| 摘要 |
<p>The invention concerns an electronic power circuit comprising at least an electronic power chip (2, 3), a heat dissipating radiator (4) having passages for circulating a liquid coolant, and a substrate (10) whereon the chip is brazed and which is arranged between the radiator (4) and the chip (2, 3). The radiator (4) comprises a base plate (6), made in electrically insulating ceramics, the base plate (6) having channels emerging in a first surface. The radiator further comprises a closure element (7) directly mounted on the first surface of the base plate for defining, with the channels, passages circulating the liquid coolant. The invention is useful for producing power converters for railway vehicles. (Fig. 1)</p> |
