# US 10,312,727 B2 · Power supply device

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- Number: US 10,312,727 B2
- Document ID: US10312727B2
- Status: Granted
- Kind: B2
- Application number: 15/390,554
- Filed: 2016-12-26
- Published: 2017-08-24
- Granted: 2019-06-04
- Earliest claimed: 2016-02-22
- Assignees: Fuji Electric Co., Ltd.
- Applicants: Fuji Electric Co., Ltd.
- Inventors: Hiroyuki Kobayashi; Hiromu Takubo
- Web page: https://patentgrep.com/patent/US10312727B2

## CPC

- H02J 9/061: {for DC powered loads}
- H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)}
- H02M 7/06: using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M 7/44: by static converters
- H05K 7/20172: {Fan mounting or fan specifications}
- H05K 7/20409: {Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing}
- H05K 7/20909: {Forced ventilation, e.g. on heat dissipaters coupled to components}
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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

In power supply devices, it is prevented to cool the components that actually do not need to be cooled. A power supply device includes a first converter configured to convert AC power from an AC power source into DC power, a second converter configured to convert a voltage to charge a backup electrical storage unit with the DC power from the first converter and to cause the electrical storage unit to discharge DC power, a plurality of cooling units configured to individually cool the first converter and the second converter, and a controller configured to change an operational state of the plurality of cooling units depending on an operational status of the power supply device.

## Claims

### Claim 1

A power supply device comprising;
a first converter configured to convert AC power from an AC power source into DC power;
a second converter configured to convert a voltage to charge a backup electrical storage unit with the DC power from the first converter and to cause the electrical storage unit to discharge DC power;
a plurality of cooling units configured to individually cool the first converter and the second converter; and
a controller configured to change an operational state of the plurality of cooling units depending on control signals that cause the first converter and the second converter to operate.

### Claim 2

A power supply device comprising;
a first converter configured to convert AC power from an AC power source into DC power;
a second converter configured to convert a voltage to charge a backup electrical storage unit with the DC power from the first converter and to cause the electrical storage unit to discharge DC power;
a third converter configured to convert, into AC power, at least one of the DC power discharged from the electrical storage unit and the DC power fed from the first converter and feeds the AC power to a load;
a plurality of cooling units configured to individually cool the first to third converters; and
a controller configured to change an operational state of the plurality of cooling units depending on an operational status of the power supply device.

### Claim 3 (depends on 2)

The power supply device as set forth in claim 2, wherein
the controller causes a cooling unit to operate corresponding to a converter in operation selected from among the first converter, the second converter and the third converter.

### Claim 4 (depends on 2)

The power supply device as set forth in claim 2, wherein
the controller controls a cooling unit corresponding to a converter in operation selected from among the first converter, the second converter and the third converter to produce stronger cooling effects than when the selected converter is out of operation.

### Claim 5 (depends on 2)

The power supply device as set forth in claim 2, wherein
the power supply device has a first chamber, a second chamber and a third chamber partitioned from each other,
the first chamber, the second chamber and the third chamber respectively house therein the first converter, the second converter and the third converter,
the first chamber, the second chamber and the third chamber are respectively provided with a first cooling fan, a second cooling fan and a third cooling fan, and
the first cooling fan, the second cooling fan and the third cooling fan serve as the plurality of cooling units and respectively cool the first converter, the second converter and the third converter.

### Claim 6 (depends on 5)

The power supply device as set forth in claim 5, wherein
the first converter, the second converter and the third converter respectively include semiconductor elements, and
the first chamber, the second chamber and the third chamber are respectively provided with fins to dissipate heat generated by the semiconductor elements.

### Claim 7

A power supply device comprising;
a first converter configured to convert AC power from an AC power source into DC power;
a second converter configured to convert a voltage to charge a backup electrical storage unit with the DC power from the first converter and to cause the electrical storage unit to discharge DC power;
a third converter configured to convert, into AC power, at least one of the DC power discharged from the electrical storage unit and the DC power fed from the first converter and feeds the AC power to a load;
a plurality of cooling units configured to individually cool the first to third converters; and
a controller configured to change an operational state of the plurality of cooling units depending on an operational status of the power supply device, wherein
the power supply device has a first chamber, a second chamber and a third chamber partitioned from each other,
the first chamber, the second chamber and the third chamber respectively house therein the first converter, the second converter and the third converter,
the first chamber, the second chamber and the third chamber are respectively provided with a first cooling unit, a second cooling unit and a third cooling unit, and
the first cooling unit, the second cooling unit and the third cooling unit serve as the plurality of cooling units and respectively cool the first converter, the second converter and the third converter,
the operational status of the power supply device is selected from among:
a normal mode of operation in which the AC power source is transmitting power and the electrical storage unit is fully charged;
an electrical storage unit charge mode of operation in which the AC power source is transmitting power and the electrical storage unit is not fully charged; and
an electrical storage unit discharge mode of operation in which the AC power source is suspending the power transmission,
in the normal mode of operation, the first converter and the third converter operate and the controller causes the first cooling unit and the third cooling unit to operate,
in the electrical storage unit charge mode of operation, the first converter, the second converter and the third converter operate, and the controller causes the first cooling unit, the second cooling unit and the third cooling unit to operate, and
in the electrical storage unit discharge mode of operation, the second converter and the third converter operate, and the controller causes the second cooling fan unit and the third cooling unit to operate.

### Claim 8 (depends on 7)

The power supply device as set forth in claim 7, wherein
the operational status of the power supply device is selected further from
a mode in which the first converter and the second converter operate when the load does not need to be powered, the AC power source is transmitting power and the electrical storage unit is not fully charged, and
in the mode in which the first converter and the second converter operate, the controller causes the first cooling unit and the second cooling unit to operate.

### Claim 9 (depends on 8)

The power supply device as set forth in claim 8, wherein
the first cooling unit, the second cooling unit and the third cooling unit are a first cooling fan, a second cooling fan and a third cooling fan, respectively.