Thermodynamic Cycle Electronics Layout for Low EMI Control
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Solution Overview
Problem
Thermodynamic cycle process systems face high costs and limited flexibility due to redundant electronic components and adverse electromagnetic radiation, particularly in the supply electronics and power electronics, which restricts the use of alternative components and increases electromagnetic interference.
Innovation Solution
A thermodynamic cycle process system with integrated power electronics within each electronic component, reducing the need for central supply electronics and minimizing electromagnetic radiation by using unmodulated DC supply voltages, allowing for flexible component selection and reduced electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each electronic component has its own decentralised electronic units with supply electronics and power electronics, then the system can be controlled independently at each component, but the costs increase due to high redundancy of electronic components
Solution Approach 1:
The patent divides the electronic control system into modular units, where each electronic component (compressor, fan, pump, regulator valve) has its own integrated control unit with supply electronics and power electronics. This segmentation enables independent control of each component while maintaining system coordination through a central regulator, resolving the contradiction between operational independence and system complexity.
2Device complexity
If a central electronic unit supplies all components, then electronic components can be omitted and production costs reduced, but the electronic unit must be specially adapted to specific power ranges limiting flexibility
Solution Approach 1:
The patent creates universal control units with integrated supply electronics and power electronics that can adapt to different power ranges and component types. Each electronic component contains its own control unit that can universally interface with various components (compressors, fans, pumps, valves) regardless of their specific power requirements, eliminating the need for specially adapted central units while maintaining flexibility.
3Ease of operation
If long lines are used to connect central electronic unit to individual components, then component placement is flexible, but adverse electromagnetic radiation occurs affecting electronic components
Solution Approach 1:
The patent extracts the power electronics from a central location and integrates them into each individual electronic component. This eliminates the need for long connection lines between a central electronic unit and individual components, thereby removing the source of electromagnetic radiation along these lines while maintaining flexible component placement through wireless or short-connection alternatives.
4Productivity
If PWM modulated operating voltage is used for EC compressors and EC fans, then efficient control is achieved, but electromagnetic interference increases
Solution Approach 1:
The patent segments the power conversion function into individual control units at each electronic component, allowing PWM modulation to be applied locally rather than through long central lines. This segmentation maintains the efficiency benefits of PWM control for EC compressors and fans while minimizing electromagnetic interference by confining the modulation activity to localized areas with proper shielding and grounding.
Data Source
AI summary
The present invention relates to a thermodynamic cycle process system comprising at least two heat exchangers, an EC compressor, and a combination of electronic components such as EC fans, electronic regulator valves and/or EC pumps. A central supply electronics unit can be connected to an AC voltage source, wherein the electronic components have an integrated power electronics device which produces the PWM operating voltage required for the electronic components. The central supply electronics unit is connected to the individual integrated power electronics devices for the electronic components, and produces the supply voltages required for the respective power electronics devices.