Power Conversion Control Board Noise Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing motor control device experiences noise emission issues due to the drive line noise from the transformers in the power source control circuit, which is not effectively mitigated by existing technologies.
Innovation Solution
A control board for a power conversion device is designed with a multi-layer board, featuring drive circuits, a power source control circuit insulated from the drive circuits, insulation transformers connecting them in an insulated state, and connecting lines that extend into the inner layers of the board to prevent noise emission, utilizing a half-bridge circuit structure and specific layering to shield noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the connecting line is arranged only on the surface of the board main body, then the layout is simple, but noise is emitted to the outside from the drive line
Solution Approach 1:
The connecting line is extended from the surface layer to the inner layers of the multi-layer board, utilizing the vertical dimension (depth) to route the line through the insulation region. This dimensional transition allows the connecting line to pass through the insulation region without adding horizontal complexity, effectively shielding noise while maintaining layout simplicity.
2Area of stationary object
If the board size is reduced, then the overall device becomes more compact, but noise shielding effectiveness may be compromised
Solution Approach 1:
The connecting line is nested within the inner layers of the multi-layer board structure, utilizing the vertical space between layers to route through the insulation region. This nesting approach allows effective noise shielding without increasing the horizontal footprint of the board, maintaining compact dimensions while preventing noise emission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively prevents the noise from the drive line from being emitted outside, reducing the board's size by utilizing inner layers for connections and shielding, thereby minimizing noise influence on electronic components.
Implementation Method 1
an insulation region that is formed on the surface of the board main body, and that insulates the power source control circuit and the plurality of drive circuits from each other
Implementation Method 2
at least a part of which extends in a region in inner layers of the board main body that overlaps the insulation region when viewed in a perpendicular direction with respect to the surface of the board main body
Data Source
AI summary
A control board of a power conversion device, the control board includes a board main body, a plurality of drive circuits, a power source control circuit, an insulation region, a plurality of insulation transformers, and a connecting line that electrically connects the plurality of insulation transformers and the power source control circuit to each other, and at least a part of which extends in a region in inner layers of the board main body that overlaps the insulation region when viewed in a perpendicular direction with respect to the surface of the board main body.