| 摘要 |
PROBLEM TO BE SOLVED: To suppress noise, generated from a driving line for driving a transformer by a power supply control circuit, from being emitted to the outside.SOLUTION: The control substrate of an electric power converter includes: a multilayer substrate, or a substrate main body; a plurality of driving circuits that are provided in respective arms of the electric power converter and drive switching elements that the corresponding arms have; a power supply control circuit; an insulation region that insulates a space between the power supply control circuit and the plurality of driving circuits; a plurality of insulation transformers that are provided corresponding to the plurality of driving circuits respectively, are arranged across the insulation region on a surface of the substrate main body, and join the power supply control circuit to the corresponding driving circuits respectively while insulating the circuits; and a connection line that connects electrically the plurality of insulation transformers to the power supply control circuit, at least part of which extends to a region overlapping with the insulation region in the inner layer of the substrate main body when viewed in a direction perpendicular to the surface of the substrate main body.SELECTED DRAWING: Figure 5 |
