PoE Isolation Module Integrating Surge and EMI Protection
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Solution Overview
Problem
Conventional network transformers for Ethernet do not integrate protection elements, leading to increased volume and cost, and require separate installation of additional protection elements, causing inconvenience and inefficiency.
Innovation Solution
An electrical isolation module integrating a network transformer, common mode choke, and transient voltage suppressor, which includes a transformer with windings connected to a common mode choke and transient voltage suppressor, providing integrated protection and signal isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protection elements are installed separately from the network transformer, then the protection function is improved, but the overall volume and cost increase
Solution Approach 1:
The patent combines the network transformer and protection elements (transient voltage suppressor, common mode choke, filter circuit) into a single integrated module. The transformer primary winding connects to the common mode choke, which connects to the transient voltage suppressor, creating a compact protected network transformer module that reduces overall volume while maintaining protection functionality.
2Reliability
If protection elements are installed separately from the network transformer, then the protection function is improved, but the device complexity and cost increase
Solution Approach 1:
The patent integrates multiple protection elements and the network transformer into a single module, reducing device complexity by eliminating separate installation and matching processes. The integrated module includes the transformer, common mode choke, transient voltage suppressor, and filter circuit all connected in a predetermined configuration.
Solution Approach 2:
The integrated module serves multiple functions simultaneously: signal transformation, electromagnetic interference suppression, transient voltage protection, and power over Ethernet protection. This multi-functionality eliminates the need for separate protection elements and simplifies the overall system.
3Reliability
If protection elements are installed separately, then the protection function is improved, but the ease of operation deteriorates due to the need to search for matched elements
Solution Approach 1:
By integrating the protection elements with the network transformer in a single module, the patent eliminates the need for users to search for and match separate protection elements. The integrated module is installed as a single unit, significantly improving ease of operation and installation.
4Reliability
If additional protection elements are installed, then the protection function is improved, but the loss of substance increases
Solution Approach 1:
The integrated module combines the network transformer and protection elements into a single compact design, reducing material usage compared to separate installations. The module includes the transformer, common mode choke, transient voltage suppressor, and filter circuit all integrated in one package, minimizing the total material required.
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
The integrated module reduces volume, enhances signal transmission by blocking direct current components, suppresses electromagnetic interference, and optimizes signal transmission by offering a low-impedance return path through selective capacitance values.
Implementation Method 1
The main functions of a network transformer include undistorted signal transmission, impedance matching, electrical isolation
Implementation Method 2
Electromagnetic interference can be effectively suppressed by the common mode choke
Implementation Method 3
to avoid the impact of lightning surges on Ethernet, additional protection elements may be installed generally
Data Source
AI summary
An electrical isolation module for Power over Ethernet includes a network terminal connection section, a network chip connection section, and an isolation circuit. The network terminal connection section includes a plurality of first pins. The network chip connection section includes a plurality of second pins. The isolation circuit includes a transformer, a common mode choke, and a transient voltage suppressor. The common mode choke is connected between the transformer and the network terminal connection section. The transient voltage suppressor is connected between the transformer and the network chip connection section.