Power Conversion Device, Cooling Structure, Power Conversion System, and Power Supply Device

A cooling structure comprising:

• a heat pipe;
• a fin disposed at the heat pipe;
• and
• a first fin region and a second fin region formed by disposing a partition portion that partitions the fin into a plurality of regions in an extending direction of the heat pipe,
• wherein air passing through the first fin region heats the heat pipe positioned at the first fin region, and air passing through the second fin region cools the heat pipe positioned at the second fin region.

A power conversion system comprising:

• a power conversion device;
• and
• a cooling structure that includes a heat pipe, a fin disposed at the heat pipe, and a first fin region and a second fin region formed by disposing a partition portion that partitions the fin into a plurality of regions in an extending direction of the heat pipe, air passing through the first fin region heating the heat pipe positioned at the first fin region, and air passing through the second fin region cooling the heat pipe positioned at the second fin region,
• wherein air discharged from the power conversion device passes through the first fin region, and external air passes through the second fin region.

A power supply device,

• wherein a power conversion unit includes a single-phase inverter on a secondary side of a resonant type converter that has an input of a direct current, a power conversion unit group is configured by connecting outputs of the single-phase inverters of a plurality of the power conversion units in series, and respective phases of three phase alternate current are formed with the three power conversion unit groups housed in a power conversion device housing,
• the plurality of power conversion units constituting the power conversion unit group are disposed along a longitudinal direction of the power conversion device housing, and the respective three power conversion unit groups are disposed at an upper stage, a middle stage, and a lower stage in a height direction of the power conversion device housing,
• the power conversion device housing has one end side in the longitudinal direction as an output terminal for the three power conversion unit groups, and the power conversion device housing has the other end side in the longitudinal direction where terminals of the three power conversion unit groups are connected in common, and
• heat exchangers are disposed on right and left sides of the power conversion device housing in the longitudinal direction, the heat exchangers have fin structures connected to heat pipes, a first fin region contacting internal air heated by the power conversion unit groups in the power conversion device housing and a second fin region contacting external air are connected by the heat pipe so as to circulate the cooled internal air in the power conversion device housing.