Power supply device

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.

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.