Power Module Substrate Bilateral Symmetry Switching Uniformity
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Solution Overview
Problem
Power modules with high current interruption susceptibility and switching current non-uniformity lead to uneven power consumption and potential device damage, making it difficult to control individual switching devices efficiently.
Innovation Solution
A substrate design with bilaterally symmetric areas for mounting input terminals, devices, and control pins, along with a second substrate with insulation and conductive layers, reduces inductance variation and improves switching uniformity, allowing for efficient power distribution and reduced power losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If unit switching devices are connected in parallel to increase power capacity, then the power module can handle higher currents, but switching current non-uniformity occurs causing power consumption to concentrate in one device leading to device damage
Solution Approach 1:
The patent applies asymmetry by intentionally introducing different resistance values in the control signal paths of parallel switching devices. Specifically, different resistance values are set in series with the gate electrodes of each switching device, creating asymmetric control characteristics that compensate for inherent differences in device parameters. This asymmetric design ensures uniform switching current distribution across all parallel devices, preventing power consumption concentration and improving reliability while maintaining high power capacity.
2Ease of manufacture
If general parallel operational devices are connected to the same electrical terminal, then connection is simplified, but it becomes difficult to individually control each device
Solution Approach 1:
The patent applies segmentation by providing separate control signal input terminals for each switching device rather than a common control terminal. Each switching device has its own dedicated control terminal that receives control signals through individually configured resistance elements. This segmented control approach enables independent adjustment and control of each device's switching characteristics while maintaining simplified electrical connections through the modular substrate design.
3Ease of operation
If a layout is designed to individually control parallel devices, then individual device control becomes possible, but the layout becomes inefficient in economic and technical feasibility
Solution Approach 1:
The patent applies universality by using a standardized substrate design that can accommodate multiple switching devices with individual control capabilities. The substrate incorporates universal mounting areas, common electrical connection patterns, and modular resistance element configurations that can be replicated for different numbers of parallel devices. This universal design enables individual device control while maintaining manufacturing efficiency and reducing layout complexity through standardized, scalable architecture.
Data Source
AI summary
Provided are a substrate for a power module having a uniform parallel switching characteristic and a power module including the same. The substrate for the power module includes a plurality of areas on which input terminals are mounted, an area on which an output terminal is mounted, a plurality of areas on which devices are mounted, and an area on which a plurality of control pins are mounted. The plurality of areas on which the devices are mounted are bilaterally symmetric about the area on which the plurality of control pins are mounted. The plurality of areas on which the input terminals are mounted, respectively, are provided into three areas spaced apart from each other and bilaterally symmetric to each other. The plurality of areas on which the device are mounted are bilaterally symmetric about the area on which the control pins are mounted.