Gate Driving Apparatus Insulation Cover Fixing
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Solution Overview
Problem
Existing gate wiring structures for high-voltage power modules are costly due to complex insulation requirements and lack a mechanism to securely fix the gate driving circuit substrate, making them prone to malfunctions from vibrations or impacts.
Innovation Solution
A gate driving apparatus that covers and fixes the gate-driving-circuit substrate with an insulation cover, mechanically connecting it to a cooler using a fixing member, ensuring insulation and protection from vibrations and impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a laminated wiring conductor plate with insulation sheet is used to ensure insulation, then insulation properties are improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the insulation function from the complex laminated wiring structure and implements it through a dedicated insulation cover that envelops the gate driving circuit substrate. This separates the insulation requirement from the wiring conductor plate design, allowing for a simpler overall structure while maintaining reliable insulation between high-voltage and control circuits.
Solution Approach 2:
The patent introduces an insulation cover as an intermediary component between the gate driving circuit substrate and the high-voltage main circuit. This mediator provides the necessary insulation protection without requiring complex laminated wiring structures, thereby reducing device complexity while ensuring insulation reliability.
2Device complexity
If no fixing structure is provided for the gate driving circuit substrate, then device complexity is reduced, but reliability deteriorates due to vibrations and impacts
Solution Approach 1:
The patent merges the fixing function with the insulation cover by integrating a fixing member into the cover structure. The insulation cover is fixed to the heat sink using this fixing member, which simultaneously secures the gate driving circuit substrate in place. This combination eliminates the need for separate fixing structures while providing reliable resistance to vibrations and impacts.
3Reliability
If a complex insulation structure is used, then insulation properties are improved, but manufacturing cost increases
Solution Approach 1:
The patent employs a simple insulation cover made from cost-effective insulating material rather than expensive complex laminated wiring structures. This approach prioritizes functional insulation over structural complexity, significantly reducing manufacturing costs while maintaining adequate insulation properties for the application.
Solution Approach 2:
The patent extracts the insulation function from expensive complex wiring structures and implements it through a simple, dedicated insulation cover. This separation allows for the use of cheaper insulating materials and simpler manufacturing processes while still achieving the required insulation performance.
Data Source
AI summary
Two insulation covers that can be vertically separated clamp a gate-driving-circuit substrate so as to form a gate driving apparatus. The gate driving apparatus is fixed to a cooler by fixing screws inserted through a pair of insertion bores in the two insulation covers that are arranged in a horizontal direction. A gate control terminal and a ground control terminal provided on the gate-driving-circuit substrate are screwed and fixed to, and thus electrically and mechanically connected to, a corresponding gate control terminal and a corresponding ground control terminal of a power module attached to the cooler. This allows the gate-driving-circuit substrate to be covered with the insulation covers for insulation protection and to be fixed to the cooler using a fixing member such as a screw.