Compressor Module Series Connection for Inrush Current Distribution
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Solution Overview
Problem
Conventional compressor module systems face challenges with high inrush currents and phase loading fluctuations, requiring costly reprogramming and hardware modifications for adding or replacing modules, and are limited by the number of interfaces in the control unit.
Innovation Solution
The compressor module design includes a delay circuit and reversible three-phase connections, allowing series connection of modules without direct interface to the controller, distributing inrush currents and phase loading evenly across the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple compressor modules are connected in parallel to a control unit, then the system can provide sufficient cooling capacity, but the inrush currents and phase load in the network fluctuate greatly
Solution Approach 1:
The patent applies periodic action by sequentially switching on compressor modules instead of simultaneously. The control unit activates compressors in a defined sequence with time intervals, preventing inrush current peaks from adding up. This periodic activation pattern resolves the contradiction by maintaining total cooling capacity while eliminating harmful current fluctuations.
2Adaptability or versatility
If compressor modules are connected via a common controller with multiple interfaces, then all modules can be controlled, but adding or replacing modules requires costly reprogramming and hardware modifications
Solution Approach 1:
The patent segments the control function by assigning a simple identification memory to each compressor module instead of requiring complex individual control interfaces. Each module independently stores its identification code, allowing the control unit to recognize and manage any number of modules through a single interface without reprogramming. This segmentation resolves the contradiction by enabling high adaptability with minimal modification effort.
Solution Approach 2:
The control unit is designed with universal functionality to handle any number of compressor modules through a single standardized interface. The single interface can read identification codes from any module and apply appropriate control, making the system universally adaptable without requiring additional hardware or software modifications when modules are added or replaced.
3Device complexity
If the control unit has a fixed number of interfaces, then the hardware is simple, but the number of connectable compressor modules is limited
Solution Approach 1:
The patent introduces an identification code as an intermediary element that enables a single control interface to manage multiple compressor modules. Each module carries its unique identification code, allowing the control unit to distinguish and control any number of modules through one interface. This intermediary mechanism resolves the contradiction by maintaining simple hardware while achieving high adaptability.
Data Source
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AI summary
A compressor module, a cooling and/or heating system with compressor modules, and a method for operating a cooling and/or heating system are described.