Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Patent
1992-04-07
1993-01-12
Dzierzynski, Paul M.
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
333 12, H03H 709
Patent
active
051793628
ABSTRACT:
A noise induced from a switching power supply source or the like is applied to a power line. The noise is classified into two kinds, one of them being normal mode noise appearing between power lines and the other one being common mode noise appearing between a power line and a ground line. Thus, a line filter is required to attenuate these noises. The present invention provides a line filter for attenuating normal mode noise appearing on a power line between a live line and a neutral line as well as common mode noise appearing between the power line and a ground line, wherein the line filter includes a plurality of first inductors interposed between the live line and the neutral line, a first X-capacitor interposed between the live line and the neutral line on the load side relative to the first inductors, a plurality of second inductors interposed between the live line and the neutral line on the load side relative to the first X-capacitor, and a Y-capacitor interposed between the live line and the ground line as well as between the neutral line and the ground line on the load side relative to the second inductors, the Y-capacitor constituting a common mode filter between the first inductors and the second inductors in response to common mode noise.
REFERENCES:
patent: 4428018 (1984-01-01), Hahn
patent: 4667173 (1987-05-01), Okochi
patent: 4761623 (1988-08-01), Schneider
Sekri, "Power Line Filter", IBM Tech. Discl. Bulletin, vol. 17, No. 7, Dec. 1974, pp. 1998, 1999.
Hans-Werner Schulz, "Funk-Entstorung mit stromkompensierten Drosseln," Seimans-Bauteile-Informationen, 10 (1972) pp. 32-34.
Siemens, "MV Funk-Entstorung, Bauelemente, Filter," 1983/84, pp. 280-285.
Lon. M. Schneider; Noise Source Equivalent Circuit Model for Off Line Converters and Its Use in Input Filter Design; 1983 IEEE International Symposium on EMC, pp. 167-175.
Okochi, Power Supply Complying with International Regulations for Personal Computers, pp. 10-12, 1985.
Okochi et al., Analysis of Normal Mode Conducted Interference Voltage of Wide-Input-Voltage Range Off-Line Power Converters, pp. 17-23, 1988.
Okochi et al., An Optimal Conducted EMI-Reduction Scheme for Wide Input Voltage Range Off-Line Power Converters, PCIM '88 Proceedings, pp. 443-442, Dec. 1988.
Okochi Sadao
Takoda Terutaka
Dzierzynski Paul M.
Ham Seung
Kabushiki Kaisha Toshiba
LandOfFree
Power line filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power line filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power line filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1222783