Power Semiconductor Module Track Layout for Accurate Current Sensing
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Solution Overview
Problem
Existing power semiconductor modules lack an efficient and compact design for integrating a current sensor to accurately measure high current flows.
Innovation Solution
A power semiconductor module design featuring a narrow region in the conducting track with a reduced lateral extension, allowing for a higher current density and magnetic field strength, enabling precise mounting of a current sensor above this region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional conducting track design is used, then the module structure is simple, but the current sensor cannot achieve accurate measurement of high current flows
Solution Approach 1:
The conducting track is designed with a narrow region that has different geometric properties (smaller lateral extension) compared to other regions. This local variation concentrates the current flow in a specific area, enhancing the magnetic field strength at that location to improve current sensor measurement accuracy without requiring complete redesign of the entire conducting track structure.
2Measurement precision
If the conducting track lateral extension is reduced to increase current density, then the magnetic field strength increases for better sensor detection, but the current flow path area decreases
Solution Approach 1:
The conducting track is segmented into different regions: a narrow region with smaller lateral extension for current concentration and magnetic field generation, and wider regions for current distribution and connection. This segmentation allows the narrow region to provide sufficient magnetic field strength for accurate sensor detection while the overall track maintains adequate area for current flow through its other regions.
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
Ensures complete measurement of the entire current flow with increased accuracy and compactness by concentrating current at a narrow region for enhanced magnetic field detection.
Implementation Method 1
The measurement principle of the current sensor is typically based on magnetic field measurements. The narrow region provides for an increased current density and thus for a higher field strength of a magnetic field at the current sensor.
Data Source
AI summary
A power semiconductor module including a substrate, a terminal, and a conducting track. The conducting track includes a narrow region between the terminal and a power semiconductor in order to provide for an easy implementation of an electric current sensor.