JPH0262848U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 shows a circuit diagram of a current signal injection circuit according to an embodiment of this invention. FIG. 2 is a circuit diagram of a conventional current signal injection circuit, FIG. 3 is a signal waveform diagram of a main part, and FIG. 4 is a diagram for explaining the outline of a distribution line conveyance system. 1... Distribution line, 2... Inverter circuit, 3...
Current signal generation circuit, Tr3...Inverter transformer, Tr4...Bias transformer, _{L2C2 ...}
A series resonant circuit (resonating at a frequency near the inverter output frequency).

Claims (1)

[Claims for Utility Model Registration] Includes an inverter, an LC series resonant circuit into which the inverter output is input via an inverter transformer, and whose resonant frequency is a frequency near the inverter output frequency, and a current signal is sent via an injection transformer. a current signal generation circuit that outputs a current signal to a distribution line, the current signal injection circuit transforms the low voltage side output voltage of the injection transformer at a ratio of 1:1, and transforms the output side of the low voltage side output voltage of the injection transformer to the injection transformer of the inverter transformer. A current signal injection circuit comprising: a bias transformer connected in series on the bias transformer; and the LC series resonant circuit is connected in parallel to the secondary side of the bias transformer.