Title:
LEAKAGE CURRENT REDUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/255247
Kind Code:
A1
Abstract:
The leakage current reduction device according to an embodiment is provided with: a voltage detection unit having an inductor for detecting voltage generated by a leakage current; a compensation voltage generation unit for generating a compensation voltage from the voltage detected by the voltage detection unit; and a compensation voltage application unit having an inductor for applying the compensation voltage generated by the compensation voltage generation unit. The leakage current reduction device is connected between a system power supply and a load device. The inductor of the voltage detection unit is provided with: a main winding connected to the wire between the system power supply and the load device; and an auxiliary winding magnetically coupled with the main winding and connected to the input of the compensation voltage generation unit. The compensation voltage generation unit generates a compensation voltage on the basis of the voltage generated by the auxiliary winding. The compensation voltage application unit generates, on the basis of the compensation voltage generated by the compensation voltage generation unit, an applied voltage to the wire to reduce the leakage current. The impedance of the inductor of the compensation voltage application unit is smaller than the impedance of the inductor of the voltage detection unit.
Inventors:
KAMIKURA MAMORU (JP)
NAGASAWA SHINOBU (JP)
NAGASAWA SHINOBU (JP)
Application Number:
PCT/JP2019/024079
Publication Date:
December 24, 2020
Filing Date:
June 18, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02M1/12; H02M1/44
Domestic Patent References:
| WO2010100934A1 | 2010-09-10 |
Foreign References:
| JP2018511287A | 2018-04-19 | |||
| JP2018191443A | 2018-11-29 | |||
| JP2008530964A | 2008-08-07 | |||
| JP2003087973A | 2003-03-20 | |||
| JP2004357447A | 2004-12-16 |
Other References:
J. BIELA ET AL.: "Passive and active hybrid integrated EMI filters", IEEE-TRANS. POWER ELECTRONICS, vol. 24, no. 5, 2009, pages 1340 - 1349, XP011257108
See also references of EP 3989421A4
See also references of EP 3989421A4
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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