Cooling arrangement for power supply apparatus

摘要

The power supply apparatus has a plurality of power modules (1), a holder-case (2), and a fan (39,49). The holder-case (2) is box shaped with a first surface plate (2a) and second surface plate (2b) as two surfaces, and contains a plurality of power modules (1) arranged laterally, parallel, and in the same plane. Walls (3) are provided between the plurality of laterally arranged power modules (1), and divide the holder-case (2) interior into a plurality of rows of partitions (4). One row of power modules (1) is disposed in each partition (4) row. The power supply apparatus uses the fan (39,49) to divide and induce air flow through flow inlets (13) in the first surface plate (2a) into the plurality of partitions (4), and expels air out exhaust outlets (14) in the second surface plate (2b) to cool power modules (1) disposed inside each partition (4).