Power conversion apparatus

A power conversion apparatus, comprising:

• a housing having a base plate;
• a first circuit board;
• one or more switching transistors;
• one or more inductors;
• a plurality of capacitors;
• wherein the first circuit board, the one or more switching transistors, the one or more inductors, and the plurality of capacitors are disposed within the housing;
• wherein the first circuit board is disposed opposite to the base plate in a first direction;
• wherein the one or more switching transistors, the one or more inductors, and the plurality of capacitors are all fastened to the first circuit board and disposed between the first circuit board and the base plate;
• wherein the base plate further comprises a first chamber, a second chamber, and a third chamber sequentially communicating with one another;
• wherein the first chamber is configured to accommodate the plurality of capacitors;
• wherein the second chamber is configured to accommodate the one or more switching transistors;
• wherein the third chamber is configured to accommodate the one or more inductors;
• and,
• wherein a depth of the second chamber is less than a depth of the first chamber and less than a depth of the third chamber in the first direction.