Power line communication circuit and method based on switch ripple modulation
A power line communication and circuit technology, applied in distribution line transmission systems, electrical components, wired transmission systems, etc., can solve the problems of complex wiring, poor adjustability, large volume, etc., to improve power density, solve low efficiency, and ensure The effect of stability
Pending Publication Date: 2020-11-17
TIANJIN POLYTECHNIC UNIV
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[0004] The present invention provides a power line communication circuit and method based on switch ripple modulation, which is used to solve the problems of large volume, low frequency, low efficiency, complex wiring and poor adjustability of other current communication circuits
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[0031] figure 1 It is a schematic structural diagram of a power line communication method based on switch ripple modulation provided by an embodiment of the present invention, from figure 1 It can be seen that the power line communication circuit selected in the present invention is an interleaved parallel system of full-bridge LLC resonant converters to improve the transmission efficiency and load capacity of the converter itself. The input end of the converter is electrically connected to the DC bus, and the output end is electrically connected to the load, and is used for collecting the ripple size of the output current. Traditional PLC communication uses high-frequency signals as the carrier for data communication, and is superimposed on the power line through a coupling circuit, so PLC communication requires an independent signal modulation circuit. However, power electronic circuits will inevitably produce high-frequency current ripple at the output end during operation...
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The invention relates to a power line communication circuit and method based on switch ripple modulation, and the circuit comprises a parallel inversion module, a double-path magnetic integration module, a parallel rectification module, and a control module. The parallel inversion module is connected with the double-path magnetic integration module, and is used for converting a first DC voltage into a first AC voltage to supply power to an LLC resonant cavity. Wherein the two-way magnetic integration module is connected with the parallel rectification module and used for converting first alternating-current voltage into second alternating-current voltage, the parallel rectification module is connected with a load and used for converting the second alternating-current voltage into second direct-current voltage to supply power to the load, and the control module is connected with the parallel inversion module. And the control module is used for controlling phase shift angles of upper andlower paths of converter driving signals so as to control the magnitude of output current ripples to perform data communication. The problems of large size, low frequency, low efficiency, complex wiring, poor adjustability and the like of other communication circuits at present are solved.
Description
technical field [0001] The invention relates to the field of power line carrier communication data transmission, in particular to a power line communication circuit and method based on switch ripple modulation. Background technique [0002] With the rapid development of my country's power electronics technology, the use of switching ripple generated by power electronics circuits as a communication carrier for data transmission has become one of the ways of power electronics networking. [0003] In traditional distributed systems, bus communication technologies such as RS485 and CAN are widely used. Although this method can significantly reduce the length of the connection and effectively suppress common-mode interference, it requires an independent communication line and power supply. So wiring is more complicated. Most of the most advanced control methods currently use frequency conversion to control the output ripple of the converter, and use the ripple as a communication...
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IPC IPC(8): H04B3/54H04L27/20
CPCH04B3/54H04B3/548H04L27/20
Inventor 高圣伟贺琛牛萍娟赵子祎王浩查茜董晨名刘赫
Owner TIANJIN POLYTECHNIC UNIV