Remote Sense Power Supply Without Wires for Noise-Free Voltage Regulation

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Solution Overview

Problem

Existing remote sense systems in power supplies suffer from noise issues and ground loops due to the need for additional sense wires, which can lead to noisy outputs and damage to the power supply, especially in high-current applications.

Innovation Solution

A digitally controlled power supply system that eliminates the need for sense wires by using wireless remote sensing, where the controller measures voltage drops across shorted leads to calculate wire resistance and adjust output voltage accordingly, eliminating noise and ground loop risks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If additional sense wires are used for remote sensing, then voltage regulation accuracy is improved, but noise and ground loop issues worsen

Engineering Contradiction:

Improvevoltage regulation accuracyVSAvoidnoise and ground loops

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the voltage measurement function from physical sense wires and implements it through wireless communication. The sense wires are completely removed from the system, and voltage at the load is measured and transmitted wirelessly to the power supply controller, eliminating the source of noise and ground loop problems while maintaining voltage regulation accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

2Manufacturing precision

If sense wires are used for remote sensing, then voltage drop compensation is improved, but system complexity and cost worsen

Engineering Contradiction:

Improvevoltage drop compensationVSAvoidsystem complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical/wired sensing system with a wireless electronic system. Instead of using physical sense wires to carry voltage measurement signals, the system uses wireless communication (such as radio frequency communication) to transmit voltage information from the load to the power supply, simplifying the physical connection requirements while maintaining voltage drop compensation capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This solution provides accurate and fast voltage regulation at the load without the risks of noise or ground loops, allowing for real-time control and reducing the complexity and cost of the power supply system.

Implementation Method 1

the controller measures a voltage drop across the one or more leads shorted at the distal end

Methodology Applied

Scientific EffectVoltage drop: Electrical Resistance

Data Source

PatentEP3379368B1Systems, methods, and devices for remote sense without wires

Publication Date: 2023.11.08 VERSATILE POWER

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AI summary

A system for controlling power output of a power supply incudes power conversion circuitry, output terminals, and a controller. The controller controls the power conversion circuitry to provide a known current to one or more leads, wherein the one or more leads are shorted at the distal end. The controller measures a voltage drop across the one or more leads shorted at the distal end. The controller stores a parameter determined based on the voltage drop, such as a resistance of the one or more leads. The controller controls the power conversion circuitry to provide a target voltage to the load based on the stored parameter when the one or more leads are not shorted at the load.