| 摘要 |
PROBLEM TO BE SOLVED: To provide a power module which is thin, lightweight, and inexpensive and has a high reliability and a high performance. SOLUTION: The power module includes: a plurality of IGBTs 3a to 3m; a plurality of drive circuits 42 for individually driving each of the IGBTs 3a to 3m; a plurality of driving power circuits for individually supplying an electric power to each of the drive circuits 42; and a printed circuit board 30 on which each of the drive circuits 42 and each of the driving power circuits are loaded, wherein each of the driving power circuits contains a power supply transformer 50 for transmitting the electric power, and the power supply transformer 50 is constituted by: primary and secondary coil patterns 70a, 70b which are arranged in a printed circuit board 30; and a core 71 which is mounted on the printed circuit board 30 and carries out electromagnetic coupling with each of the coil patterns 70a, 70b. COPYRIGHT: (C)2008,JPO&INPIT |
