Converter Control Device Gain Switching for Phase Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing converter control devices face challenges in achieving optimal feedback control when changing the number of drive phases in response to varying electric power loads, leading to suboptimal performance in voltage conversion efficiency.
Innovation Solution
A converter control device with a control unit that provides feedback control by switching control gains based on pre-stored data relating to the number of drive phases, ensuring suitable feedback control is maintained even when the number of drive phases changes in response to electric power fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the number of drive phases is changed in response to electric power load variations, then voltage conversion efficiency is improved, but feedback control performance deteriorates due to lack of phase-adapted control gains
Solution Approach 1:
The control device dynamically switches between different control gain sets based on the current number of drive phases. The control gain switching unit selects appropriate control gains from multiple pre-stored sets corresponding to different phase configurations (single-phase, two-phase, three-phase), enabling the feedback control to adapt its characteristics to match the current operational state and maintain optimal performance across all operating conditions
Solution Approach 2:
The invention changes the control parameters (control gains) according to the number of drive phases. By storing multiple sets of control gains corresponding to different phase numbers and switching between them based on the current operational state, the system optimizes feedback control performance for each specific phase configuration while maintaining energy conversion efficiency
2Productivity
If multiple converters are connected in parallel to handle load fluctuations, then power supply capacity is improved, but device complexity increases
Solution Approach 1:
The converter system is divided into multiple independent converter units that can operate in parallel. Each converter can be independently controlled and switched, allowing the system to activate only the necessary number of converters based on load requirements. This segmentation enables flexible capacity adjustment while maintaining manageable complexity through modular architecture
Solution Approach 2:
The control device is designed to universally handle multiple operational modes by storing and switching between control gain sets for different numbers of drive phases. This multi-functionality allows the same control device to effectively manage various converter configurations (1-phase, 2-phase, 3-phase) without requiring separate control systems for each configuration
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 enables reliable and effective feedback control suitable for the number of drive phases, improving voltage conversion efficiency by adapting control gains to match changing load conditions, thereby optimizing energy transfer between power supplies.
Implementation Method 1
a plurality of converters each having a plurality of switching elements and a reactor and performing voltage conversion bi-directionally
Data Source
AI summary
A converter device which is configured by connecting three converter circuits in parallel is provided between a secondary battery serving as a first power supply and a fuel cell serving as a second power supply. A control unit includes a PID control module which controls the converter device by PID control, for executing desired voltage conversion; a module for modifying the number of drive phases which changes the number of drive phases of the converter device in response to an electric power passing through the converter device; and a gain switching module which switches feedback gains in the PID control when the number of drive phases is changed.