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Patent Searching and Data


Title:
NOISE REDUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/192042
Kind Code:
A1
Abstract:
A compensation signal generation unit (60) generates, on the basis of a detection signal (vsns) of a noise detection unit (20), a compensation signal (icmp) for compensating electromagnetic noise on a connection line (m0). A compensation signal injection unit (80) injects the compensation signal (icmp) to the connection line (m0). A compensation signal detection unit (70) outputs the detected signal (vcmp) of the compensation signal (icmp). A low frequency component subtraction unit (50) amplifies a predetermined first frequency region component of the detected signal (vcmp) and negatively feeds back the amplified first frequency region component to the compensation signal generation unit (60). An intermediate frequency component adding unit (30) positively feeds back a predetermined second frequency component of the detection signal (vsns), which is higher than the first frequency region, to the compensation signal generation unit (60).

Inventors:
NAGASAWA SHINOBU (JP)
Application Number:
PCT/JP2020/013042
Publication Date:
September 30, 2021
Filing Date:
March 24, 2020
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02M1/12; G05F1/10; H02M7/48
Foreign References:
JP2019080469A2019-05-23
JP2010057268A2010-03-11
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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