| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric power conversion system which can perform a bidirectional optical transmission while keeping a desired isolation voltage, and can contribute for suppression of a size and a cost.SOLUTION: A bidirectional optical transmission part 3 is existed in implementation surfaces position at a control circuit part 1 and a driving circuit part 21 so as to be faced each other and the implementation surfaces position at adjacent driving circuit parts 21 to 26 so as to be faced each other. In the driving circuit part 2 positioned between adjacent bidirectional optical transmission part 3 of the driving circuit parts 21 to 26, a relay branching part 6 performing relay or branching a signal transmission in the adjacent bidirectional optical transmission part 3 is provided. In a gate element 81 of the bidirectional optical transmission part 3, and a peripheral side of light receiving elements 81b and 82b in a state element 82, or the peripheral side of light emitting elements 81a and 82a, cylindrical light-shielding walls 81f and 82f projected along signal transmission paths 81d and 82d from the component sides and enclosing the peripheral side are provided.SELECTED DRAWING: Figure 1 |
