| 摘要 |
PROBLEM TO BE SOLVED: To provide a power unit having a weight balance and a size, which are suitable for mounting the power unit on a wall. SOLUTION: The enclosure of a power unit is divided into a central chamber 6 and side chambers 4 and 5 on both sides of the central chamber 6, and at the same time, the central chamber 6 is further divided into a front chamber 6A and a rear chamber 6B. In the central chamber 6, a substrate 18 mounted with a power-converting element 17, such as power transistor, etc., which generates high heat on its front side and fitted with heat radiating fins 18F on its back side is arranged in the rear chamber 6B. and a substrate 51 mounted with an electronic circuit element composed of the other transistors, etc., is arranged own the front chamber 6A. On the other hand, a noise filter 22 composed of a reactor having a core, a capacitor, and a coil is arranged separately in the side chambers 4 and 5 on both sides of the central chamber 6. |
