| 摘要 |
<p>Provided is an electric power converter, wherein the cooling capability is not weakened when the width of the converter is reduced. The converter (1) comprises a radiator (20), three power modules (36a, 36b and 36c), a diode module (32), a wind tunnel casing (10), an upper fan (2) and a lower fan (3). The radiator (20) includes a radiator pedestal (21), an upper fin group (22) and a lower fin group (23), wherein the upper fin group (22) and lower fin group (23) are arranged at the rear surface (a) of the radiator pedestal (21). The three power modules (36a, 36b and 36c) and diode module (32) are arranged at the front surface (21b) of the radiator pedestal (21). The wind tunnel casing (10) accommodates the upper fin group (22) and lower fin group (23) to form a wind tunnel (1) which is used as a ventilation space of cooling air, and air vents (130) are formed at corresponding positions between the upper fin group (22) and lower fin group (23). The upper fan (2) is arranged at the upper end portion of the wind tunnel casing (10) so that the cooling air passes the upper fin group (22); and the lower fan (3) is arranged at the lower end portion of the wind tunnel casing (10) so that the cooling air passes the lower fin group (23).</p> |
