Photovoltaic Inverter Layout for Compact Cooling and Wiring Reliability
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Solution Overview
Problem
Photovoltaic inverters have complex installation processes, are prone to cable connection faults, and suffer from poor cooling and large size, which affects stability and efficiency.
Innovation Solution
The photovoltaic inverter design features a reversely fastened circuit board with distinct subcavities for devices, thermally conductive connections for heat dissipation, and rigid fastening of the switch assembly to improve stability and reduce installation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cable connection methods are used in photovoltaic inverters, then electrical connectivity is achieved, but assembly complexity increases and connection faults become more frequent
Solution Approach 1:
The patent merges the electrical connection function directly into the circuit board by integrating connection terminals and conductive structures onto the board itself. This eliminates the need for separate cable connections between components and the circuit board, reducing assembly steps and potential connection faults while improving reliability.
Solution Approach 2:
The patent replaces traditional mechanical cable connections with direct electrical contacts through the circuit board. The connection terminals on the circuit board establish electrical connectivity through rigid or flexible printed circuit traces, substituting the mechanical cable assembly process with a more reliable electrical contact system.
2Temperature
If traditional cooling designs are used in photovoltaic inverters, then heat dissipation is achieved, but the inverter size becomes large
Solution Approach 1:
The patent utilizes the vertical dimension by designing cooling fins that extend perpendicular to the circuit board surface. This three-dimensional cooling structure increases the heat dissipation surface area without expanding the horizontal footprint of the inverter, allowing effective heat dissipation within a compact form factor.
Solution Approach 2:
The patent segments the cooling function into multiple cooling fins distributed across the inverter structure. Each fin acts as an independent heat dissipation element, collectively providing sufficient cooling capacity while maintaining a compact overall design. The segmented approach allows optimized heat distribution without requiring a single large cooling component.
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 design enhances cooling efficiency, reduces installation difficulty, minimizes size, and improves structural stability, leading to improved operational efficiency and reduced cable-related issues.
Implementation Method 1
The inverter power assembly is in thermally conductive connection to a part of the cooling fins through the thermally conductive contact part
Implementation Method 2
cooling fins, configured to cool the inverter power assembly
Data Source
AI summary
A photovoltaic inverter includes a housing, a circuit board, cooling fins, a switch assembly, and photovoltaic ports (PV ports). The circuit board is reversely fastened in the photovoltaic inverter. The circuit board partitions an accommodating cavity into a first subcavity and a second subcavity, and the first subcavity and the second subcavity accommodate a first device and a second device respectively. The second device includes an inverter power assembly fastened to a rear circuit board side. The cooling fins are located on a side that is of a bottom plate and that is away from a cover plate. The inverter power assembly is in thermally conductive connection to the cooling fins through a thermally conductive contact part. The switch assembly includes a knob, a connecting rod, and a switch body. The switch body includes breaking units. Pins of the breaking units are rigidly fastened to the rear circuit board side.