| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a reliable power module that accurately detects overheating of a power element in real time and cools it. <P>SOLUTION: In a power module for power electronics circuits having a metal heat sink 1, an insulating board 2 stuck onto the heat sink 1, and a power element 5 stuck to the insulating board 2, a thermoelectric module 14 is arranged at a position that is stuck to or near a power element 5. In the thermoelectric module 14, insulating boards 14b, c are provided on both surfaces of a thermoelectric semiconductor device 14a for carrying out thermoelectric conversion. Via an external terminal 14f, the thermoelectric module 14 is connected to a decision circuit 16 for deciding the output value of the thermoelectric module 14 and a protective circuit 17 for supplying power to the thermoelectric module 14 for deciding the size of the output value by the decision circuit 16. When the output value is larger than a preset decision reference value, the protective circuit 17 is made to conduct electricity. <P>COPYRIGHT: (C)2003,JPO</p> |
