| 摘要 |
PROBLEM TO BE SOLVED: To install an exhaust fan on a side face with a simple configuration even in a place in which there is no maintenance space on a ceiling part to secure air quantity required for a power conversion device.SOLUTION: A cooler of a power conversion device includes:, in a case, converter boards which accommodate semiconductor power conversion units; control boards which are connected to the converter boards and arranged on the side face sides thereof; cooling air suction parts which are formed on the front face of the converter boards; an exhaust duct which is arranged on the top faces of the converter boards and connected to the control boards; exhaust fans which are arranged on the side faces of the control boards; and an air channel which is arranged in the converter boards to supply cooling air sucked by the cooling air suction parts to the control boards through the semiconductor power conversion units. A first cooling air passage which connects the cooling air suction parts and the exhaust fans through the air channel and a second cooling air passage which connects the cooling air suction parts and the exhaust fans through the exhaust duct are also formed in the cooler of the power conversion device. |
