Converter Power Circuit Stabilization for Input Filter Oscillations
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Solution Overview
Problem
Hot-pluggable DC-DC converters face system-level limitations that result in large, potentially damaging voltage and current oscillations due to instability, which conventional power supplies fail to mitigate effectively.
Innovation Solution
A system and method that employs a converter power circuit with a controller to generate positive resistance and counteract transient currents, enabling the circuit only during the charging of the load capacitance and disabling it once the transient is complete, thereby stabilizing input filter oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the converter is made hot-pluggable with limited input capacitance, then the converter can be safely connected to live power supplies, but voltage and current oscillations occur due to instability
Solution Approach 1:
The patent applies dynamics by making the converter circuit temporarily active only during the transient charging period of the input capacitor. The controller dynamically enables the converter to generate positive resistance when needed (during voltage application to charged capacitor) and disables it when the transient completes, allowing the system to adapt its impedance characteristics based on the operational state rather than maintaining a fixed configuration
Solution Approach 2:
The patent changes the input impedance parameter from negative (unstable) to positive (stable) by activating the converter circuit during transient conditions. The controller monitors the transient state and adjusts the converter's operational status accordingly, effectively changing the electrical parameter of input impedance to counteract oscillations and stabilize the input filter during hot-plug events
2Stability of the object's composition
If the converter circuit remains continuously active to stabilize oscillations, then input filter stability is improved, but energy is wasted during periods when transients have completed
Solution Approach 1:
The patent implements periodic action by enabling the converter circuit only during specific transient periods when oscillations occur, rather than maintaining continuous operation. The controller periodically monitors the transient status and activates the converter only when needed for stabilization, then disables it when the transient completes, creating an on-demand operational pattern that eliminates energy waste during stable periods
Solution Approach 2:
The system performs self-service through automatic transient detection and converter control. The controller autonomously monitors the transient condition and manages the converter's operational state without external intervention, enabling the circuit to stabilize itself during oscillations and conserve energy during normal operation, effectively making the system self-regulating
Data Source
AI summary
A system and method for controlling power supply input filter oscillations is provided. The method includes utilizing a converter power circuit to generate a positive input resistance to counteract input filter oscillations, which are generated in response to normal converter negative input impedance and current-mode control operation. A controller controls the converter power circuit to generate the positive resistance utilizing a first input corresponding to the voltage applied to the converter input. A second input disables the converter power circuit based on completion of output capacitor charge, the first and second inputs being different.