Active compensation device that provides electromagnetic wave noise data

Abstract

The present invention provides an active compensation device that actively compensates for common-mode noise occurring in each of at least two or more high-current paths. [Solution] The active compensation device 100 includes a sensing unit that generates an output signal corresponding to a common-mode noise signal on a high-current path, an IC unit that receives the output signal as input and converts it into a digital signal, generates noise data and an amplified signal based at least on the digital signal, and outputs the noise data and the amplified signal, and a compensation unit that draws a compensation current from the high-current path or generates a compensation voltage on the high-current path based on the amplified signal, and provides the noise data to an external device. [Effects] By using an active EMI filter, EMI noise can be canceled out and EMI noise data can be collected. Noise data extracted and collected from the active EMI filter can be used for various purposes.

Claims

1. In an active compensation device that actively compensates for common-mode noise occurring in each of at least two or more high-current paths, A sensing unit that generates an output signal corresponding to the common-mode noise signal on the high-current path, An IC unit that receives the output signal as input, converts it into a digital signal, generates noise data and an amplified signal based at least on the digital signal, and outputs the noise data and the amplified signal. A compensation unit that draws a compensation current from the high-current path or generates a compensation voltage in the high-current path based on the amplification signal, Includes, The aforementioned noise data is provided to an external device. The IC unit receives the output signal as input, converts it into a digital signal, generates noise data, a first amplified signal, and a second amplified signal based on the digital signal, and outputs the noise data, the first amplified signal, and the second amplified signal. Active compensation device.

2. The aforementioned IC section is The digital signal is converted back to an analog signal, the analog signal is amplified to generate the amplified signal, and the amplified signal is output via the first output terminal. The active compensation device according to claim 1.

3. The IC section is Analog-to-digital conversion section, An input buffer that receives the output signal and attenuates it into a low-voltage analog signal usable by the analog-to-digital conversion unit, including, The active compensation device according to claim 1.

4. The analog-to-digital conversion unit is A converter circuit that generates the digital signal from the low-voltage analog signal, A configuration for processing and outputting the digital signal in order to reduce defects in the aforementioned noise data, including, The active compensation device according to claim 3.

5. The aforementioned IC section is A voltage-controlled oscillator for generating a clock signal to control the internal circuitry of the analog-to-digital conversion unit, Further including, The active compensation device according to claim 3.

6. The aforementioned IC section consists of one IC chip. The aforementioned IC chip is The input terminal to which the output signal of the sensing unit is input, A first output terminal that outputs the aforementioned amplified signal, A second output terminal that outputs the aforementioned noise data, including, The active compensation device according to claim 1.

7. The sensing unit is A sensing transformer including a primary side arranged on the high-current path and a secondary side that outputs the output signal to the IC unit, Includes, The sensing transformer has a structure in which the primary and secondary wires pass through a single core, or are wound at least once around it. The active compensation device according to claim 1.

8. The aforementioned compensation unit is A compensating transformer including a primary side connected to the output terminal of the IC section and a secondary side connected to the high-current path and generating the compensation voltage on the high-current path based on the amplification signal, including, The active compensation device according to claim 1.

9. A decoupling capacitor section comprising two Y-capacitors, each positioned between the sensing unit and the first device that generates a noise signal, with one end connected to a reference voltage and the other end connected to the high-current path, The active compensation device according to claim 8, further comprising:

10. The aforementioned compensation unit is A compensating transformer including a primary side connected to the output terminal of the IC section and a secondary side connected to the high-current path and which generates the compensation current on the high-current path based on the amplification signal, including, The active compensation device according to claim 1.

11. The aforementioned compensation unit is A compensating capacitor section including two Y-capacitors, one end of which is connected to the secondary side of the compensating transformer and the other end of which is connected to the high-current path, Further including, The active compensation device according to claim 10.

12. The compensating transformer has a structure in which the primary and secondary wires pass through a single core, or are wound at least once around it. The active compensation device according to claim 8 or claim 10.

13. The compensation unit includes a first compensation unit and a second compensation unit. The first compensation unit generates the compensation voltage based on the first amplified signal, The second compensation unit generates the compensation current based on the second amplification signal. The active compensation device according to claim 1.

14. The second compensation unit is positioned on the side of the first device that generates the noise signal, with reference to the sensing unit. The first compensation unit is positioned on the side of the second device connected to the first device by the high-current path, with reference to the sensing unit. The active compensation device according to claim 13.

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