Current Equalization Module for PoE Power Supply Systems
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Solution Overview
Problem
The existing power over Ethernet (PoE) systems require multiple DC/DC modules to supply larger powers, leading to increased costs and bulkiness due to current equalization after conversion, which is inefficient and costly.
Innovation Solution
A current equalization module detects and equalizes currents from multiple power supply lines before they reach a voltage converter, allowing a single DC/DC module to handle the combined currents, reducing the number of required converters and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple DC/DC modules are used to supply larger power, then the power delivery capability is improved, but the system complexity and cost increase
Solution Approach 1:
The patent combines multiple power supply lines into a single DC/DC module by implementing current equalization before the voltage conversion stage. Multiple input lines are merged at the current equalization module, which balances the current distribution, and then a single DC/DC module processes the combined current, replacing the need for multiple separate DC/DC modules.
Solution Approach 2:
The patent introduces a current equalization module as an intermediary component between the multiple power supply lines and the single DC/DC module. This mediator balances the current distribution across input lines before they enter the voltage conversion stage, enabling efficient operation of a single DC/DC module with multiple input sources.
2Power
If multiple DC/DC modules are used to supply larger power, then the power delivery capability is improved, but the implementation cost increases
Solution Approach 1:
The patent combines multiple power supply lines into a single DC/DC module by implementing current equalization before the voltage conversion stage. Multiple input lines are merged at the current equalization module, which balances the current distribution, and then a single DC/DC module processes the combined current, replacing the need for multiple separate DC/DC modules.
3Reliability
If current equalization is performed after DC/DC conversion, then each power line can be independently converted, but the number of DC/DC modules increases
Solution Approach 1:
The patent performs current equalization before the DC/DC conversion stage rather than after. By balancing the current distribution across multiple input lines prior to voltage conversion, the system enables a single DC/DC module to efficiently process the combined current, avoiding the need for multiple separate conversion modules.
Data Source
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AI summary
The present invention provides a power supply method, a current equalization module, and a power supply system. The power supply method includes detecting, by the current equalization module, currents of at least two power supply lines; equalizing the currents of the at least two power supply lines based on the intensity of the currents that have been detected in order to enable the currents of at least two power supply lines to have the same intensity; sending the equalized currents to a voltage converter where the voltage corresponding to the equalized currents is converted to supply power to a terminal device. According to the present invention, currents have been equalized before arriving at a voltage converter (that is, a DC/DC module), so that only one voltage converter (that is, one DC/DC module) is used even in the case of large power output, which reduces the number of required voltage converters (that is, DC/DC modules) and thereby reduces the costs.