Oscillation Mitigation Circuit for Immersion-Cooled Load Boards
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Solution Overview
Problem
Existing systems for supplying electric power to load circuit boards in immersion-cooled systems experience oscillations in voltage and current, which interfere with the intended function of the boards and need to be mitigated.
Innovation Solution
A circuit comprising an inductor and capacitor, optionally with fuses, mounted on an oscillation mitigation board, is coupled between the power supply and load circuit boards to mitigate these oscillations, using a configuration that allows for adjustable inductance and capacitance values and includes a ground reference trace on the board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a DC voltage converter supplies power to multiple load circuit boards through busbars and wire harnesses, then power delivery capability is improved, but voltage and current oscillations occur that interfere with board function
Solution Approach 1:
An oscillation mitigation board is introduced as an intermediary component between the power distribution system (busbars and wire harnesses) and the load circuit boards. This board contains circuitry that actively detects and counteracts voltage and current oscillations, thereby stabilizing the power delivery without compromising the high power capability of the original distribution system.
Solution Approach 2:
The oscillation mitigation board implements feedback control by monitoring the voltage and current on the power lines and dynamically adjusting its output to counteract detected oscillations. This closed-loop approach ensures that power delivery remains stable while maintaining the ability to supply high current to multiple load boards.
2Adaptability or versatility
If wire harnesses connect busbars to load circuit boards, then system connectivity is improved, but oscillations are transmitted along the wire harnesses to the boards
Solution Approach 1:
The oscillation mitigation board serves as a mediator inserted into the connection between the wire harnesses and the load circuit boards. It filters and stabilizes the electrical signals before they reach the boards, preventing oscillations transmitted through the wire harnesses from interfering with board operation while preserving full connectivity.
3Reliability
If inductors and capacitors are added to mitigate oscillations, then voltage and current stability is improved, but device complexity increases
Solution Approach 1:
The oscillation mitigation functionality is merged into a single integrated board that combines inductors, capacitors, and control circuitry in one compact unit. This consolidation reduces the overall system complexity compared to distributing separate mitigation components throughout the power distribution network, while still achieving effective oscillation reduction.
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
The circuit significantly reduces voltage and current oscillations by at least a factor of 10, protecting the load circuit boards from anomalous behavior and ensuring stable power delivery.
Implementation Method 1
The inductor may comprise a plurality of inductors coupled in series. The inductor may be coupled between the busbar and a node.
Implementation Method 2
The capacitor may comprise a plurality of capacitors coupled in parallel. The capacitor may be coupled between the node and a ground reference coupled to a ground terminal of the DC voltage converter.
Data Source
AI summary
Oscillation mitigation circuits are implemented in a system for supplying electric power to load circuit boards, for example, load circuit boards entirely immersed into a bath of dielectric heat transfer fluid. The oscillation mitigation circuits can be used to protect the load circuit boards, including the connectors mounted on these load circuit boards, from an anomalous behavior of the electric power. The oscillation mitigation circuits are coupled between wire bundles forming a portion of the electric power supply and the connectors mounted on the load circuit boards.