Frequency Converter Control System Dynamic Reconfiguration
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Solution Overview
Problem
Frequency converters lack the ability to adjust their functional scope post-purchase, forcing users to either overdimension or purchase new units when requirements change, leading to inefficiencies and increased manufacturing diversity for manufacturers.
Innovation Solution
An operating method for frequency converters where the electronic control system determines nominal current values and control signals only within a permissible extent of use, which can be adjusted or expanded, allowing for dynamic reconfiguration and customization based on user needs, including transitioning to a basic operation mode when the extent of use reaches zero.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the functional scope of frequency converters is fixed at acquisition, then manufacturing complexity is reduced, but adaptability to changing user requirements deteriorates
Solution Approach 1:
The patent implements dynamic reconfiguration of the functional scope by introducing a reconfiguration module that can modify the control program at runtime. The functional scope is no longer fixed but can be dynamically adjusted by enabling or disabling specific determination methods based on user requirements, thereby resolving the contradiction between manufacturing simplicity and adaptability.
Solution Approach 2:
The patent changes the parameter of functional scope from a fixed state to a variable state. By using enable codes and reconfiguration modules, the system can switch between different determination methods and functional configurations without hardware changes, allowing the same hardware platform to serve multiple functions while maintaining manufacturing efficiency.
2Adaptability or versatility
If users acquire overdimensioned frequency converters to ensure future expansion, then adaptability is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the frequency converter universally applicable by enabling it to perform multiple functions through software reconfiguration. A single frequency converter can be adapted to different applications and functional requirements by loading different control programs and enabling different determination methods, eliminating the need for users to purchase overdimensioned or multiple specialized units.
3Adaptability or versatility
If the electronic control system always determines nominal current values according to all available determination methods, then functionality is maximized, but device complexity and processing overhead increase
Solution Approach 1:
The patent segments the control program into multiple independent determination methods, each handling specific functions. The reconfiguration module selectively enables or disables individual determination methods based on user requirements and enable codes, allowing the system to maintain full functionality while reducing processing overhead by only executing necessary methods.
Solution Approach 2:
The patent implements partial action by enabling only the necessary determination methods required for specific applications. Instead of always executing all available determination methods, the system selectively activates only those needed, reducing processing overhead and complexity while maintaining adequate functionality for the given application.
Data Source
AI summary
An electronic control system of a frequency converter repeatedly receives one nominal base value at a time for the operation of an electrical machine, determines a respective nominal current value using the respective nominal base value, and determines respective control signals for power semiconductors of the frequency converter using the respective nominal current value. The electronic control system controls the power semiconductors according to the determined respective control signals and thereby supplies the electrical machine with electrical energy such that the electrical machine is operated according to the nominal base value. The electronic control system determines the respective nominal current value and/or the respective control signals according to an enabled determination method if and as long as a permissible extent of use for the enabled determination method is larger than 0.