| US 7,515,422 B2 | ||
| Electric power converter | ||
| Masayuki Hirota, Narashino (Japan); Satoshi Ibori, Yachimata (Japan); Tomoya Kamezawa, Narashino (Japan); Jiangming Mao, Narashino (Japan); and Masahiro Hiraga, Yotsukaidou (Japan) | ||
| Assigned to Hitachi Industrial Equipment System Co., Tokyo (Japan) | ||
| Filed on Dec. 21, 2006, as Appl. No. 11/642,717. | ||
| Claims priority of application No. 2006-150874 (JP), filed on May 31, 2006. | ||
| Prior Publication US 2007/0279864 A1, Dec. 06, 2007 | ||
| Int. Cl. H05K 7/20 (2006.01) | ||
| U.S. Cl. 361—709 [361/690; 361/807; 174/351; 174/295] | 7 Claims |
| 1. An electric power converter comprising:
a rectifying part for converting supplied alternating current power into direct current power;
a smoothing part for smoothing output from the rectifying part;
an inverse transforming part for converting output from the smoothing part into alternating current power;
a controlling part for controlling the inverse transforming part;
a cooling part for cooling heat generated at least in the inverse transforming part, the cooling part comprising a fin for
dissipating heat and a base surface on which the fin is supported; and
a housing for supporting the rectifying part, the smoothing part, the inverse transforming part, the controlling part and
the cooling part, wherein
an atmosphere limiting part for changing flow of atmosphere flowing in the cooling part is provided at an opening portion
of the fin on an opposite side to the base surface of the cooling part.
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