Cable-End Matching Circuit for Compact Power Line Communication
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Solution Overview
Problem
The size of the connection structure between control and driving devices in communication systems is increased due to the addition of filters for impedance matching, which can lead to signal reflection and poor communication.
Innovation Solution
A communication system with a control circuitry and driving circuitry that includes impedance uppers, insulators, and matching circuits with coils and capacitors to maintain impedance matching and reduce signal reflection without increasing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is added to maintain impedance matching between the terminal device and power line, then communication quality is improved, but the size of the connection structure increases
Solution Approach 1:
The patent combines the filter function with the existing insulator structure. The insulator, which already provides electrical insulation between the communication circuit and power line, is integrated with filtering elements (capacitors and inductors) to perform both insulation and impedance matching functions simultaneously, thereby maintaining communication quality without increasing connection structure size
Solution Approach 2:
The insulator is designed to serve multiple functions: electrical insulation, signal filtering, and impedance matching. By making the insulator multi-functional, the patent eliminates the need for separate filter components, thus improving communication reliability while preventing an increase in the connection structure size
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
Enables effective communication between devices while preventing an increase in the connection structure size by using impedance uppers, insulators, and matching circuits to minimize signal reflection.
Implementation Method 1
a first matching circuit that includes the first coil and the first capacitor and reduces reflection of the communication signal in an end portion of the cable is formed between the one communication circuitry and the cable
Data Source
AI summary
An impedance upper is provided between one unit out of a control unit and a driving unit, and a cable. An insulator is provided between one communication unit out of communication units, and the cable. Between the one communication unit and the cable, a matching circuit that includes a coil of the impedance upper and a capacitor of the insulator, and reduces reflection of a communication signal in an end portion of the cable is provided. Alternatively, an insulator is provided between the one communication unit and the cable. A filter circuit is provided between the insulator and the one communication unit. Between the one communication unit and the cable, a matching circuit that includes a coil of the insulator and a capacitor of the filter circuit, and reduces reflection of a communication signal at an end portion of the cable, is formed.