Chessboard Power Switch Thermal Management
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Solution Overview
Problem
Power electronic switching devices generate significant electrical losses, leading to waste heat that affects the functionality and service life of the components, particularly the middle partial power switches which are thermally influenced by surrounding switches.
Innovation Solution
A power electronic switching device with a substrate featuring a chessboard-like arrangement of partial power switches on non-conductive insulation layers, where each middle switch is physically spaced from outer switches, reducing thermal influence and improving heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If partial power switches are arranged in parallel rows to increase power handling capability, then the power handling capability is improved, but the thermal influence between adjacent switches increases leading to reduced service life
Solution Approach 1:
The patent transitions from a linear arrangement of switches to a two-dimensional chessboard pattern, where switches are distributed across both x and y dimensions. This spatial redistribution reduces thermal coupling between adjacent switches while maintaining parallel connection for power handling, effectively resolving the contradiction between power capability and thermal management.
Solution Approach 2:
The chessboard arrangement creates an asymmetric thermal distribution pattern where middle switches are surrounded by alternating DC and AC switches rather than identical switches. This asymmetry in thermal environment reduces the cumulative thermal influence on middle switches, improving their service life while maintaining the parallel power handling structure.
2Productivity
If multiple partial power switches are arranged in parallel to form current control valves, then the current control capability is improved, but the waste heat generation increases affecting functionality
Solution Approach 1:
The patent segments the parallel switch arrangement into alternating DC and AC switch rows in a chessboard pattern. This segmentation separates heat-generating switches of the same type, creating thermal zones that prevent heat accumulation and improve overall heat dissipation efficiency while maintaining the parallel current control capability.
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 chessboard-like arrangement reduces thermal impact on middle switches, enhancing the service life and functionality of the switching device by allowing better heat dissipation and reducing ambient temperature, thus improving overall performance.
Implementation Method 1
the thermal influence from the two outer partial power switches is at least significantly reduced
Implementation Method 2
allowing better heat dissipation and reducing ambient temperature
Data Source
AI summary
The invention relates to a power electronic switching device having a substrate, which has a non-conductive insulation layer on which at least one first conductor track 40 and at least one second conductor track 50 are applied. The first conductor track 40 is assigned an electrical DC voltage potential DC+ of the power electronic switching device and the one second conductor track 50 is assigned an electrical AC voltage potential AC of the power electronic switching device. At three first partial power switches are arranged on the first conductor track. At least three second partial power switches are arranged on the second conductor track. The at least three first partial power switches are connected electrically in parallel with each other to form a first parallel circuit and the at least three second partial power switches are electrically connected in parallel with each other to form a second parallel circuit. The at least three first partial power switches and the at least three second partial power switches are arranged on the substrate 30 in a chessboard-like pattern.