Drive-Sense Power Supply Circuit for Ripple and Voltage Sag
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Solution Overview
Problem
Current power supply signal conditioning systems face challenges in effectively managing and monitoring power signals due to variations and deleterious effects such as voltage sag, harmonic glitches, and ripple, which affect the quality of the power supplied to loads.
Innovation Solution
The implementation of a drive-sense circuit (DSC) that simultaneously drives and senses power signals, using a power source circuit and a power signal change detection circuit to detect changes and generate representative signals, allowing for adaptive processing and injection of signals to counteract these effects, thereby conditioning the power supply signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional separate drive and sense circuits are used, then device complexity is reduced, but power signal quality deteriorates due to voltage sag, harmonic glitches, and ripple
Solution Approach 1:
The patent combines the drive circuit and sense circuit into a single integrated circuit that simultaneously performs both functions. The drive circuit generates the power signal while the sense circuit monitors the same signal, allowing real-time detection and correction of power quality issues without requiring separate independent circuits.
Solution Approach 2:
The sense circuit continuously monitors the power signal characteristics (voltage, current, frequency) and feeds this information back to the drive circuit. The drive circuit uses this feedback to dynamically adjust its output, correcting voltage sag, harmonic distortion, and ripple in real-time to maintain power signal quality.
2Reliability
If adaptive signal processing is implemented, then power signal quality is improved, but processing time increases
Solution Approach 1:
The drive-sense circuit operates continuously without interruption, with the sense circuit constantly monitoring the power signal and the drive circuit continuously adjusting its output. This eliminates discrete processing cycles and associated delays, maintaining real-time power signal correction through unbroken feedback loops.
Data Source
AI summary
A power supply signal conditioning system includes a power supply, one or more loads, and a drive-sense circuit (DSC). The power supply is operably coupled to one or more loads. When enabled, the power supply configured to output a power supply signal having a DC (direct current) voltage component and a ripple voltage component that is based on conversion of an AC (alternating current) signal in accordance with generating the power supply signal. The DSC is operably coupled to the power supply. When enabled, the DSC is configured simultaneously to sense the power supply signal and, based on sensing of the power supply signal, adaptively to process the power supply signal in accordance with reducing or eliminating the ripple voltage component of the power supply signal to generate a conditioned power supply signal to service the one or more loads.