Parallel Generator Linkage Box Synchronization

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Solution Overview

Problem

Portable engine-driven generators produce electricity at inconsistent voltage and frequency, leading to potential damage when connected in parallel due to unsynchronized phases and amplitudes, which existing technologies have not adequately addressed.

Innovation Solution

A synchronization method and apparatus using communication cables to determine timing differences between waveforms, designating a master generator and slave generators, and adjusting the slave generators' output to match the master's signal, ensuring synchronized operation through software modules and control modules in each generator.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If multiple portable generators are connected in parallel to increase power output, then the available power is improved, but the risk of component damage increases due to unsynchronized phases and amplitudes

Engineering Contradiction:

Improvepower outputVSAvoidcomponent safety

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The patent implements automatic synchronization through feedback mechanisms where each generator's control module continuously monitors its own output parameters (voltage, frequency, phase) and adjusts them based on signals from other generators. This closed-loop control ensures that generators automatically synchronize their phases and amplitudes, allowing parallel connection to increase power output without compromising component safety from unsynchronized operation

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent introduces synchronization control modules as intermediary devices that mediate between multiple generators. These control modules communicate generator status and output parameters, coordinating the generators' operation to maintain synchronization. This intermediary layer enables safe parallel operation by managing the interactions between generators, preventing the harmful effects of unsynchronized connection while preserving the power output benefits

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If manual synchronization methods are used to align generator phases, then component safety is improved, but the operational complexity increases

Engineering Contradiction:

Improvephase synchronizationVSAvoidsynchronization operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent implements self-service synchronization where each generator's control module autonomously performs phase and amplitude alignment without requiring manual intervention. The system automatically detects phase differences and adjusts generator parameters to achieve synchronization, eliminating the need for operators to manually coordinate multiple generators while maintaining reliable phase alignment

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical synchronization procedures with electronic control systems. Instead of requiring operators to physically adjust generators based on observational methods, the system uses electronic communication between control modules to automatically sense phase relationships and electronically adjust generator outputs, substituting complex manual operations with automated electronic control

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If automatic synchronization systems are implemented to maintain phase alignment, then component safety is improved, but the device complexity increases

Engineering Contradiction:

Improvephase synchronizationVSAvoidsynchronization system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent integrates multiple functions into the generators' existing control modules, which simultaneously perform power generation control, parameter monitoring, and synchronization coordination. By making the control modules multi-functional rather than adding separate dedicated synchronization devices, the system achieves reliable automatic phase alignment while minimizing the increase in overall device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Productivity

If slave generators are configured to match the master generator's output parameters, then load sharing efficiency is improved, but the system asymmetry increases

Engineering Contradiction:

Improveload sharing efficiencyVSAvoidsystem configuration

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent deliberately implements an asymmetric master-slave configuration where one generator is designated as the master and others as slaves. The master generator sets the reference parameters (voltage, frequency, phase), and slave generators adjust to match these parameters. This asymmetric arrangement simplifies the control logic and enables efficient load sharing, as slaves automatically follow the master's output characteristics without requiring complex coordination between all generators

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS9190848B2Parallel linkage for generators

Publication Date: 2015.11.17 CHAMPION POWER EQUIP

AI summary

Three or more portable generators are linked for synchronized operation. Power cables link each generator to a linkage box which connects the power in parallel and connects an outlet thereto. Communication cables link a software module in each generator with the linkage box. The modules vary the generator operation to generate a voltage amplitude and phase matching that of the first generator that is connected to the box that begins power generation, so that all generators share the load equally until their power output limits are reached.