Bilateral switch switch-over single-phase and three-phase power supply and communication device and control method thereof

Abstract

The invention relates to the field of communication control and provides a bilateral switch switch-over single-phase and three-phase power supply and communication device and a control method thereof. The device comprises an AC power supply Va, a switch control circuit connected to the output end of the AC power supply Va, a plurality of power supplies connected to the output end of the switch control circuit and loads connected to the output ends of the power supplies, wherein the switch control circuit comprises a first switch device and a switch control device, the first switch device comprises a bilateral switch S1 which is connected with the output end of the AC power supply Va, the control end of the bilateral switch S1 is connected with the switch control device, a digital chip is connected into each power supply. According to the invention, an AC power supply line control end is added to the bilateral switch based communication device to achieve the purpose of simple communication. The digital chip in each power supply can be achieved simple with low cost; because of large signal information transfer, antijamming capability and communication reliability are high.

Description

technical field [0001] The invention relates to the field of communication control, in particular to a bidirectional switchable single-phase and three-phase power supply and communication device and a control method thereof. Background technique [0002] In the field of outdoor power supply applications and power supply system applications that require simple transmission of control information, such as LED street lights, tunnel lights, or other traditional lighting applications, due to the long power supply lines and many uncertain factors, the lamps and lanterns are generally powered by AC power from the mains. The power supply in the system is used for power supply, and the communication and control are carried out through a separate communication device or line. For example, in the application of LED street lamps, it is necessary to adjust the brightness of the street lamps every few hours, that is, the so-called dimming. This method has great economic and social signifi...

AI Technical Summary

Problems solved by technology

Timing dimming: The timer starts working when the power is turned on, and after a set period of time, it adjusts the current inside the power supply to achieve the required brightness. The advantage is that the cost is very low, and no external wires, controllers, etc. are required. , but because it cannot communicate with the outside, once the timing strategy is set, it cannot be changed, so it is not suitable for street lighting applications with large differences in nighttime length in winter and summer, nor for applications such as tunnel lights

The core requirement of engineering applications is the secondary energy saving based on dimming. This requirement only requires unified adjustment of certain road sections or a certain group of lights (group control), and does not need to control individual lights one by one; It is very small, and only needs to send a simple dimming percentage signal; the dimming interval is long, and it is generally adjusted every few hours; therefore, the demand for dimming applications is: the signal volume is extremely small, the number of signal transmissions is small, and only when adjustment is required Communication is required, and the dimming timing control strategy can be customized in advance and written to the internal memory of the power supply at one time during communication. Single lamp control is not required but group control is required, and rewiring is avoided as far as possible; among the above four methods, the dimming line is used The control method is more in line with the dimming requirements, PLC communication and wireless communication greatly exceed the actual needs, and the timing dimming cannot meet the needs of communication adjustment, and there are not many applications

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