Modular Frequency Converter Ports for Flexible Grid Expansion
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Solution Overview
Problem
Existing frequency converters lack flexibility in port configurations and functional extensions, limiting their adaptability to various electrical systems and applications.
Innovation Solution
A frequency converter kit comprising basic units with plug-in connectors and extension units with dovetail connections, allowing for modular expansion and daisy-chain configurations, along with power electronics and heat sinks for cooling, to enhance adaptability and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency converters are designed with fixed port configurations, then manufacturing and operation are simplified, but adaptability to various electrical systems is reduced
Solution Approach 1:
The patent implements universal coupling elements on both basic units and extension units that can connect to identical coupling elements on any frequency converter unit. This allows any unit to serve multiple functions - as a standalone converter or as part of an extended system - eliminating the need for different port configurations for different applications.
Solution Approach 2:
The frequency converter is divided into modular basic units and extension units, each with standardized coupling elements. This segmentation allows the system to be configured in different ways (single unit, daisy-chain, star topology) while maintaining consistent connection interfaces, thus achieving adaptability without increasing interface complexity.
2Adaptability or versatility
If extension units are added to basic frequency converters, then functional versatility is improved, but device complexity increases
Solution Approach 1:
Both basic units and extension units are equipped with the same type of coupling elements, allowing extension units to be attached to basic units and other extension units interchangeably. This universal interface design simplifies the modular configuration process despite the increased functional versatility achieved through combinations of different unit types.
3Adaptability or versatility
If multiple frequency converters are connected in daisy-chain configuration, then system expandability is improved, but connection complexity increases
Solution Approach 1:
The system is segmented into independent frequency converter units, each with identical coupling elements capable of connecting to any other unit. This segmentation enables straightforward daisy-chain configurations where each unit connects to its neighbors through standardized interfaces, reducing connection complexity despite improved expandability.
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
Enables flexible and efficient connection of multiple frequency converters to AC voltage grids, supporting both basic and extended functionalities through modular design and cooling mechanisms.
Implementation Method 1
The basic units additionally have a heat sink for cooling the power electronics
Implementation Method 2
The heat sink may have, for example, outward-facing cooling fins that extend at an angle of, for example, 45 degrees in relation to a longitudinal axis of the basic units
Data Source
AI summary
A frequency converter kit includes: basic units having a first plug-in connector by means of which the basic units are connectable to an AC voltage grid; a power electronics system; and a heat sink for cooling the power electronics system, wherein the heat sink has coupling elements; and extension units that are pluggable onto the basic units and have a port by means of which the extension units are connectable to the AC voltage grid; a first plug-in connector for forming a plug-in connection with the first plug-in connector of the basic units; and a housing element, the housing element having coupling elements. The coupling elements of the basic units and the coupling elements of the extension units are formed such that they interlock when the extension units are plugged onto the basic units.