Power Supply Device Voltage Stability Anomaly Detection

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Solution Overview

Problem

Existing power supply systems fail to maintain stable voltage across multiple loads in series when anomalies occur, leading to instability in normal loads due to limited impedance adjustment range.

Innovation Solution

A power supply device with a detection circuit to identify voltage anomalies and an adjustment circuit that decreases the output voltage based on the number of abnormal loads, ensuring stable voltage is maintained across normal loads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If impedance adjustment is used to compensate for voltage anomalies in series loads, then voltage stability can be improved for normal loads, but the adjustment range is limited and cannot handle severe anomalies

Engineering Contradiction:

Improvevoltage stabilityVSAvoidimpedance adjustment range

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The invention changes the output voltage parameter of the power supply device based on the number of abnormal loads detected. When anomalies are detected in series-connected loads, the control device adjusts the output voltage to compensate for the voltage distribution imbalance, thereby maintaining voltage stability within the adjustable range even when impedance adjustment alone is insufficient

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention implements a feedback mechanism where the control device continuously monitors the voltage of each load in series and detects anomalies. Based on this feedback information, the control device dynamically adjusts the output voltage to maintain proper voltage distribution across normal loads, resolving the contradiction between limited impedance adjustment range and voltage stability requirements

Inventive Principle:

Principle #23Feedback

2Ease of operation

If the power supply device maintains fixed output voltage, then the system is simple to operate, but voltage instability occurs when load anomalies are present

Engineering Contradiction:

Improvefixed voltage operationVSAvoidvoltage stability under anomaly

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The power supply device performs self-diagnosis and self-adjustment through the control device that automatically detects load anomalies and adjusts output voltage accordingly. This self-service mechanism maintains ease of operation while improving reliability, as the system automatically compensates for anomalies without requiring manual intervention or complex user operations

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The invention transitions from a static fixed voltage operation to a dynamic voltage adjustment mode. The control device dynamically modifies the output voltage based on real-time load conditions, allowing the system to maintain simplicity in normal operation while automatically adapting when anomalies occur, thus resolving the contradiction between operational simplicity and voltage stability

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11237582B2Power supply device and electronic apparatus to supply stable voltage to normal device

Publication Date: 2022.02.01 FUJITSU LTD

AI summary

A power supply device includes a power supply circuit configured to generate a direct current output voltage to be applied to both ends of a plurality of loads serially coupled, a detection circuit configured to detect an anomaly of a load voltage applied to each of the plurality of loads, and an adjustment circuit configured to decrease the output voltage in accordance with a number of abnormal loads where the anomaly is detected among the plurality of loads.