| 摘要 |
In an electric power conversion apparatus, there is reduced deterioration in insulation of a means which is provided inside an IC chip and transmits a signal from a low electric potential system to a high electric potential system. The electric power conversion apparatus includes a lower-arm circuit 14 which transmits control signals from a micro computer 10 through the pulse transformers 22 and 23 provided inside an IC chip and outputs the control signal transmitted through the pulse transformer 23 to a lower-arm IGBT 1, a high-voltage nMOS 30 which converts the electric potential of the control signal for an upper-arm IGBT 3 transmitted through the pulse transformer 22 of the lower-arm circuit 14 and an upper-arm circuit 15 which outputs the control signal of which the electric potential is converted by the high-voltage nMOS 30 to the upper-arm IGBT 3.
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