Electronic power converter apparatus comprising mutually superimposed converter modules and a forced-ventilation cooling unit

An electronic power converter apparatus comprising:

• a box-like body comprising a first base wall and an opposite second base wall joined to each other by a first side wall and a second side wall and by a bottom wall orthogonal to said base walls, said first and second side walls and said bottom wall extending orthogonally from said base walls along a main longitudinal extension direction of the box-like body to delimit, with said base walls, a housing compartment accessible from outside through an insertion opening opposite to the bottom wall;
• a first converter module and at least a second converter module accommodated in said housing compartment of the box-like body so that said first converter module is proximal to said first base wall and said at least a second converter module is superimposed on said first converter module along said main longitudinal extension direction of the box-like body, said first converter module and at least a second converter module comprising a first and at least a second electronic circuitry, respectively, adapted to dissipate electrical energy by generating heat inside the box-like body;
• a forced-ventilation cooling unit comprising a first heat dissipation device and at least a second heat dissipation device associated with said first and at least second converter modules, respectively, said first and at least second heat dissipation devices being configured to convey cooling air flows entering into the interior of the box-like body of the electronic converter apparatus and to convey corresponding heated air flows exiting from said box-like body, to cool said first and at least second converter modules by removing at least partially heat generated by said first and at least a second electronic circuitries;
• wherein said first heat dissipation device is housed in said first converter module to be interposed between said first side wall of the box-like body and a median plane of the box-like body parallel to and equally spaced apart from said first and second side walls;
• wherein the at least a second heat dissipation device is housed in said at least a second converter module to be interposed between said second side wall of the box-like body and said median plane.