Micro-Inverter Board Separation for Thermal Isolation and Longevity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing micro-inverters face challenges in achieving a 25-year lifespan due to high internal temperatures, which reduce the longevity of components like electrolytic capacitors and control circuits.
Innovation Solution
The solution involves mounting heat-generating components and non-heat-generating components on different boards and separating them through a thermal resistance medium, such as air, to reduce the temperature of non-heat-generating components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If all electronic components are encapsulated with thermosetting epoxy potting compound, then the structural integrity and protection of components is improved, but the temperature inside the case increases significantly, reducing component longevity
Solution Approach 1:
The patent divides the internal components into two separate groups mounted on different boards: heat-generating components (power switches, isolation transformer) and non-heat-generating components (control circuits, electrolytic capacitors). This segmentation allows differential thermal management where heat-generating components can be properly cooled while non-heat-generating components are protected from excessive heat exposure, resolving the contradiction between structural integrity and temperature control.
Solution Approach 2:
The patent introduces a thermal resistance medium positioned between the heat-generating components and non-heat-generating components. This intermediary element blocks the transmission of heat from the power conversion components to the sensitive electronic components, allowing the potting compound to provide structural integrity without causing excessive temperature rise in all components.
2Volume of moving object
If heat-generating components are mounted close to non-heat-generating components, then the device size is reduced, but the temperature of non-heat-generating components increases, reducing their lifespan
Solution Approach 1:
The patent addresses the spatial conflict by utilizing the third dimension (vertical separation) rather than increasing horizontal distance. By mounting heat-generating and non-heat-generating components on different boards stacked vertically and separating them with a thermal resistance medium in the Z-direction, the patent maintains compact footprint while effectively isolating thermal pathways, thus resolving the contradiction between device size and component temperature.
3Volume of moving object
If the micro-inverter is designed with compact packaging, then the installation space is reduced, but the thermal management becomes difficult, reducing component longevity
Solution Approach 1:
The patent segments the compact packaging into thermally isolated zones by dividing components into heat-generating and non-heat-generating groups on separate boards. This segmentation enables effective thermal management within a compact volume by preventing heat accumulation in sensitive areas, thus maintaining component longevity despite reduced packaging volume.
Solution Approach 2:
In the compact packaging design, the thermal resistance medium serves as a critical intermediary element that enables thermal isolation between closely spaced component groups. This mediator allows the micro-inverter to achieve both compact dimensions and reliable thermal management by blocking heat transmission pathways in the limited space available.
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 approach effectively reduces the temperature of non-heat-generating components by 30-50 degrees, significantly extending their lifespan and improving the overall longevity of the micro-inverter.
Implementation Method 1
separating the heat-generating components and non-heat-generating components through a thermal resistance medium
Data Source
AI summary
An apparatus includes a first component group on a first board, a second component group on a second board, wherein components of the first component group are heat-generating elements configured to generate more heat than components of the second component group, and a plurality of connecting elements electrically coupled between the first component group and the second component group, wherein portions of the plurality of connecting elements are in a thermal resistance medium, and the first component group and the second component group are separated by the thermal resistance medium.