US 2025/0080165 A1Published application

Circuit for enhancing the inductance of a high current inductor

AssigneeHK Oceancomm Technology Co., Limited

InventorsHSIN-HSIEN LI, YONG-LIN ZHANG

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Abstract

An isolator for separating a power line into a power consumption side and a transmission side can be used to enhance power line communication (PLC) and to prevent time varying noise and impedance of the power consumption side in a communication frequency band from affecting communication effects, wherein the isolator often has a larger inductance value. This disclosure provides a special circuit, wherein the inductor is kept at a low inductance value when a low frequency alternating current flows through the inductor, but is kept at a high inductance value in the communication frequency band, and a small core can be used to satisfy requirements of the high inductance value in the communication frequency band.

Claims13

Dependent claims

A circuit for enhancing the inductance of a high current inductor, the circuit comprising:

a main inductor, wherein a first current correlating to a communication signal flows through the main inductor, which generates a voltage correlating to the communication signal, and the main inductor is disposed on a power supply line, while an alternating current or a direct current flows through the main inductor;
a coupler sensing a voltage across two ends of the main inductor or a predetermined ratio of the voltage across the two ends of the main inductor, and generating a coupling voltage;
and
a current generator receiving the coupling voltage through the coupler or another coupler to generate a second current, wherein the current generator utilizes the coupler or the another coupler to couple the second current to the main inductor, and the second current flows back to the coupler and then back to the current generator;
wherein an objective of the current generator is to replicate the first current to generate the second current, and a phase of the second current is close to a phase of the first current flowing through the main inductor, so that the second current flows into the main inductor to suppress the first current driven by the communication signal of the circuit itself.

2 more elements

A circuit for enhancing the inductance of a high current inductor, the circuit comprising:

a main inductor, wherein a first current correlating to a communication signal flows through the main inductor to generate a voltage correlating to the communication signal, wherein the main inductor is disposed on a power supply line, while an alternating current or a direct current flows through the main inductor;
a first inductor generating another voltage according to a voltage across two ends of the main inductor or a predetermined ratio of the voltage across the two ends of the main inductor;
a coupler sensing a voltage across two ends of the first inductor or a predetermined ratio of the voltage across the two ends of the first inductor, and generating a coupling voltage;
and
a current generator receiving, through the coupler or another coupler, the coupling voltage to generate a second current, wherein the current generator couples the second current using the coupler or the another coupler so that the main inductor generates a counter-electromotive force;
wherein an objective of the current generator is to generate the second current to replicate a magnetic field, generated by the first current in a core of the main inductor, and suppress the first current driven by the communication signal of the circuit itself.

3 more elements

Dependencies are inferred from the claim text.