Motor Printed Circuit Board Integrated Capacitor Grounding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Printed circuit boards for motors have large sizes due to large electronic components and gaps between them, leading to significant parasitic inductance and capacitance, resulting in high electromagnetic radiation.
Innovation Solution
A printed circuit board design featuring a body with a first and second conductive pattern layer forming a capacitor, where the capacitor is grounded directly through slots instead of pins, reducing the volume of electronic components and electromagnetic radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electronic components are directly welded to the printed circuit board, then the motor can be assembled, but the printed circuit board size becomes large due to component sizes and gaps
Solution Approach 1:
The patent merges the capacitor function with the printed circuit board structure itself by forming conductive pattern layers directly on the board substrate. This integration eliminates the need for separate capacitor components and their associated mounting space, thereby reducing the overall PCB area while maintaining the necessary electrical functions
Solution Approach 2:
The printed circuit board is designed to serve multiple functions simultaneously: it provides mechanical support, electrical connections through traces, and energy storage through the integrated capacitor formed by conductive pattern layers. This multi-functionality reduces the need for separate dedicated components, shrinking the overall board size
2Reliability
If electronic components are used with pins for grounding, then the circuit can be completed, but parasitic inductance and capacitance increase causing electromagnetic radiation
Solution Approach 1:
The patent extracts the harmful pin structures from the grounding path and replaces them with direct conductive pattern layer connections on the PCB. By removing the pins that introduce parasitic inductance and capacitance, the design eliminates the source of electromagnetic radiation while maintaining effective grounding and circuit functionality
Solution Approach 2:
The patent replaces the mechanical pin-based grounding system with an integrated conductive pattern layer system on the PCB. This substitution eliminates the mechanical connections that create parasitic elements, using instead the PCB's own conductive structures to achieve both grounding and energy storage functions with reduced electromagnetic radiation
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
The solution effectively reduces the volume of electronic components and significantly minimizes electromagnetic radiation by integrating a capacitor directly on the printed circuit board and grounding it without using pins, as shown in EMI radiation tests.
Implementation Method 1
The first conductive pattern layer and the second conductive pattern layer form a capacitor
Data Source
AI summary
A printed circuit board includes a body, a first conductive pattern layer disposed on a first surface of the body, and a second conductive pattern layer disposed on a second surface of the body. The first conductive pattern layer and the second conductive pattern layer form a capacitor. The present disclosure further provides an motor having the printed circuit board.