Patent ID: 8767401

Claim:
An inverter stack, comprising: an enclosure on which an inlet port is formed at a lower end thereof and an outlet port is formed at an upper end thereof, the enclosure defining an internal space; a heat sink having a switching element, disposed within an upper region of the internal space, the heat sink partitioning the internal space of the enclosure to form an air passage through which air drawn in from the inlet port flows to the outlet port; a plurality of DC-link capacitors disposed within the internal space and below the heat sink, and a bus plate disposed at a side of the DC-link capacitors to extend the air passage in cooperation with the heat sink, the bus plate connecting the polarities P(+), N(−) of the DC-link capacitors, wherein the enclosure comprises a bottom plate disposed at a bottom portion thereof, an upper plate disposed at an upper side of the bottom plate to be separated therefrom by a predetermined distance, a front surface plate, a rear surface plate, and both lateral surface plates disposed to block lateral portions of the bottom plate and upper plate, wherein the heat sink comprises a heat-dissipating plate and a plurality of heat-dissipating fins protruded from one side surface of the heat-dissipating plate and separately disposed in parallel to one another, and the heat-dissipating plate partitions the internal space of the enclosure in a frontward and rearward direction to form the air passage, wherein the bus plate is disposed below the heat-dissipating plate, and a lower end of the bus plate contacts the bottom plate of the enclosure, wherein the heat-dissipating plate and the bus plate partition the internal space of the enclosure into two spaces in a frontward and reward direction, and wherein a front space of the two spaces partitioned by the heat-dissipating plate and the bus plate is a circuit element chamber and a rear space thereof is the air passage through which the air drawn from the inlet port flows to the outlet port.