DC Bus Power Conversion Control for Fast Voltage Balancing

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing power conversion systems face hysteresis and slow response times due to reliance on software logic for energy distribution and control, leading to potential overvoltage and undervoltage issues.

Innovation Solution

A power conversion system utilizing a control unit that generates and compares loop control signals based on electrical parameters to manage energy flow and balance, eliminating the need for software logic and enabling rapid mode switching between constant current and constant voltage modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If software logic is used for energy distribution control, then control flexibility is improved, but response time increases and dynamic response speed decreases

Engineering Contradiction:

Improvecontrol flexibilityVSAvoidresponse time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent replaces software logic control with a hardware-based control circuit that directly compares voltage signals and generates control outputs. This substitution of mechanical/electrical control for software control eliminates processing delays and achieves rapid response while maintaining control flexibility through analog signal comparison and switching.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If software logic is used for energy distribution control, then control flexibility is improved, but system complexity increases

Engineering Contradiction:

Improvecontrol flexibilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces complex software logic with a simplified hardware control circuit consisting of voltage comparators and switching elements. This reduction from software-based to hardware-based control decreases system complexity while preserving control flexibility through direct electrical signal processing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Speed

If rapid mode switching is implemented, then dynamic response speed is improved, but control precision may deteriorate

Engineering Contradiction:

Improvedynamic response speedVSAvoidcontrol precision

Core Design Contradiction:

SpeedVSMeasurement precision

Solution Approach 1:

The patent implements a feedback mechanism where the control circuit continuously monitors voltage levels and adjusts control signals in real-time. This feedback ensures that rapid mode switching maintains precision by constantly comparing actual voltage with reference voltage and making corrective adjustments.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent uses hardware-based voltage comparison and switching that provides immediate response to voltage changes, ensuring both rapid switching and precise control through direct electrical signal processing without software intervention delays.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP4718657A1Power conversion system and power distribution method

Publication Date: 2026.04.01 XIAMEN AMPACK TECH LTD

Figure 1~2
Figure 3~4
Figure 5~6

AI summary

A power conversion system includes: a direct current bus (DC-BUS); a power conversion unit, electrically connected to the DC-BUS, where the power conversion unit is configured to be electrically connected to at least two of a direct current power source, a battery module, or an alternating current power source; and a control unit, electrically connected to the power conversion unit. The control unit is configured to perform the following operations: outputting either a first loop control signal or a second loop control signal to the power conversion unit; and/or, outputting either a third loop control signal or a fourth loop control signal to the power conversion unit; and/or, outputting either a fifth loop control signal or a sixth loop control signal to the power conversion unit.