted

DC-DC converter

AssigneeHitachi Automotive Systems, Ltd.

InventorsHidenori Shinohara, Tatsuya Nakazawa, Keisuke Fukumasu, Yoshiharu Yamashita

Life of this patent

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Abstract

There is provided a device in which superimposition of noise radiated from a circuit is reduced, and a noise reducing effect of a filter is ensured. A DC-DC converter according to the present invention includes a transformer, a high voltage-side switching circuit section, a low voltage-side switching circuit section, a noise filter circuit section electrically disposed between the low voltage-side switching circuit section and the low voltage-side circuit section, a metallic case that houses the transformer, the high voltage-side switching circuit section, the low voltage-side switching circuit section, and the noise filter circuit section, a drive circuit board having a drive circuit that drives the low voltage-side switching circuit section, and a metallic base board having the drive circuit board mounted thereon. The case has a metallic partition wall connected to the case. The partition wall is disposed between the low voltage-side switching circuit section and the noise filter circuit section. The partition wall is connected to the base board.

Claims5

Dependent claims

A DC-DC converter comprising:

a transformer;
a high voltage-side switching circuit section electrically disposed between the transformer and a high voltage-side circuit section;
a low voltage-side switching circuit section electrically disposed between the transformer and a low voltage-side circuit section;
a noise filter circuit section electrically disposed between the low voltage-side switching circuit section and the low voltage-side circuit section;
a metallic case that houses the transformer, the high voltage-side switching circuit section, the low voltage-side switching circuit section, and the noise filter circuit section;
a drive circuit board having a drive circuit that drives the low voltage-side switching circuit section;
and
a metallic base board having the drive circuit board mounted thereon,
wherein the case has a metallic partition wall disposed in an interior portion of the case and connected to the case;
the partition wall is disposed between, and completely separates from each other, the low voltage-side switching circuit section and the noise filter circuit section;
and
the partition wall is connected to the base board.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/419,067Filed 28 Jun 2013
Priority: JP 2012-1724683 Aug 2012
Published: US 2015/0194898 A19 Jul 2015
Granted: 23 Aug 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H02M 3/33507
Using semiconductor devices only: with automatic control of the output voltage or current, e.g. flyback converters
H05K 7/20927
For power electronics, e.g. for inverters for controlling motor: liquid coolant without phase change
H05K 9/0037
Of components mounted on printed circuit boards [PCB]: housings with compartments containing a PCB, e.g. partitioning walls
H02M 1/44
Details of apparatus for conversion: circuits or arrangements for compensating for electromagnetic interference in converters or inverters