Semiconductor Power Module Terminal Segmentation for Noise Suppression
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Solution Overview
Problem
Existing semiconductor power modules face challenges in reducing size while minimizing noise interference from main terminals to control terminals, which can lead to malfunctions due to magnetic flux induced by current variations, especially in compact installations like electric vehicles and railroad vehicles.
Innovation Solution
The semiconductor power module design includes main terminals with bifurcated parts extending in a common direction, with control terminals such as gate and emitter signal terminals laminated and sandwiched between these parts, orthogonal to the base, to cancel out magnetic fluxes and reduce noise influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If main terminals and control terminals are placed close to each other for module size reduction, then module size is reduced, but noise interference from main terminals to control terminals increases due to magnetic flux generated by current variations
Solution Approach 1:
The main terminal is divided into two separate parts (first main terminal part and second main terminal part) that are extended in a common direction. The control terminal is positioned between these two parts, creating a segmented arrangement that reduces magnetic flux interference while maintaining compact module size.
Solution Approach 2:
The control terminal is specifically positioned in the region between the two main terminal parts where magnetic flux interference is minimized. This local optimization ensures that the control terminal is located in a low-noise zone while the overall module maintains a compact structure.
2Object-affected harmful factors
If control terminal is placed far from main terminal to reduce noise influence, then noise interference is reduced, but module size increases
Solution Approach 1:
Instead of placing the control terminal far from the main terminal in the same plane, the invention utilizes the spatial dimension by positioning the control terminal between the two main terminal parts that are extended in a common direction. This three-dimensional arrangement reduces noise interference without increasing the overall module footprint.
Solution Approach 2:
By segmenting the main terminal into two parts and positioning the control terminal between them, the invention achieves noise reduction within a compact space, avoiding the need to increase module size to separate the terminals.
3Ease of manufacture
If auxiliary terminals are placed at the outer edge of the module far from external lead terminal, then assembly is simplified, but module size increases and magnetic flux influence on auxiliary terminal increases
Solution Approach 1:
The main terminal is segmented into two parts extended in a common direction, with the auxiliary terminal positioned between them. This segmented arrangement allows the auxiliary terminal to be placed in a compact central region rather than at the outer edge, reducing module size while maintaining assembly simplicity.
Solution Approach 2:
The auxiliary terminal is specifically positioned in the region between the two main terminal parts where magnetic flux interference is minimized. This local optimization reduces noise influence on the auxiliary terminal while maintaining ease of assembly and reducing overall module size.
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 enables dense packaging and size reduction while effectively suppressing noise interference from main terminals to control terminals, preventing malfunctions during operation.
Implementation Method 1
The emitter signal terminal and the gate signal terminal have a laminated portion formed by laminating their respective parts. The laminated portion is so placed as to be sandwiched between one and the other of the two parts of the any one of the positive electrode terminal, negative electrode terminal, and alternating current terminal.
Data Source
AI summary
A semiconductor power module with which it is possible to suppress the influence of noise given from a main terminal to a control terminal is provided. At least any one of main terminals (positive electrode terminal, negative electrode terminal, alternating current terminal) is so configured that the main terminal includes two parts extended in a common direction. The two parts are, for example, formed of a single component having such as a shape that the component is bifurcated from the outside toward the inside of the semiconductor power module or two different components. The two parts are so structured that the parts are extended in a common direction. Control terminals (gate signal terminal and emitter signal terminal) are so arranged that a laminated portion of the control terminals is sandwiched between one and the other of the two parts to configure the semiconductor power module.