Active compensation device providing electromagnetic wave noise data

Patent metadata

Field	Value
Publication number	US-12456920-B2
Application number	US-202218548347-A
Country	US
Kind code	B2
Filing date	Jun 3, 2022
Priority date	Jun 4, 2021
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

The present disclosure provides an active compensation device for actively compensating for noise generated in a common mode in each of at least two high-current paths. The active compensation device includes a sensing unit configured to generate an output signal corresponding to a common-mode noise signal on the high-current path, an integrated circuit (IC) unit including an amplification unit configured to output an amplified signal obtained by amplifying the output signal, and a digital circuit unit configured to output noise data into which the output signal is digitally converted, and a compensation unit configured to draw a compensation current out of the high-current path or generate a compensation voltage on the high-current path, based on the amplified signal. The noise data is provided to an external device.

First claim

The invention claimed is:

1. An active compensation device for actively compensating for noise generated in a common mode on each of at least two high-current paths, the active compensation device comprising:
a sensing unit configured to generate an output signal corresponding to a common-mode noise signal on the high-current path;
an integrated circuit (IC) unit comprising an amplification unit configured to output an amplified signal obtained by amplifying the output signal, and a digital circuit unit configured to output noise data into which the output signal is digitally converted; and
a compensation unit configured to draw a compensation current out of the high-current path or generate a compensation voltage on the high-current path, based on the amplified signal,
wherein the noise data is provided to an external device.

2. The active compensation device of claim 1 , wherein
the IC unit comprises a single IC chip, and
the single IC chip comprises an input terminal to receive the output signal of the sensing unit as an input, a first output terminal to output the amplified signal, and second output terminals to output the noise data.

3. The active compensation device of claim 1 , wherein the digital circuit unit comprises:
an analog-to-digital converter; and
an input buffer configured to receive the output signal and attenuate the output signal into a low-voltage analog signal that is usable for the analog-to-digital converter.

4. The active compensation device of claim 3 , wherein the IC unit further comprises a voltage controlled oscillator configured to generate by itself a clock signal for controlling an internal circuit of the analog-to-digital converter.

5. The active compensation device of claim 1 , wherein the IC unit is configured to control an operation of the amplification unit based on a digital signal generated by the digital circuit unit or the noise data.

6. The active compensation device of claim 1 , wherein the IC unit further comprises a first digital circuit unit configured to digitally convert an input signal of the amplification unit to generate first noise data, and a second digital circuit unit configured to digitally convert an output signal of the amplification unit to generate second noise data.

Assignees

• Em Coretech Inc
• Ulsan Nat Inst Science & Tech Unist

Inventors

• Kim Jin Gook
• Jeong Sang Yeong

Classifications

• H02M1/15

  using active elements · CPC title

• H02M1/143

  using compensating arrangements (for reducing noise from the supply in transmission systems H04B15/005) · CPC title

• H02M1/123 Primary

  Suppression of common mode voltage or current · CPC title

• H02M1/0012

  Control circuits using digital or numerical techniques (in DC/DC converters H02M3/157, H02M3/33515; in DC-AC converters H02M7/53873) · CPC title

• H02M1/0009

  Devices or circuits for detecting current in a converter · CPC title