Dual Power Supply Circuit Switching With Reactor Inrush Suppression

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Solution Overview

Problem

Existing electrical power supply systems face issues with inrush currents that can damage electronic devices during failures in power supply, particularly in systems with multiple power generating devices.

Innovation Solution

Incorporating reactors in series with connection devices to suppress inrush currents by generating a counter-electromotive force, and using disconnection devices to isolate failed power generating devices, ensuring stable power distribution across multiple circuits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If connection devices are used to connect multiple electrical power supply circuits, then power distribution flexibility is improved, but inrush currents can damage electronic devices

Engineering Contradiction:

Improvepower distribution flexibilityVSAvoidinrush current damage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces reactors as intermediary components between connection devices and electrical power supply circuits. These reactors act as mediators that limit inrush currents while allowing normal power distribution operations, thus protecting electronic devices without compromising system flexibility

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent implements preliminary protective measures by pre-installing reactors and disconnection devices in the circuit configuration. When failures are detected, disconnection devices are activated to isolate affected circuits before inrush currents can cause damage, preventing harmful effects before they occur

Inventive Principle:

Principle #9Preliminary anti-action

2Reliability

If disconnection devices are used to isolate failed power generating devices, then system reliability is improved, but device complexity increases

Engineering Contradiction:

Improvesystem reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the electrical power supply system into independently controllable segments using disconnection devices. Each power supply circuit can be isolated and controlled separately, allowing failed segments to be disconnected without affecting the entire system, thereby improving reliability through modular segmentation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic control of circuit connections through controllers that automatically activate disconnection devices based on real-time system status. This dynamic adaptation allows the system to reconfigure itself in response to failures, maintaining reliability without requiring permanent complex hardware configurations

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If reactors are connected in series with connection devices, then inrush current suppression is improved, but power loss increases

Engineering Contradiction:

Improveinrush current suppressionVSAvoidpower loss

Core Design Contradiction:

Object-affected harmful factorsVSLoss of energy

Solution Approach 1:

The patent optimizes reactor parameters (inductance values, resistance characteristics) to achieve effective inrush current suppression while minimizing continuous power losses. By carefully selecting and adjusting these parameters, the system achieves protective functionality with acceptable energy efficiency

Inventive Principle:

Principle #35Parameter changes

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

Effectively protects electronic devices from inrush currents by controlling power flow and isolating failed generators, maintaining system stability and preventing damage.

Implementation Method 1

Inrush currents are suppressed by a counter-electromotive force of a reactor

Methodology Applied

Scientific EffectCounter-electromotive force: Electromagnetic Induction

Data Source

PatentUS20250309677A1Power supply system, moving object, and method of controlling power supply system

Publication Date: 2025.10.02 HONDA MOTOR CO LTD

AI summary

A electrical power supply system is equipped with a first electrical power supply circuit, a second electrical power supply circuit, a connection circuit including a connection device capable of connecting the first electrical power supply circuit and the second electrical power supply circuit to each other, a control device, and a disconnection device. The connection circuit also includes a reactor connected in series to the connection device. In a case that a failure has occurred in the supply of electrical power from a first electrical power generating device to the first electrical power supply circuit, the control device executes a connection control on the connection device in a state in which the first electrical power supply circuit and the connection circuit are disconnected from the first electrical power generating device by the disconnection device.