Power Converter PCB Layout for Compact Module-Capacitor Packaging
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Solution Overview
Problem
Existing power conversion devices lack miniaturization capabilities, as described in Patent Literature 1, which restricts their compactness and efficiency.
Innovation Solution
A power conversion device design where a circuit board straddles between the power module and the smoothing capacitor, fixed by a first and second fixing member, allowing for reduced height dimensions and effective noise shielding through conductive materials and elastic support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the circuit board is arranged in the same plane region as the high-voltage terminals and power modules, then the device structure is simplified, but the device size cannot be miniaturized
Solution Approach 1:
The circuit board is positioned to straddle between the power module and smoothing capacitor in the vertical direction, transitioning from a planar arrangement to a three-dimensional stacked configuration. This dimensional change allows components to be arranged in layers rather than spread out in a single plane, achieving miniaturization while maintaining structural integrity through fixing members that secure the circuit board to the housing.
2Volume of moving object
If the circuit board straddles between the power module and smoothing capacitor, then the device is miniaturized, but the circuit board requires additional fixing mechanisms
Solution Approach 1:
The fixing members serve multiple functions: they secure the circuit board to the housing, provides mechanical support for the circuit board in the straddled position, and can simultaneously act as heat dissipation paths or electrical connections. This multi-functionality reduces the need for separate dedicated fixing components, minimizing added complexity while achieving the miniaturization goal.
Data Source
AI summary
A power conversion device can be miniaturized.A power conversion device includes a power module that performs switching operation, a smoothing capacitor that smooths a voltage ripple caused by the switching operation, a circuit board that controls driving of the power module, a housing that accommodates the power module and the smoothing capacitor, a first fixing member for fixing the power module to the housing, and a second fixing member for fixing the smoothing capacitor to the housing. The circuit board straddles between the power module and the smoothing capacitor, and is fixed by the first fixing member and the second fixing member.