Single-phase bridge AC communication and power supply device and control method thereof

Abstract

The invention provides a single-phase bridge type alternating current communication and power supply device and a control method thereof. A switch control module is arranged between an alternating current output end and a power supply module, and comprises a bridge type switch control unit and a switch controller; the bridge type switch control unit comprises at least one bridge type circuit; the two input ends of the bridge type circuit are connected to the two output ends of single-phase alternating current; a plurality of power supplies are connected between the two output ends of each bridge type circuit, thus achieving communication through a power line; the signal amplitude is large, so that the communication is stable; the single-phase bridge type alternating current communication and power supply device is suitable for transmission of a relatively small data volume, low-frequency communication and group control; the power supply on a lamp side can be realized by only expanding the function of an inner single-chip microcomputer, so that the single-phase bridge type alternating current communication and power supply device is realized simply and reliably and low in cost.

Description

technical field [0001] The invention relates to the field of communication control, in particular to a single-phase bridge AC communication and power supply 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 significance because it can realize se...

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 application is 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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