Parallel AC Power Supply Communication via Fiber-Optic LAN
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Solution Overview
Problem
Conventional master-slave communication systems for AC power supplies connected in parallel suffer from slow signal transmission speeds, complex wiring, and reduced reliability due to the use of serial data communication interfaces like RS-232 or RS-485, which impede immediate response and synchronous action between the master and slaves, affecting the output quality of AC power supplies.
Innovation Solution
A master-slave communication system utilizing a network transmission interface with fiber-optic or network cables connecting main and phase communication control boards between the master and slaves, enabling LAN formation and signal transmission speeds of up to 10/100/1000Mbps, allowing for immediate response and synchronous action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If serial data communication interfaces (RS-232 or RS-485) are used for master-slave communication, then the communication system can be established, but the signal transmission speed is slow (less than 1Mbit)
Solution Approach 1:
The patent replaces traditional electrical serial communication interfaces (RS-232/RS-485) with an optical communication system using fiber optic cables and optical transceivers. This substitution transforms the communication medium from electrical signals to optical signals, achieving transmission speeds of 10/100/1000Mbps while eliminating electrical interference and signal degradation issues, thus simultaneously improving both speed and reliability
Solution Approach 2:
The patent changes the fundamental parameter of signal transmission medium from electrical conductors to optical fibers. By changing the physical state and transmission medium parameters, the system achieves higher bandwidth (10/100/1000Mbps vs. <1Mbit) and improved signal integrity over long distances, resolving the contradiction between speed and reliability
2Ease of operation
If serial data communication interfaces are provided for master-slave communication, then communication control can be performed, but the wiring is complicated and the total length of communication transmission cable is too long
Solution Approach 1:
The patent segments the communication network into standardized nodes, each equipped with network interface cards and optical transceivers. This segmentation allows each device to independently connect to the fiber optic network, simplifying the overall wiring structure and reducing the need for long point-to-point connections, thus reducing both wiring complexity and total cable length
Solution Approach 2:
The patent implements a universal Ethernet-based communication interface that can be used by all master and slave devices. This universal interface standardizes connections and allows the use of standard network infrastructure, greatly simplifying wiring compared to dedicated serial communication lines for each device pair
3Adaptability or versatility
If the master and slaves are connected in parallel with direct connections, then power output can be expanded, but the wiring is complicated
Solution Approach 1:
The patent introduces a standardized communication network (fiber optic Ethernet) as an intermediary between master and slave devices. This intermediary provides a uniform communication channel that simplifies the connection structure, allowing power output expansion without proportionally increasing wiring complexity, as all devices connect to the same network infrastructure
Data Source
AI summary
A master-slave communication system for a single-phase to multi-phase AC power supply includes a master and a plurality of slaves that are connected in parallel and configured to supply single-phase to multi-phase AC power. The master and the slaves each include a main communication control board and at least one phase communication control board. The main communication control board is in communication with the corresponding phase communication control board. The master and an adjacent one of the slaves as well as every adjacent two of the slaves are in communication with each other through a network transmission cable connected between the main communication control boards, thereby improving the communication transmission speed and reliability between the master and the slaves and further improving the output quality of the AC power supply.