Removable Unit Power Multiplexer for Additive Manufacturing
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Solution Overview
Problem
Additive manufacturing systems face risks of damage during the connection and disconnection of removable units due to high voltage power supply issues, such as 'hot plugging' and 'hot unplugging', which can cause harm to components and connectors.
Innovation Solution
A dual power coupling system is implemented, where a low voltage power supply is used initially to power diagnostic systems before switching to a high voltage supply, and a power multiplexer is used to manage the transition, ensuring safe startup and shutdown procedures and reducing the risk of component damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a high voltage power supply is connected during unit connection or disconnection, then the system can operate with full power, but components and connectors may be damaged due to hot plugging
Solution Approach 1:
The patent applies preliminary action by implementing a staggered startup procedure where the low voltage power supply is connected and activated before the high voltage power supply during unit connection. This ensures that sensitive electronic components are already powered and protected before exposure to high voltage, preventing hot plugging damage. Similarly, during disconnection, the high voltage supply is disconnected before the low voltage supply, maintaining component safety throughout the process.
2Reliability
If a dual power coupling system with staggered startup is implemented, then component damage is prevented, but the power supply procedure becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the power supply system into two distinct power coupling paths: a first power coupling for low voltage supply and a second power coupling for high voltage supply. This segmentation allows independent control and timing of each power supply connection, enabling the staggered startup procedure while maintaining clear separation of functions. The controller manages these segmented power paths through coordinated switching, reducing overall system complexity despite the dual power supply architecture.
Data Source
AI summary
Certain examples described herein relate to a removable unit of an additive manufacturing system. The removable unit is connectable to a base unit. When connected and operational, the base unit supplies a first voltage to the removable unit via a first power coupling. The removable unit has a power supply unit that converts the first voltage to a second voltage. The second voltage may power a number of low voltage components. The removable unit also has a power multiplexer. When the first voltage is unavailable the removable unit switches the power multiplexer to use a second voltage that is supplied from the base unit via a second power coupling.