Switchboard Cabinet With Insulated Clamping Device
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Solution Overview
Problem
Existing switch cabinets with power converter devices face challenges in quick and easy replacement of faulty converter devices due to complex electrical connections.
Innovation Solution
A switch cabinet design featuring a cabinet frame with converter devices and an electrical connecting clamping device, utilizing non-conductive insulation elements and pressure-generating screws for secure yet isolative connections, allowing for easy replacement of converter devices by keeping the clamping element mechanically connected to the cabinet frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If converter devices are electrically connected to a common intermediate circuit capacitor via direct voltage potential connection elements, then reliable electrical connection is achieved, but the complexity of electrical connections increases and replacement time increases
Solution Approach 1:
The patent introduces a connection clamping device as an intermediary component between the converter devices and the common intermediate circuit capacitor. This clamping device includes clamping elements that can be quickly connected and disconnected, serving as a mediator that simplifies the electrical connection process while maintaining reliability through proper contact establishment.
Solution Approach 2:
The electrical connection system is segmented into modular components: converter devices with their own connection elements, a separate clamping device with multiple clamping elements, and the common intermediate circuit capacitor. This segmentation allows individual converter devices to be replaced without affecting the entire electrical system, reducing replacement time and complexity.
2Reliability
If converter devices are electrically connected through multiple DC voltage potential connection elements, then reliable electrical connection is achieved, but replacement time increases due to complex disconnection processes
Solution Approach 1:
The connection clamping device is pre-configured with multiple clamping elements positioned to simultaneously contact multiple DC voltage potential connection elements. This preliminary arrangement allows for quick connection and disconnection operations, as the clamping elements are already in place and only need to be engaged or disengaged as a unit, significantly reducing replacement time.
Solution Approach 2:
Multiple clamping elements are combined into a single integrated clamping device that can be operated as one unit. This merging allows all electrical connections to be made or broken simultaneously through a single operation, rather than requiring separate operations for each connection element, thus reducing replacement time while maintaining reliable electrical connections.
3Reliability
If clamping elements are electrically conductive for good electrical contact, then electrical connection quality improves, but electrical insulation between different voltage potentials becomes difficult to maintain
Solution Approach 1:
The clamping device applies local quality by making different parts electrically conductive only where needed for good contact (the clamping surfaces contacting the DC voltage potential connection elements) while maintaining electrical insulation in other areas (between different voltage potentials through proper positioning and non-conductive support structures). This allows high-quality electrical contact locally while maintaining necessary insulation elsewhere.
Data Source
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AI summary
The invention relates to a control cabinet with a cabinet frame and with a first and a second power converter unit, and with an electrical connection terminal unit, wherein the first power converter unit has a first DC positive potential connection element and a first DC negative potential connection element, wherein the second power converter unit has a second DC positive potential connection element and a second DC negative potential connection element, wherein the connection terminal unit has an electrically conductive first terminal element and an electrically conductive second terminal element arranged electrically insulated from the first terminal element, and a pressure generating device configured to generate a pressure that pushes the second terminal element towards the first terminal element.wherein the first clamping element is electrically insulated from the cabinet frame and mechanically connected to the cabinet frame via an electrically non-conductive insulating body. The invention provides a control cabinet with power converter devices in which the power converter devices can be replaced quickly and easily.