Fuseless Switch PLC Signal Cross-Phase Coupling
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Solution Overview
Problem
Conventional power line communication (PLC) networks experience significant signal attenuation when signals cross circuits, preventing effective network communication across different power line phases, especially when noise is present.
Innovation Solution
A fuseless switch design incorporating a movable contactor, electromagnetic tripper, base, and microcontroller with low-voltage couplers that allow PLC signals to cross phases without attenuation, utilizing a mechanism to control electrical connections and include vibration and status detection modules for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fuseless switch is used for circuit switching, then power flow control is achieved, but signal attenuation occurs when PLC signals cross phases
Solution Approach 1:
A low-voltage coupler is introduced as an intermediary component between the first and second circuit connection terminals. The coupler includes a coupler input terminal, coupler output terminal, and coupler ground terminal, creating a dedicated signal transmission path that mediates the signal crossing between different power phases while isolating it from the high-voltage switching operations.
Solution Approach 2:
The fuseless switch is segmented into distinct functional zones: a high-voltage power switching zone (movable contactor, switch) and a low-voltage signal transmission zone (low-voltage coupler). This segmentation allows independent optimization of each zone - the power zone handles switching while the signal zone maintains signal integrity across phase boundaries.
2Adaptability or versatility
If PLC signals are transmitted across separate power line circuits, then network connectivity is expanded, but signal attenuation increases by 100 to 1000 times
Solution Approach 1:
The low-voltage coupler serves as a specialized intermediary for inter-circuit signal transmission. It provides a controlled impedance path with proper grounding (coupler ground terminal) that maintains signal strength while enabling connectivity between otherwise isolated power line circuits.
Solution Approach 2:
The signal transmission path is extended into a new dimension by adding the coupler ground terminal reference plane. This creates a three-terminal coupler structure (input, output, ground) that provides an additional reference dimension for signal stability, enabling reliable transmission across circuit boundaries.
3Ease of operation
If conventional switching mechanisms are used, then power flow control is achieved, but PLC signal transmission is blocked or severely attenuated
Solution Approach 1:
The device is divided into independent power control section (movable contactor with electromagnetic tripper) and signal transmission section (low-voltage coupler). The power section uses mechanical/electromagnetic switching while the signal section uses electromagnetic coupling, allowing each to optimize its function without interfering with the other.
Solution Approach 2:
The low-voltage coupler acts as an intermediary that bridges the power switching domain and the signal transmission domain. It couples the ground lines of different circuits while providing a dedicated path for PLC signals, mediating between the high-voltage power operations and low-voltage communication requirements.
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 solution enables efficient signal transmission across power line phases, reducing attenuation and ensuring network connectivity across circuits while maintaining power flow, and allows for remote monitoring and control through integrated modules.
Implementation Method 1
an electromagnetic tripper coupled to the movable contactor and capable of driving the movable contactor to leave its original position
Implementation Method 2
a low-voltage coupler electrically coupled to a first ground line of the first circuit connection terminal and a second ground line of the second circuit connection terminal
Data Source
AI summary
A fuseless switch for a cross phase of a power line communication (PLC) network includes a movable contactor, a switch, an electromagnetic tripper, a base and a microcontroller. The microcontroller further includes a low-voltage coupler electrically connected to a first ground line of the first circuit connection terminal and a second ground line of the second circuit connection terminal, so that a network connection signal can cross phases to complete the transmission of information. When a PLC network signal passes through the fuseless switch, the signal proceeds from the low-voltage coupler without being affected or attenuated by the original fuseless switch circuit, so as to overcome the issue of transmitting signals through the power line to other circuits.