POWER CONVERSION APPARATUS

• US 20160165716A1
• Filed: 12/03/2015
• Published: 06/09/2016
• Est. Priority Date: 12/03/2014
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Automotive Electronics Company Limited (Nidec Corporation)
• Inventors: Ido, Yusaku, Yamada, Takashi, Fujiwara, Akihiro
• Granted Patent: US 9,642,242 B2
• Time in Patent Office: Days
• CPC Class Codes: H05K 1/0272 Adaptations for fluid transport, e.g. channels, holes
• CPC Class Codes: H05K 2201/064 Fluid cooling, e.g. by integral pipes
• CPC Class Codes: H05K 7/1432 specially adapted for power drive units or power converters
• CPC Class Codes: H05K 7/14322 wherein the control and power circuits of a power converter are arranged within the same casing

Abstract

An AC/DC converter of a power conversion apparatus includes filters, a PFC circuit, a first full bridge circuit, a first transformer, and a first rectifier circuit and converts an AC voltage supplied from the outside to a DC voltage. A DC/DC converter includes filters, a second full bridge circuit, a second transformer, and a second rectifier circuit and lowers a DC voltage output from the AC/DC converter. Constituent circuits of the AC/DC converter located on the primary side of the first transformer are mounted on the upper face of a cooling chassis which cools both the converters. Constituent circuits of the AC/DC converter located on the secondary side of the first transformer and constituent circuits of the DC/DC converter are mounted on the lower face of the cooling chassis.

Claims

1. A power conversion apparatus comprising:

an AC/DC converter configured to convert an AC voltage supplied from the outside to a DC voltage, the AC/DC converter including

a first filter circuit to which an AC voltage supplied from the outside is input,

a power factor correction circuit connected to an output side of the first filter circuit,

a first switching circuit connected to an output side of the power factor correction circuit,

a first transformer having a primary side connected to an output side of the first switching circuit, and

a first rectifier circuit connected to a secondary side of the first transformer;

a DC/DC converter configured to convert a DC voltage output from the AC/DC converter to a different DC voltage, the DC/DC converter including

a second filter circuit to which a DC voltage output from the AC/DC converter is input,

a second switching circuit connected to an output side of the second filter circuit,

a second transformer having a primary side connected to an output side of the second switching circuit, and

a second rectifier circuit connected to a secondary side of the second transformer; and

a cooling body configured to cool both the AC/DC converter and the DC/DC converter,

wherein constituent circuits of the AC/DC converter located on the primary side of the first transformer are mounted on an upper face of the cooling body, and

wherein constituent circuits of the AC/DC converter located on the secondary side of the first transformer and constituent circuits of the DC/DC converter are mounted on a lower face of the cooling body.

2. The power conversion apparatus according to claim 1, wherein the first transformer is mounted on the upper face or the lower face of the cooling body.

3. The power conversion apparatus according to claim 2, further comprising:

an upper board attached to the upper face of the cooling body; and

a lower board attached to the lower face of the cooling body,

wherein some of electronic components located on the primary side of the first transformer of the AC/DC converter are mounted on the upper face of the cooling body with the upper board interposed therebetween, and

wherein some of electronic components located on the secondary side of the first transformer of the AC/DC converter and some of electronic components of the DC/DC converter are mounted on the lower face of the cooling body with the lower board interposed therebetween.

4. The power conversion apparatus according to claim 3, further comprising:

a first controller configured to control operation of the AC/DC converter; and

a second controller configured to control operation of the DC/DC converter,

wherein the first controller is mounted on the upper board, and

wherein the second controller is mounted on the lower board.

5. The power conversion apparatus according to claim 4,

wherein the AC/DC converter is configured to convert an AC voltage supplied from the outside to a DC voltage for charging a high-voltage battery for a vehicle,

wherein the DC/DC converter is configured to convert a DC voltage output from the AC/DC converter to a DC voltage for driving an auxiliary machine for the vehicle, and

wherein the high-voltage battery is charged with the DC voltage output from the AC/DC converter, and the DC voltage output from the DC/DC converter is supplied to the auxiliary machine.