Inductive Coupling Device for Power Line Data Transmission
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Solution Overview
Problem
Existing inductive coupling devices for power line communication are limited by high-frequency data signals, resulting in short transmission ranges of 2-3 Km, and lack waterproofing for outdoor use, making them unsuitable for medium-voltage power grids.
Innovation Solution
A two-way inductive coupling device using a ferromagnetic ring-shaped magnetic core with a copper winding and thermoplastic shell, operating between 50 kHz and 600 kHz, with a 2:1 transformation ratio, and featuring a waterproof design for outdoor use, allowing extended range up to 10-15 Km with controlled attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-frequency data signals (2-20 MHz) are used for inductive coupling, then data transmission speed is improved, but transmission range is limited to 2-3 Km
Solution Approach 1:
The patent changes the operating frequency parameter from high-frequency (2-20 MHz) to low-frequency (50 kHz - 600 kHz) range. This parameter change enables extended transmission range up to 10-15 Km while maintaining controlled attenuation (5-8 dB) through optimized magnetic core properties and winding configuration.
2Ease of manufacture
If standard inductive coupling devices are used, then installation is simple, but they lack waterproofing for outdoor use
Solution Approach 1:
The patent employs composite material construction combining ferromagnetic core segments with waterproof thermoplastic housing material. This composite structure maintains ease of installation through modular segmented design while providing comprehensive waterproof protection for outdoor deployment in medium-voltage power grids.
Solution Approach 2:
The patent utilizes a waterproof shell or coating structure that envelops the magnetic core and winding assembly. This protective layer provides environmental sealing while preserving the core functional characteristics and installation simplicity of the inductive coupling device.
3Loss of information
If high-frequency signals are transmitted, then signal bandwidth is improved, but attenuation increases and range is limited
Solution Approach 1:
The patent shifts the operating frequency parameter to the low-frequency range (50 kHz - 600 kHz) where signal attenuation is naturally lower. This enables transmission over extended distances (10-15 Km) with controlled attenuation levels (5-8 dB) while maintaining sufficient bandwidth for data communication applications.
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 device achieves extended data transmission range and reliability by using a ferromagnetic core with specific magnetic properties and a waterproof design, enabling efficient low-frequency signal transmission with minimal attenuation and protection from environmental factors.
Implementation Method 1
a winding (60) wound onto said ring-shaped magnetic core receiving said data signal from the connector and determining together with the power line (2) a current transformer coupling said data signal between said power line and said winding through the ring-shaped magnetic core (10)
Implementation Method 2
said ring-shaped magnetic core being ferromagnetic with the following properties: a saturation induction greater than 1.5 Tesla
Data Source
AI summary
The device comprises a current transformer having a ring-shaped magnetic core (10) internally defining an opening (15) for the arrangement of a power line (2) and a winding wound onto the core (10), the core (10) being split into at least two core segments (A, B) articulated to one another. Both core segments (A, B) are furthermore optimized with regard to surface finish and form factor to allow low attenuation in the low-frequency data signal between 50 kHz and 600 kHz transmitted to the power grid.