Inverter Terminal Insulation Layout Against Residual Voltage Exposure
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Solution Overview
Problem
Existing inverter designs in motor vehicles do not provide sufficient electrical insulation for connection terminals, posing a risk of electrocution to operators when the housing is opened, especially due to residual voltage that may remain after disconnecting the power supply.
Innovation Solution
The implementation of electrical insulation means between the connection terminals and the cover of the inverter housing, which is secured by a fixing member and fastening elements, ensures that the connection terminals are not directly exposed when the cover is removed, thereby protecting the operator from electrocution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connection terminals are directly accessible when the cover is removed, then the ease of operation for connecting electrical conductors is improved, but the operator is exposed to residual voltage and at risk of electrocution
Solution Approach 1:
An electrical insulation means is introduced as an intermediary element between the connection terminals and the cover. This insulating barrier prevents direct electrical contact while allowing the connection terminals to remain accessible for electrical conductor connection, thus resolving the contradiction between operational ease and safety.
2Reliability
If electrical insulation means is added between the cover and connection terminals, then protection against electrocution is improved, but the device complexity increases
Solution Approach 1:
The electrical insulation means is implemented as a thin film or sheet that can be easily positioned between the cover and connection terminals. This approach provides effective electrical insulation without adding significant structural complexity, maintaining simplicity while improving safety.
3Reliability
If the electrical insulation means is secured with a fixing member, then the reliability of insulation positioning is improved, but the ease of assembly and disassembly deteriorates
Solution Approach 1:
The fixing member is integrated with either the cover or the electrical insulation means, merging two components into one. This integration ensures reliable positioning of the insulation while simplifying the assembly process, as the fixed insulation becomes part of the assembly unit rather than a separate component requiring independent installation.
Data Source
AI summary
An inverter for a motor vehicle includes at least one lid and a main body delimiting a volume within which at least one printed circuit board is housed, the volume being closed by the lid. The inverter includes a housing which projects from the lid, the housing delimiting a space in which are housed a first connection terminal and a second connection terminal each configured to be connected to an electrical conductor intended to electrically connect an electrical energy storage means to the inverter. The housing includes a cover closing the housing, the housing having electrical insulation disposed between the cover and said connection terminals.