Three-phase electronic control unit for enclosure air conditioners
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Solution Overview
Problem
Existing thermal management systems for electronic equipment enclosures often have single-phase controllers that are mismatched with three-phase cooling units, leading to installation complexities and inefficiencies, requiring additional components like transformers and phase voltage monitors to correct phase issues.
Innovation Solution
A three-phase electronic control unit that operates on a three-phase AC power supply, eliminating the need for these additional components by providing a simplified power connection and advanced monitoring and alarm features, such as phase sequence correction and overcurrent protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-phase controller is used with three-phase cooling units, then the controller can be simpler in design, but additional components like transformers and phase voltage monitors are required to correct phase issues
Solution Approach 1:
The patent merges the single-phase controller with three-phase power handling capability by integrating phase conversion circuitry directly into the controller. This combines previously separate components (single-phase controller, transformers, phase monitors) into a unified three-phase controller that can directly manage three-phase cooling units without external phase correction components.
Solution Approach 2:
The controller changes its operational parameters from single-phase to three-phase by incorporating three-phase power input circuitry and control logic. This parameter change eliminates the need for additional transformers and phase monitoring components, as the controller natively operates with three-phase power throughout its circuitry.
2Ease of manufacture
If a three-phase controller is used, then installation is simplified and costs are reduced, but the controller design becomes more complex
Solution Approach 1:
The controller is designed with multi-functionality to handle three-phase power input, distribution to multiple cooling units, phase sequencing, and system monitoring all within a single device. This universal design consolidates what would otherwise require multiple separate components, simplifying installation while managing complexity through integrated functionality.
3Reliability
If additional transformers and phase voltage monitors are added to correct phase mismatch, then phase issues are addressed, but system cost and complexity increase
Solution Approach 1:
The patent extracts the phase correction functionality from external components (transformers and phase voltage monitors) and integrates it directly into the controller's internal circuitry. This extraction eliminates the need for separate phase correction devices while maintaining reliable three-phase power management within the controller itself.
Data Source
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AI summary
A thermal management system for an enclosure containing electrical components includes a cooling unit for controlling temperature inside the enclosure and a controller (100, 300, 500) for the cooling unit, the controller being configured so that it can receive a three-phase power input signal and distribute power and control connected components using the three-phase signal. The controller can protect the compressor in critical scenarios such as thermal overload and overcurrent. The controller can output various faults such as missing phase alarm, imbalance phase alarm, overcurrent alarm, thermal overload alarm, door open alarm, and temperature and pressure alarms. An auto phase sequence correction controls the phase relay, accepting 3 phase 480VAC power input from facility power terminal, supplying 3 phase power to the compressor and motor impellers, 12V DC power to a display unit, and 24V DC power to a remote access control module.