Outer-rotor-type-engine-driven-dc-output unit

An outer-rotor-type-engine-driven-DC-output unit comprising:

• an engine;
• an outer-rotor-type-electric generator including an inner stator and an outer rotor, the outer-rotor-type-electric generator being configured to be driven by the engine;
• a DC-output-power converter that includes a chassis, the DC-output-power converter being configured to convert electric power generated by the outer-rotor-type-electric generator to DC power, and to output the DC power;
• a fan configured to cool the outer-rotor-type-electric generator and the DC-output-power converter, wherein the engine, the outer-rotor-type-electric generator, the DC-output-power converter, and the fan are integrated as a unit;
• and
• a cooling mechanism including
• a first intake system in which first air drawn in by the fan through a first intake port passes around the inner stator of the outer-rotor-type-electric generator, then passes through the fan, and then passes around the chassis of the DC-output-power converter, and
• a second intake system in which second air drawn in by the fan through a second intake port passes through the fan and then passes around the chassis of the DC-output-power converter without passing around the inner stator of the outer-rotor-type-electric generator,
• the cooling mechanism being configured such that
• the first intake port, the inner stator, the fan, and the second intake port are arranged, in this order, in an axial direction of a rotation axis of the outer-rotor-type-electric generator,
• the inner stator is cooled by the first air before passing around the chassis of the DC-output-power converter, and
• the DC-output-power converter is cooled by both the first air in the first intake system after cooling the inner stator, and the second air in the second intake system, without the second air having been used for cooling the inner stator.