Steering engine three-dimensional electronic system based on rigid-flex printed board

The invention relates to a three-dimensional electronic system for a steering engine based on rigid-flex printed boards. The three-dimensional electronic system comprises four layers of printed boards which are stacked from top to bottom, the top printed board bears and installs a telemetering control unit of a steering engine, the middle printed board bears and installs a low-power unit of the steering engine, the secondary middle printed board bears and installs a power driving unit of the steering engine, and the bottom printed board bears and installs a power supply unit; the top layer printed board and the middle layer printed board are connected through a first interlayer flexible printed board; the top layer printed board and the secondary middle layer printed board are connected through a second interlayer flexible printed board; and the secondary middle-layer printed board is connected with the bottom-layer printed board through a third interlayer flexible printed board. According to the three-dimens